Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping

Qian, Bin; Hu, Jin; Liu, Jinyu; Han, Zhida; Zhang, Ping; Guo, Lei; Jiang, Xuefan; Zou, T.; Zhu, M.; Dela Cruz, C. R.; Ke, X.; Mao, Z. Q.

doi:10.1103/physrevb.91.014504

Title: Weak ferromagnetism of $Cu_{x} Fe_{1 + y} As$ and its evolution with Co doping

Abstract

We have investigated electronic and magnetic properties of iron pnictide Cu_xFe_1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single crystal samples. Here, we found that Cu_xFe_1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature T_c ~ 42 K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: while the in-plane resistivity follows quadratic temperature dependence for T < 10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied Co doping effect on Cu_xFe_1+yAs and found that Co doping enhances the ferromagnetism with T_c increasing up to 83 K for Cu_xFe_0.5Co_0.5As. From these results, we discussed the origin of the ferromagnetism of Cu_xFe_1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.

Authors:

Qian, Bin ^[1]; Hu, Jin ^[2]; Liu, Jinyu ^[2]; Han, Zhida ^[3]; Zhang, Ping ^[3]; Guo, Lei ^[3]; Jiang, Xuefan ^[3]; Zou, T. ^[4]; Zhu, M. ^[4]; Dela Cruz, C. R. ^[5]; Ke, X. ^[4]; Mao, Z. Q. ^[2]

Changshu Institute of Technology (China); Tulane University, New Orleans, LA (United States)
Tulane University, New Orleans, LA (United States)
Changshu Institute of Technology (China)
Michigan State University, East Lansing, MI (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Jan 12 00:00:00 EST 2015

Research Org.:: Louisiana State Univ., Baton Rouge, LA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1670464

Alternate Identifier(s):: OSTI ID: 1180407

Grant/Contract Number:: SC0012432

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. B, Condensed Matter and Materials Physics

Additional Journal Information:: Journal Volume: 91; Journal Issue: 1; Journal ID: ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Qian, Bin, Hu, Jin, Liu, Jinyu, Han, Zhida, Zhang, Ping, Guo, Lei, Jiang, Xuefan, Zou, T., Zhu, M., Dela Cruz, C. R., Ke, X., and Mao, Z. Q. Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping.  United States: N. p., 2015. 
Web.  doi:10.1103/physrevb.91.014504.

Copy to clipboard


                    Qian, Bin, Hu, Jin, Liu, Jinyu, Han, Zhida, Zhang, Ping, Guo, Lei, Jiang, Xuefan, Zou, T., Zhu, M., Dela Cruz, C. R., Ke, X., & Mao, Z. Q. Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping.  United States.  https://doi.org/10.1103/physrevb.91.014504

Copy to clipboard


                    Qian, Bin, Hu, Jin, Liu, Jinyu, Han, Zhida, Zhang, Ping, Guo, Lei, Jiang, Xuefan, Zou, T., Zhu, M., Dela Cruz, C. R., Ke, X., and Mao, Z. Q. Mon .  
"Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping".  United States.  https://doi.org/10.1103/physrevb.91.014504.  https://www.osti.gov/servlets/purl/1670464.

Copy to clipboard


                    
@article{osti_1670464,

  title        = {Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping},

  author       = {Qian, Bin and Hu, Jin and Liu, Jinyu and Han, Zhida and Zhang, Ping and Guo, Lei and Jiang, Xuefan and Zou, T. and Zhu, M. and Dela Cruz, C. R. and Ke, X. and Mao, Z. Q.},

