Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in the Fe-based superconductor Fe0.98Te0.5Se0.5

Wang, Jinghui; Bao, Song; Shangguan, Yanyan; Cai, Zhengwei; Gan, Yuan; Li, Shichao; Ran, Kejing; Ma, Zhen; Winn, Barry L.; Christianson, Andrew D.; Zhong, Ruidan; Li, Jun; Gu, Genda; Wen, Jinsheng

doi:10.1103/physrevb.105.245129

Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in the Fe-based superconductor Fe 0.98 Te 0.5 Se 0.5

Journal Article · Tue Jun 21 00:00:00 EDT 2022 · Physical Review. B

DOI:https://doi.org/10.1103/physrevb.105.245129· OSTI ID:1875330

^[1]; ^[2]; ^[2]; Cai, Zhengwei ^[2]; Gan, Yuan ^[2]; Li, Shichao ^[2]; Ran, Kejing ^[1]; Ma, Zhen ^[3]; ^[4]; Christianson, Andrew D. ^[4]; Zhong, Ruidan ^[5]; Li, Jun ^[6]; Gu, Genda ^[7]; ^[2]

ShanghaiTech Univ. (China); Nanjing Univ. (China)
Nanjing Univ. (China)
Hubei Normal University, Huangshi (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Shanghai Jiao Tong Univ. (China)
ShanghaiTech Univ. (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Here, we have performed inelastic neutron scattering measurements on optimally doped Fe_0.98Te_0.5Se_0.5 and 10% Cu-doped Fe_0.88Cu_0.1Te_0.5Se_0.5 to investigate the substitution effects on the spin excitations in the whole energy range up to 300 meV. It is found that substitution of Cu for Fe enhances the low-energy spin excitations (≤100 meV), especially around the (0.5, 0.5) point, and leaves the high-energy magnetic excitations intact. In contrast to the expectation that Cu with spin 1/2 will dilute the magnetic moments contributed by Fe with a larger spin, we find that the 10% Cu doping enlarges the effective fluctuating moment from 2.85 to 3.13 μB/Fe, although there is no long- or short-range magnetic order around (0.5, 0.5) and (0.5, 0). The presence of enhanced magnetic excitations in the 10% Cu doped sample which is in the insulating state indicates that the magnetic excitations must have some contributions from the local moments, reflecting the dual nature of the magnetism in iron-based superconductors. We attribute the substitution effects to the localization of the itinerant electrons induced by Cu dopants. Furthermore, these results indicate that the Cu doping does not act as electron donor as in a rigid-band shift model, but more as scattering centers that localize the system.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Brookhaven National Laboratory (BNL); Hubei Provincial Natural Science Foundation of China; National Key Projects for Research and Development of China; National Natural Science Foundation of China (NSFC); Shanghai Sailing Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: AC05-00OR22725; SC0012704

OSTI ID:: 1875330

Journal Information:: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 24 Vol. 105; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (56)