  abstractNote = {We have investigated electronic and magnetic properties of iron pnictide CuxFe1+yAs, which is isostructural to iron pnictide superconductors LiFeAs and NaFeAs, using polycrystalline and single crystal samples. Here, we found that CuxFe1+yAs is characterized by strong electron correlations and shows weak ferromagnetic behavior with the Curie temperature Tc ~ 42 K, in contrast with the superconductivity in LiFeAs and NaFeAs. Its electronic transport properties exhibit quasi-two-dimensional characteristics: while the in-plane resistivity follows quadratic temperature dependence for T < 10K, the c-axis resistivity shows nonmetal-to-metal crossover near 20 K. In addition, we have studied Co doping effect on CuxFe1+yAs and found that Co doping enhances the ferromagnetism with Tc increasing up to 83 K for CuxFe0.5Co0.5As. From these results, we discussed the origin of the ferromagnetism of CuxFe1+yAs and its relevance with the magnetism of iron pnictide superconductor parent compounds.},

  doi          = {10.1103/physrevb.91.014504},

  journal      = {Physical Review. B, Condensed Matter and Materials Physics},

  number       = 1,

  volume       = 91,

  place        = {United States},

  year         = {Mon Jan 12 00:00:00 EST 2015},

  month        = {Mon Jan 12 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1103/physrevb.91.014504

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 6 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

First-Principles Calculations of the Electronic Structure of Tetragonal $α$ -FeTe and $α$ -FeSe Crystals: Evidence for a Bicollinear Antiferromagnetic Order
journal, April 2009

Ma, Fengjie; Ji, Wei; Hu, Jiangping
Physical Review Letters, Vol. 102, Issue 17
DOI: 10.1103/PhysRevLett.102.177003

Extreme sensitivity of superconductivity to stoichiometry in ${Fe}_{1 + δ} Se$
journal, January 2009

McQueen, T. M.; Huang, Q.; Ksenofontov, V.
Physical Review B, Vol. 79, Issue 1
DOI: 10.1103/PhysRevB.79.014522

K-Doping Dependence of the Fermi Surface of the Iron-Arsenic ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$ Superconductor Using Angle-Resolved Photoemission Spectroscopy
journal, October 2008

Liu, Chang; Samolyuk, G. D.; Lee, Y.
Physical Review Letters, Vol. 101, Issue 17
DOI: 10.1103/PhysRevLett.101.177005

Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent ${BaFe}_{2} {As}_{2}$ Compound of FeAs-Based High-Temperature Superconductors
journal, December 2008

Huang, Q.; Qiu, Y.; Bao, Wei
Physical Review Letters, Vol. 101, Issue 25
DOI: 10.1103/PhysRevLett.101.257003

Superconductivity gets an iron boost
journal, March 2010

Mazin, Igor I.
Nature, Vol. 464, Issue 7286
DOI: 10.1038/nature08914

Structure and superconductivity of LiFeAs
journal, January 2008

Pitcher, Michael J.; Parker, Dinah R.; Adamson, Paul
Chemical Communications, Issue 45
DOI: 10.1039/b813153h

Electronic structure and lattice dynamics of domeykite Cu3As according to nuclear quadrupolar resonance of75As and63,65Cu
journal, December 2002

Begaev, B. B.; Dooglav, A. V.; Kal’chev, V. P.
Applied Magnetic Resonance, Vol. 22, Issue 4
DOI: 10.1007/BF03166134

Fermi Surface Topology and Low-Lying Quasiparticle Dynamics of Parent ${Fe}_{1 + x} Te / Se$ Superconductor
journal, July 2009

Xia, Y.; Qian, D.; Wray, L.
Physical Review Letters, Vol. 103, Issue 3
DOI: 10.1103/PhysRevLett.103.037002

Electrical Resistivity and Magnetic Susceptibility Measurements on Copper Arsenides
journal, April 1973

Pauwels, L. J.; Maervoet, G.; Vervaeke, R.
Zeitschrift f�r anorganische und allgemeine Chemie, Vol. 397, Issue 3
DOI: 10.1002/zaac.19733970310

Unified minimum effective model of magnetic properties of iron-based superconductors
journal, April 2012

Hu, Jiangping; Xu, Bao; Liu, Wuming
Physical Review B, Vol. 85, Issue 14
DOI: 10.1103/PhysRevB.85.144403

Strong Correlations and Magnetic Frustration in the High $T_{c}$ Iron Pnictides
journal, August 2008

Si, Qimiao; Abrahams, Elihu
Physical Review Letters, Vol. 101, Issue 7
DOI: 10.1103/PhysRevLett.101.076401

Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors
journal, April 2012

Qian, B.; Lee, J.; Hu, J.
Physical Review B, Vol. 85, Issue 14
DOI: 10.1103/PhysRevB.85.144427

Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity
journal, October 2008

Subedi, Alaska; Zhang, Lijun; Singh, D. J.
Physical Review B, Vol. 78, Issue 13
DOI: 10.1103/PhysRevB.78.134514

LiFeAs: An intrinsic FeAs-based superconductor with $T_{c} = 18 K$
journal, August 2008

Tapp, Joshua H.; Tang, Zhongjia; Lv, Bing
Physical Review B, Vol. 78, Issue 6
DOI: 10.1103/PhysRevB.78.060505

Measurement of Coherent Polarons in the Strongly Coupled Antiferromagnetically Ordered Iron-Chalcogenide ${Fe}_{1.02} Te$ using Angle-Resolved Photoemission Spectroscopy
journal, January 2013

Liu, Z. K.; He, R. -H.; Lu, D. H.
Physical Review Letters, Vol. 110, Issue 3
DOI: 10.1103/PhysRevLett.110.037003

Electronic structure and doping in ${BaFe}_{2} {As}_{2}$ and LiFeAs: Density functional calculations
journal, September 2008

Singh, D. J.
Physical Review B, Vol. 78, Issue 9
DOI: 10.1103/PhysRevB.78.094511

CuFeAs: A New Member in the 111-Family of Iron-Pnictides
journal, May 2014

Thakur, Gohil S.; Haque, Zeba; Gupta, L. C.
Journal of the Physical Society of Japan, Vol. 83, Issue 5
DOI: 10.7566/JPSJ.83.054706

Antiferromagnetic spin fluctuations in LiFeAs observed by neutron scattering
journal, June 2011

Taylor, A. E.; Pitcher, M. J.; Ewings, R. A.
Physical Review B, Vol. 83, Issue 22
DOI: 10.1103/PhysRevB.83.220514

Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systems
journal, May 2008

de la Cruz, Clarina; Huang, Q.; Lynn, J. W.
Nature, Vol. 453, Issue 7197
DOI: 10.1038/nature07057

Microscopic origin of magnetism and magnetic interactions in ferropnictides
journal, June 2009

Johannes, M. D.; Mazin, I. I.
Physical Review B, Vol. 79, Issue 22
DOI: 10.1103/PhysRevB.79.220510

Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal
journal, July 2008

Ma, Fengjie; Lu, Zhong-Yi
Physical Review B, Vol. 78, Issue 3
DOI: 10.1103/PhysRevB.78.033111

Pressure-induced ferromagnetism in antiferromagnetic Fe $_{1.03}$ Te
journal, February 2013

Bendele, M.; Maisuradze, A.; Roessli, B.
Physical Review B, Vol. 87, Issue 6
DOI: 10.1103/PhysRevB.87.060409

Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO
journal, December 2008

Ma, Fengjie; Lu, Zhong-Yi; Xiang, Tao
Physical Review B, Vol. 78, Issue 22
DOI: 10.1103/PhysRevB.78.224517

Multiband magnetism and superconductivity in Fe-based compounds
journal, February 2009

Cvetkovic, V.; Tesanovic, Z.
EPL (Europhysics Letters), Vol. 85, Issue 3
DOI: 10.1209/0295-5075/85/37002

Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba _0.6 K _0.4 Fe ₂ As ₂
journal, July 2008