Superconductivity, antiferromagnetism, and neutron scattering Tranquada, John M.; Xu, Guangyong; Zaliznyak, Igor A. Journal of Magnetism and Magnetic Materials, Vol. 350 https://doi.org/10.1016/j.jmmm.2013.09.029	journal	January 2014
Evolution from antiferromagnetic order to spin-glass state in Fe1.05−xCuxTe system Wang, Hangdong; Dong, Chiheng; Li, Zujuan Physics Letters A, Vol. 376, Issue 47-48 https://doi.org/10.1016/j.physleta.2012.10.028	journal	November 2012
Evidence for stripe correlations of spins and holes in copper oxide superconductors Tranquada, J. M.; Sternlieb, B. J.; Axe, J. D. Nature, Vol. 375, Issue 6532 https://doi.org/10.1038/375561a0	journal	June 1995
High-temperature superconductivity in iron pnictides and chalcogenides Si, Qimiao; Yu, Rong; Abrahams, Elihu Nature Reviews Materials, Vol. 1, Issue 4 https://doi.org/10.1038/natrevmats.2016.17	journal	March 2016
Quantum magnetic excitations from stripes in copper oxide superconductors Tranquada, J. M.; Woo, H.; Perring, T. G. Nature, Vol. 429, Issue 6991 https://doi.org/10.1038/nature02574	journal	June 2004
Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering Christianson, A. D.; Goremychkin, E. A.; Osborn, R. Nature, Vol. 456, Issue 7224 https://doi.org/10.1038/nature07625	journal	December 2008
Superconductivity gets an iron boost Mazin, Igor I. Nature, Vol. 464, Issue 7286 https://doi.org/10.1038/nature08914	journal	March 2010
Magnetic ground state of FeSe Wang, Qisi; Shen, Yao; Pan, Bingying Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms12182	journal	July 2016
A Mott insulator continuously connected to iron pnictide superconductors Song, Yu; Yamani, Zahra; Cao, Chongde Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms13879	journal	December 2016
Doping dependence of spin excitations and its correlations with high-temperature superconductivity in iron pnictides Wang, Meng; Zhang, Chenglin; Lu, Xingye Nature Communications, Vol. 4, Issue 1 https://doi.org/10.1038/ncomms3874	journal	December 2013
From (π,0) magnetic order to superconductivity with (π,π) magnetic resonance in Fe1.02Te1−xSex Liu, T. J.; Hu, J.; Qian, B. Nature Materials, Vol. 9, Issue 9 https://doi.org/10.1038/nmat2800	journal	July 2010
Normal-state spin dynamics and temperature-dependent spin-resonance energy in optimally doped BaFe1.85Co0.15As2 Inosov, D. S.; Park, J. T.; Bourges, P. Nature Physics, Vol. 6, Issue 3 https://doi.org/10.1038/nphys1483	journal	December 2009
Evolution of spin excitations into the superconducting state in FeTe1−xSex Lumsden, M. D.; Christianson, A. D.; Goremychkin, E. A. Nature Physics, Vol. 6, Issue 3 https://doi.org/10.1038/nphys1512	journal	January 2010
Nature of magnetic excitations in superconducting BaFe1.9Ni0.1As2 Liu, Mengshu; Harriger, Leland W.; Luo, Huiqian Nature Physics, Vol. 8, Issue 5 https://doi.org/10.1038/nphys2268	journal	March 2012
Magnetism and its microscopic origin in iron-based high-temperature superconductors Dai, Pengcheng; Hu, Jiangping; Dagotto, Elbio Nature Physics, Vol. 8, Issue 10 https://doi.org/10.1038/nphys2438	journal	October 2012
Absolute cross-section normalization of magnetic neutron scattering data Xu, Guangyong; Xu, Zhijun; Tranquada, J. M. Review of Scientific Instruments, Vol. 84, Issue 8 https://doi.org/10.1063/1.4818323	journal	August 2013