Ding, H.; Richard, P.; Nakayama, K.
EPL (Europhysics Letters), Vol. 83, Issue 4
DOI: 10.1209/0295-5075/83/47001

Local antiferromagnetic exchange and collaborative Fermi surface as key ingredients of high temperature superconductors
journal, April 2012

Hu, Jiangping; Ding, Hong
Scientific Reports, Vol. 2, Issue 1
DOI: 10.1038/srep00381

Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs
journal, June 2011

Stockert, U.; Abdel-Hafiez, M.; Evtushinsky, D. V.
Physical Review B, Vol. 83, Issue 22
DOI: 10.1103/PhysRevB.83.224512

Valley-dependent optoelectronics from inversion symmetry breaking
journal, June 2008

Yao, Wang; Xiao, Di; Niu, Qian
Physical Review B, Vol. 77, Issue 23
DOI: 10.1103/PhysRevB.77.235406

(π, π) electronic order in iron arsenide superconductors
journal, January 2009

Zabolotnyy, V. B.; Inosov, D. S.; Evtushinsky, D. V.
Nature, Vol. 457, Issue 7229
DOI: 10.1038/nature07714

Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
journal, August 2011

Heyer, O.; Lorenz, T.; Zabolotnyy, V. B.
Physical Review B, Vol. 84, Issue 6
DOI: 10.1103/PhysRevB.84.064512

Chalcogen-Height Dependent Magnetic Interactions and Magnetic Order Switching in ${FeSe}_{x} {Te}_{1 - x}$
journal, February 2010

Moon, Chang-Youn; Choi, Hyoung Joon
Physical Review Letters, Vol. 104, Issue 5
DOI: 10.1103/PhysRevLett.104.057003

ARPES studies of the electronic structure of LaOFe(P,As)
journal, May 2009

Lu, D. H.; Yi, M.; Mo, S. -K.
Physica C: Superconductivity, Vol. 469, Issue 9-12
DOI: 10.1016/j.physc.2009.03.044

Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition
journal, August 2008

Yildirim, T.
Physical Review Letters, Vol. 101, Issue 5
DOI: 10.1103/PhysRevLett.101.057010

First-order magnetic and structural phase transitions in ${Fe}_{1 + y} {Se}_{x} {Te}_{1 - x}$
journal, February 2009

Li, Shiliang; de la Cruz, Clarina; Huang, Q.
Physical Review B, Vol. 79, Issue 5
DOI: 10.1103/PhysRevB.79.054503

Competing orders and spin-density-wave instability in La(O _1−x F _x )FeAs
journal, June 2008

Dong, J.; Zhang, H. J.; Xu, G.
EPL (Europhysics Letters), Vol. 83, Issue 2
DOI: 10.1209/0295-5075/83/27006

Tunable ( $δ π$ , $δ π$ )-Type Antiferromagnetic Order in $α$ -Fe(Te,Se) Superconductors
journal, June 2009

Bao, Wei; Qiu, Y.; Huang, Q.
Physical Review Letters, Vol. 102, Issue 24
DOI: 10.1103/PhysRevLett.102.247001

Theory of the Magnetic Moment in Iron Pnictides
journal, September 2008

Wu, Jiansheng; Phillips, Philip; Castro Neto, A. H.
Physical Review Letters, Vol. 101, Issue 12
DOI: 10.1103/PhysRevLett.101.126401

Unified Picture for Magnetic Correlations in Iron-Based Superconductors
journal, September 2010

Yin, Wei-Guo; Lee, Chi-Cheng; Ku, Wei
Physical Review Letters, Vol. 105, Issue 10
DOI: 10.1103/PhysRevLett.105.107004

Electronic structure of the iron-based superconductor LaOFeP
journal, September 2008

Lu, D. H.; Yi, M.; Mo, S. -K.
Nature, Vol. 455, Issue 7209
DOI: 10.1038/nature07263

Origin of Weak Ferromagnetism in Yb _x Fe ₄ Sb ₁₂ , Relationship between Weak Ferromagnetism and Filling Ratio x
journal, February 2007

Ikeno, Tsuyoshi; Mitsuda, Akihiro; Mizushima, Toshio
Journal of the Physical Society of Japan, Vol. 76, Issue 2
DOI: 10.1143/JPSJ.76.024708

Works referencing / citing this record:

Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD
text, January 2016

Cheung, Gavin K. C.; O'Hara, Cian; Moir, Graham
arXiv
DOI: 10.48550/arxiv.1610.01073

Observation of direct evolution from antiferromagnetism to superconductivity in $C u_{1 - x} L i_{x} FeAs$ ( $0 \leq x \leq 1.0$ )
journal, April 2018

Li, Kunkun; Yuan, Duanduan; Guo, Jiangang
Physical Review B, Vol. 97, Issue 13
DOI: 10.1103/physrevb.97.134503

Similar Records in DOE PAGES and OSTI.GOV collections:

Phase diagram and neutron spin resonance of superconducting ${NaFe}_{1 - x} {Cu}_{x} As$

Journal Article Tan, Guotai ; Song, Yu ; Zhang, Rui ; ... - Physical Review B

In this paper, we use transport and neutron scattering to study the electronic phase diagram and spin excitations of NaFe_1-xCu_xAs single crystals. Similar to Co- and Ni-doped NaFeAs, a bulk superconducting phase appears near x≈2% with the suppression of stripe-type magnetic order in NaFeAs. Upon further increasing Cu concentration the system becomes insulating, culminating in an antiferromagnetically ordered insulating phase near x≈50%. Using transport measurements, we demonstrate that the resistivity in NaFe_1-xCu_xAs exhibits non-Fermi-liquid behavior near x≈1.8%. Our inelastic neutron scattering experiments reveal a single neutron spin resonance mode exhibiting weak dispersion along c axis in NaFe_0.98Cu_0.02As. The resonance ismore »« less
Cited by 9
https://doi.org/10.1103/PhysRevB.95.054501

Full Text Available
Coexistence of antiferromagnetic and ferromagnetic spin correlations in $Ca {({Fe}_{1 - x} {Co}_{x})}_{2} {As}_{2}$ revealed by ${}^{75}{As}$ nuclear magnetic resonance

Journal Article Cui, J. ; Wiecki, P. ; Ran, S. ; ... - Physical Review B

Recent nuclear magnetic resonance (NMR) measurements revealed the coexistence of stripe-type antiferromagnetic (AFM) and ferromagnetic (FM) spin correlations in both the hole- and electron-doped BaFe ₂ As ₂ families of iron-pnictide superconductors by a Korringa ratio analysis. Motivated by the NMR work, we investigate the possible existence of FM fluctuations in another iron-pnictide superconducting family, Ca ( Fe _{1 - x}Co _x ) ₂ As ₂ . We reanalyzed our previously reported data in terms of the Korringa ratio and found clear evidence for the coexistence of stripe-type AFM and FM spin correlations in the electron-doped CaFe ₂ Asmore »« less
https://doi.org/10.1103/PhysRevB.94.174512
Pressure-tuned superconductivity and normal-state behavior in $Ba ({Fe}_{0.943} {Co}_{0.057})_{2} {As}_{2}$ near the antiferromagnetic boundary

Journal Article Liu, W. ; Wu, Y. F. ; Li, X. J. ; ... - Physical Review B

Superconductivity in iron pnictides is unconventional and pairing may be mediated by magnetic fluctuations in the Fe sublattice. Pressure is a clean method to explore superconductivity in iron based superconductors by tuning the ground state continuously without introducing disorder. Here we present a systematic high pressure transport study in Ba (Fe_{1 - x}Co_x)₂ As₂ single crystals with x = 0.057, which is near the antiferromagnetic instability. Resistivity ρ = ρ₀ + ATⁿ was studied under applied pressure up to 7.90 GPa. The parameter n approaches a minimum value of n ≈ 1 at a critical pressure P_c = 3.65 GPa.more »« less
Cited by 3
https://doi.org/10.1103/PhysRevB.97.144515