Gap symmetry and structure of Fe-based superconductors Hirschfeld, P. J.; Korshunov, M. M.; Mazin, I. I. Reports on Progress in Physics, Vol. 74, Issue 12 https://doi.org/10.1088/0034-4885/74/12/124508	journal	October 2011
The metal–insulator transition in Fe _{1.01− x} Cu _x Se Williams, A. J.; McQueen, T. M.; Ksenofontov, V. Journal of Physics: Condensed Matter, Vol. 21, Issue 30 https://doi.org/10.1088/0953-8984/21/30/305701	journal	July 2009
Magnetism and superconductivity in Fe _{1+ y} Te _{1− x} Se _x Tranquada, J. M.; Xu, Guangyong; Zaliznyak, I. A. Journal of Physics: Condensed Matter, Vol. 32, Issue 37 https://doi.org/10.1088/1361-648X/ab3b3b	journal	June 2020
Stripe antiferromagnetism and disorder in the Mott insulator NaFe 1 − x Cu x As ( x ≲ 0.5 ) Xin, Yizhou; Stolt, Ingrid; Song, Yu Physical Review B, Vol. 101, Issue 6 https://doi.org/10.1103/PhysRevB.101.064410	journal	February 2020
Spin dynamics in NaFeAs and NaFe 0.53 Cu 0.47 As probed by resonant inelastic x-ray scattering Song, Yu; Wang, Weiyi; Paris, Eugenio Physical Review B, Vol. 103, Issue 7 https://doi.org/10.1103/PhysRevB.103.075112	journal	February 2021
Spin gap and magnetic resonance in superconducting BaFe 1.9 Ni 0.1 As 2 Li, Shiliang; Chen, Ying; Chang, Sung Physical Review B, Vol. 79, Issue 17 https://doi.org/10.1103/PhysRevB.79.174527	journal	May 2009
Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe 2 As 2 Canfield, P. C.; Bud’ko, S. L.; Ni, Ni Physical Review B, Vol. 80, Issue 6 https://doi.org/10.1103/PhysRevB.80.060501	journal	August 2009
Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTe 0.6 Se 0.4 superconductor Argyriou, D. N.; Hiess, A.; Akbari, A. Physical Review B, Vol. 81, Issue 22 https://doi.org/10.1103/PhysRevB.81.220503	journal	June 2010
Doping-driven structural phase transition and loss of superconductivity in M x Fe 1 − x Se δ ( M = Mn , Cu ) Huang, Tzu-Wen; Chen, Ta-Kun; Yeh, Kuo-Wei Physical Review B, Vol. 82, Issue 10 https://doi.org/10.1103/PhysRevB.82.104502	journal	September 2010
Inelastic neutron scattering study of the resonance mode in the optimally doped pnictide superconductor LaFeAsO 0.92 F 0.08 Shamoto, Shin-ichi; Ishikado, Motoyuki; Christianson, Andrew D. Physical Review B, Vol. 82, Issue 17 https://doi.org/10.1103/PhysRevB.82.172508	journal	November 2010
Electron-hole asymmetry in the superconductivity of doped BaFe 2 As 2 seen via the rigid chemical-potential shift in photoemission Neupane, M.; Richard, P.; Xu, Y. -M. Physical Review B, Vol. 83, Issue 9 https://doi.org/10.1103/PhysRevB.83.094522	journal	March 2011
First-principles calculation of transition-metal impurities in LaFeAsO Nakamura, Kazuma; Arita, Ryotaro; Ikeda, Hiroaki Physical Review B, Vol. 83, Issue 14 https://doi.org/10.1103/PhysRevB.83.144512	journal	April 2011
Importance of the Fermi-surface topology to the superconducting state of the electron-doped pnictide Ba(Fe 1 − x Co x ) 2 As 2 Liu, Chang; Palczewski, A. D.; Dhaka, R. S. Physical Review B, Vol. 84, Issue 2 https://doi.org/10.1103/PhysRevB.84.020509	journal	July 2011
Superconductivity suppression of Ba 0.5 K 0.5 Fe 2 − 2 x M 2 x As 2 single crystals by substitution of transition metal ( M = Mn, Ru, Co, Ni, Cu, and Zn) Li, J.; Guo, Y. F.; Zhang, S. B. Physical Review B, Vol. 85, Issue 21 https://doi.org/10.1103/PhysRevB.85.214509	journal	June 2012