Full Text Available
Doping dependence of the magnitude of fluctuating spin moments in the normal state of the pnictide superconductor $Sr {(F e_{1 - x} C o_{x})}_{2} A s_{2}$ inferred from photoemission spectroscopy

Journal Article Vilmercati, P. ; Kim, Yeongkwan ; Mo, Sung-Kwan ; ... - Physical Review B

We report systematic temperature- and doping-dependent measurements of the Fe 3s core-level photoemission spectra in the normal state of superconducting Sr(Fe_1-xCo_x)₂As₂. The analysis of the Fe 3s spectrum provides an element-specific determination of the mean value of the magnitude of the Fe spin moment measured on the fast (10^-16-10^-15s) timescale of the photoemission process. The data reveal the ubiquitous presence in the normal state of Fe spin moments with magnitude fluctuating on short timescales. The data reveal a significant reduction of the magnitude of the effective Fe spin moment on going from the parent to the optimal doped compound. Themore »« less
Cited by 1
https://doi.org/10.1103/physrevb.99.155132

Full Text Available
Unconventional Charge Density Wave Order in the Pnictide Superconductor $Ba ({Ni}_{1 - x} {Co}_{x})_{2} {As}_{2}$

Journal Article Lee, Sangjun ; de la Peña, Gilberto ; Sun, Stella X. -L. ; ... - Physical Review Letters

Ba(Ni_1–xCo_x)₂As₂ is a structural homologue of the pnictide high temperature superconductor, Ba(Fe_1–xCo_x)₂As₂, in which the Fe atoms are replaced by Ni. Superconductivity is highly suppressed in this system, reaching a maximum T_c = 2.3 K, compared to 24 K in its iron-based cousin, and the origin of this T_c suppression is not known. Using x-ray scattering, we show that Ba(Ni_1–xCo_x)₂As₂ exhibits a unidirectional charge density wave (CDW) at its triclinic phase transition. The CDW is incommensurate, exhibits a sizable lattice distortion, and is accompanied by the appearance of α Fermi surface pockets in photoemission [B. Zhou et al., Phys. Rev.more »« less
Cited by 16
https://doi.org/10.1103/physrevlett.122.147601

Full Text Available

Similar Records

Title: Weak ferromagnetism of Cu x Fe 1 + y As and its evolution with Co doping

Abstract

Citation Formats

First-Principles Calculations of the Electronic Structure of Tetragonal α -FeTe and α -FeSe Crystals: Evidence for a Bicollinear Antiferromagnetic Order journal, April 2009

Extreme sensitivity of superconductivity to stoichiometry in Fe 1 + δ Se journal, January 2009

K-Doping Dependence of the Fermi Surface of the Iron-Arsenic Ba 1 − x K x Fe 2 As 2 Superconductor Using Angle-Resolved Photoemission Spectroscopy journal, October 2008

Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe 2 As 2 Compound of FeAs-Based High-Temperature Superconductors journal, December 2008

Superconductivity gets an iron boost journal, March 2010

Structure and superconductivity of LiFeAs journal, January 2008

Electronic structure and lattice dynamics of domeykite Cu3As according to nuclear quadrupolar resonance of75As and63,65Cu journal, December 2002

Fermi Surface Topology and Low-Lying Quasiparticle Dynamics of Parent Fe 1 + x Te / Se Superconductor journal, July 2009

Electrical Resistivity and Magnetic Susceptibility Measurements on Copper Arsenides journal, April 1973

Unified minimum effective model of magnetic properties of iron-based superconductors journal, April 2012

Strong Correlations and Magnetic Frustration in the High T c Iron Pnictides journal, August 2008

Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors journal, April 2012

Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity journal, October 2008

LiFeAs: An intrinsic FeAs-based superconductor with T c = 18 K journal, August 2008

Measurement of Coherent Polarons in the Strongly Coupled Antiferromagnetically Ordered Iron-Chalcogenide Fe 1.02 Te using Angle-Resolved Photoemission Spectroscopy journal, January 2013

Electronic structure and doping in BaFe 2 As 2 and LiFeAs: Density functional calculations journal, September 2008

CuFeAs: A New Member in the 111-Family of Iron-Pnictides journal, May 2014

Antiferromagnetic spin fluctuations in LiFeAs observed by neutron scattering journal, June 2011

Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systems journal, May 2008

Microscopic origin of magnetism and magnetic interactions in ferropnictides journal, June 2009

Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal journal, July 2008

Pressure-induced ferromagnetism in antiferromagnetic Fe 1.03 Te journal, February 2013

Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO journal, December 2008

Multiband magnetism and superconductivity in Fe-based compounds journal, February 2009

Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba 0.6 K 0.4 Fe 2 As 2 journal, July 2008

Local antiferromagnetic exchange and collaborative Fermi surface as key ingredients of high temperature superconductors journal, April 2012

Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs journal, June 2011

Valley-dependent optoelectronics from inversion symmetry breaking journal, June 2008

(π, π) electronic order in iron arsenide superconductors journal, January 2009

Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering journal, August 2011

Chalcogen-Height Dependent Magnetic Interactions and Magnetic Order Switching in FeSe x Te 1 − x journal, February 2010

ARPES studies of the electronic structure of LaOFe(P,As) journal, May 2009

Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition journal, August 2008

First-order magnetic and structural phase transitions in Fe 1 + y Se x Te 1 − x journal, February 2009

Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs journal, June 2008

Tunable ( δ π , δ π )-Type Antiferromagnetic Order in α -Fe(Te,Se) Superconductors journal, June 2009

Theory of the Magnetic Moment in Iron Pnictides journal, September 2008

Unified Picture for Magnetic Correlations in Iron-Based Superconductors journal, September 2010

Electronic structure of the iron-based superconductor LaOFeP journal, September 2008

Origin of Weak Ferromagnetism in Yb x Fe 4 Sb 12 , Relationship between Weak Ferromagnetism and Filling Ratio x journal, February 2007

Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD text, January 2016

Observation of direct evolution from antiferromagnetism to superconductivity in C u 1 − x L i x FeAs ( 0 ≤ x ≤ 1.0 ) journal, April 2018

Title: Weak ferromagnetism of $Cu_{x} Fe_{1 + y} As$ and its evolution with Co doping

First-Principles Calculations of the Electronic Structure of Tetragonal $α$ -FeTe and $α$ -FeSe Crystals: Evidence for a Bicollinear Antiferromagnetic Order
journal, April 2009

Extreme sensitivity of superconductivity to stoichiometry in ${Fe}_{1 + δ} Se$
journal, January 2009

K-Doping Dependence of the Fermi Surface of the Iron-Arsenic ${Ba}_{1 - x} K_{x} {Fe}_{2} {As}_{2}$ Superconductor Using Angle-Resolved Photoemission Spectroscopy
journal, October 2008

Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent ${BaFe}_{2} {As}_{2}$ Compound of FeAs-Based High-Temperature Superconductors
journal, December 2008

Superconductivity gets an iron boost
journal, March 2010

Structure and superconductivity of LiFeAs
journal, January 2008

Electronic structure and lattice dynamics of domeykite Cu3As according to nuclear quadrupolar resonance of75As and63,65Cu
journal, December 2002

Fermi Surface Topology and Low-Lying Quasiparticle Dynamics of Parent ${Fe}_{1 + x} Te / Se$ Superconductor
journal, July 2009