Magnetic order tuned by Cu substitution in Fe 1.1 − z Cu z Te Wen, Jinsheng; Xu, Zhijun; Xu, Guangyong Physical Review B, Vol. 86, Issue 2 https://doi.org/10.1103/PhysRevB.86.024401	journal	July 2012
Structural, magnetic, and electronic transport properties of hole-doped SrFe 2 − x Cu x As 2 single crystals Yan, Y. J.; Cheng, P.; Ying, J. J. Physical Review B, Vol. 87, Issue 7 https://doi.org/10.1103/PhysRevB.87.075105	journal	February 2013
Enhanced low-energy magnetic excitations via suppression of the itinerancy in Fe 0.98 − z Cu z Te 0.5 Se 0.5 Wen, Jinsheng; Li, Shichao; Xu, Zhijun Physical Review B, Vol. 88, Issue 14 https://doi.org/10.1103/PhysRevB.88.144509	journal	October 2013
Impurity effects on the normal-state transport properties of Ba 0.5 K 0.5 Fe 2 As 2 superconductors Li, Jun; Yuan, Jie; Ji, Min Physical Review B, Vol. 90, Issue 2 https://doi.org/10.1103/PhysRevB.90.024512	journal	July 2014
Soft striped magnetic fluctuations competing with superconductivity in Fe 1 + x Te Stock, C.; Rodriguez, E. E.; Sobolev, O. Physical Review B, Vol. 90, Issue 12 https://doi.org/10.1103/PhysRevB.90.121113	journal	September 2014
Theory of the evolution of magnetic order in Fe 1 + y Te compounds with increasing interstitial iron Ducatman, Samuel; Fernandes, Rafael M.; Perkins, Natalia B. Physical Review B, Vol. 90, Issue 16 https://doi.org/10.1103/PhysRevB.90.165123	journal	October 2014
Substitution of Ni for Fe in superconducting Fe 0.98 Te 0.5 Se 0.5 depresses the normal-state conductivity but not the magnetic spectral weight Wang, Jinghui; Zhong, Ruidan; Li, Shichao Physical Review B, Vol. 91, Issue 1 https://doi.org/10.1103/PhysRevB.91.014501	journal	January 2015
Local breaking of fourfold rotational symmetry by short-range magnetic order in heavily overdoped Ba ( Fe 1 − x Cu x ) 2 As 2 Wang, Weiyi; Song, Yu; Hu, Ding Physical Review B, Vol. 96, Issue 16 https://doi.org/10.1103/PhysRevB.96.161106	journal	October 2017
Toward the Mott state with magnetic cluster formation in heavily Cu-doped NaFe 1 − x Cu x As Xin, Yizhou; Stolt, Ingrid; Lee, Jeongseop A. Physical Review B, Vol. 99, Issue 15 https://doi.org/10.1103/PhysRevB.99.155114	journal	April 2019
Theory of the Magnetic Moment in Iron Pnictides Wu, Jiansheng; Phillips, Philip; Castro Neto, A. H. Physical Review Letters, Vol. 101, Issue 12 https://doi.org/10.1103/PhysRevLett.101.126401	journal	September 2008
Spin Gap and Resonance at the Nesting Wave Vector in Superconducting FeSe 0.4 Te 0.6 Qiu, Yiming; Bao, Wei; Zhao, Y. Physical Review Letters, Vol. 103, Issue 6 https://doi.org/10.1103/PhysRevLett.103.067008	journal	August 2009
Anomalous Suppression of the Orthorhombic Lattice Distortion in Superconducting Ba ( Fe 1 − x Co x ) 2 As 2 Single Crystals Nandi, S.; Kim, M. G.; Kreyssig, A. Physical Review Letters, Vol. 104, Issue 5 https://doi.org/10.1103/PhysRevLett.104.057006	journal	February 2010
Where Are the Extra d Electrons in Transition-Metal-Substituted Iron Pnictides? Wadati, H.; Elfimov, I.; Sawatzky, G. A. Physical Review Letters, Vol. 105, Issue 15 https://doi.org/10.1103/PhysRevLett.105.157004	journal	October 2010