Electrical Resistivity and Magnetic Susceptibility Measurements on Copper Arsenides
journal, April 1973

Unified minimum effective model of magnetic properties of iron-based superconductors
journal, April 2012

Strong Correlations and Magnetic Frustration in the High $T_{c}$ Iron Pnictides
journal, August 2008

Ferromagnetism in CuFeSb: Evidence of competing magnetic interactions in iron-based superconductors
journal, April 2012

Density functional study of FeS, FeSe, and FeTe: Electronic structure, magnetism, phonons, and superconductivity
journal, October 2008

LiFeAs: An intrinsic FeAs-based superconductor with $T_{c} = 18 K$
journal, August 2008

Measurement of Coherent Polarons in the Strongly Coupled Antiferromagnetically Ordered Iron-Chalcogenide ${Fe}_{1.02} Te$ using Angle-Resolved Photoemission Spectroscopy
journal, January 2013

Electronic structure and doping in ${BaFe}_{2} {As}_{2}$ and LiFeAs: Density functional calculations
journal, September 2008

CuFeAs: A New Member in the 111-Family of Iron-Pnictides
journal, May 2014

Antiferromagnetic spin fluctuations in LiFeAs observed by neutron scattering
journal, June 2011

Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systems
journal, May 2008

Microscopic origin of magnetism and magnetic interactions in ferropnictides
journal, June 2009

Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal
journal, July 2008

Pressure-induced ferromagnetism in antiferromagnetic Fe $_{1.03}$ Te
journal, February 2013

Arsenic-bridged antiferromagnetic superexchange interactions in LaFeAsO
journal, December 2008

Multiband magnetism and superconductivity in Fe-based compounds
journal, February 2009

Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba _0.6 K _0.4 Fe ₂ As ₂
journal, July 2008

Local antiferromagnetic exchange and collaborative Fermi surface as key ingredients of high temperature superconductors
journal, April 2012

Specific heat and angle-resolved photoemission spectroscopy study of the superconducting gaps in LiFeAs
journal, June 2011

Valley-dependent optoelectronics from inversion symmetry breaking
journal, June 2008

(π, π) electronic order in iron arsenide superconductors
journal, January 2009

Resistivity and Hall effect of LiFeAs: Evidence for electron-electron scattering
journal, August 2011

Chalcogen-Height Dependent Magnetic Interactions and Magnetic Order Switching in ${FeSe}_{x} {Te}_{1 - x}$
journal, February 2010

ARPES studies of the electronic structure of LaOFe(P,As)
journal, May 2009

Origin of the 150-K Anomaly in LaFeAsO: Competing Antiferromagnetic Interactions, Frustration, and a Structural Phase Transition
journal, August 2008

First-order magnetic and structural phase transitions in ${Fe}_{1 + y} {Se}_{x} {Te}_{1 - x}$
journal, February 2009

Competing orders and spin-density-wave instability in La(O _1−x F _x )FeAs
journal, June 2008

Tunable ( $δ π$ , $δ π$ )-Type Antiferromagnetic Order in $α$ -Fe(Te,Se) Superconductors
journal, June 2009

Theory of the Magnetic Moment in Iron Pnictides
journal, September 2008

Unified Picture for Magnetic Correlations in Iron-Based Superconductors
journal, September 2010

Electronic structure of the iron-based superconductor LaOFeP
journal, September 2008

Origin of Weak Ferromagnetism in Yb _x Fe ₄ Sb ₁₂ , Relationship between Weak Ferromagnetism and Filling Ratio x
journal, February 2007

Excited and exotic charmonium, $D_s$ and $D$ meson spectra for two light quark masses from lattice QCD
text, January 2016

Observation of direct evolution from antiferromagnetism to superconductivity in $C u_{1 - x} L i_{x} FeAs$ ( $0 \leq x \leq 1.0$ )
journal, April 2018