Spin Waves in the ( π , 0 ) Magnetically Ordered Iron Chalcogenide Fe 1.05 Te Lipscombe, O. J.; Chen, G. F.; Fang, Chen Physical Review Letters, Vol. 106, Issue 5 https://doi.org/10.1103/PhysRevLett.106.057004	journal	February 2011
Unconventional Temperature Enhanced Magnetism in Fe 1.1 Te Zaliznyak, Igor A.; Xu, Zhijun; Tranquada, John M. Physical Review Letters, Vol. 107, Issue 21 https://doi.org/10.1103/PhysRevLett.107.216403	journal	November 2011
Co-Substitution Effects on the Fe Valence in the BaFe 2 As 2 Superconducting Compound: A Study of Hard X-Ray Absorption Spectroscopy Bittar, E. M.; Adriano, C.; Garitezi, T. M. Physical Review Letters, Vol. 107, Issue 26 https://doi.org/10.1103/PhysRevLett.107.267402	journal	December 2011
Do Transition-Metal Substitutions Dope Carriers in Iron-Based Superconductors? Berlijn, Tom; Lin, Chia-Hui; Garber, William Physical Review Letters, Vol. 108, Issue 20 https://doi.org/10.1103/PhysRevLett.108.207003	journal	May 2012
Effects of Transition Metal Substitutions on the Incommensurability and Spin Fluctuations in BaFe 2 As 2 by Elastic and Inelastic Neutron Scattering Kim, M. G.; Lamsal, J.; Heitmann, T. W. Physical Review Letters, Vol. 109, Issue 16 https://doi.org/10.1103/PhysRevLett.109.167003	journal	October 2012
Avoided Quantum Criticality and Magnetoelastic Coupling in BaFe 2 − x Ni x As 2 Lu, Xingye; Gretarsson, H.; Zhang, Rui Physical Review Letters, Vol. 110, Issue 25 https://doi.org/10.1103/PhysRevLett.110.257001	journal	June 2013
Neutron Spectroscopy Evidence on the Dual Nature of Magnetic Excitations in a van der Waals Metallic Ferromagnet Fe 2.72 GeTe 2 Bao, Song; Wang, Wei; Shangguan, Yanyan Physical Review X, Vol. 12, Issue 1 https://doi.org/10.1103/PhysRevX.12.011022	journal	February 2022
Strong Similarities between the Local Electronic Structure of Insulating Iron Pnictide and Lightly Doped Cuprate Ye, Cun; Ruan, Wei; Cai, Peng Physical Review X, Vol. 5, Issue 2 https://doi.org/10.1103/PhysRevX.5.021013	journal	April 2015
Perovskite-type oxides—The new approach to high- T c superconductivity Bednorz, J. Georg; Müller, K. Alex Reviews of Modern Physics, Vol. 60, Issue 3 https://doi.org/10.1103/RevModPhys.60.585	journal	July 1988
Magnetic, transport, and optical properties of monolayer copper oxides Kastner, M. A.; Birgeneau, R. J.; Shirane, G. Reviews of Modern Physics, Vol. 70, Issue 3 https://doi.org/10.1103/RevModPhys.70.897	journal	July 1998
Antiferromagnetic order and spin dynamics in iron-based superconductors Dai, Pengcheng Reviews of Modern Physics, Vol. 87, Issue 3 https://doi.org/10.1103/RevModPhys.87.855	journal	August 2015
Investigation of the Spin-Glass Regime between the Antiferromagnetic and Superconducting Phases in Fe _{1+ y} Se _x Te _{1- x} Katayama, Naoyuki; Ji, Sungdae; Louca, Despina Journal of the Physical Society of Japan, Vol. 79, Issue 11 https://doi.org/10.1143/JPSJ.79.113702	journal	November 2010
Multiband magnetism and superconductivity in Fe-based compounds Cvetkovic, V.; Tesanovic, Z. EPL (Europhysics Letters), Vol. 85, Issue 3 https://doi.org/10.1209/0295-5075/85/37002	journal	February 2009

Similar Records

Superstructures and magnetic order in heavily Cu-substituted (Fe1–xCux)1+yTe

Journal Article · Mon Jan 22 19:00:00 EST 2024 · Physical Review. B · OSTI ID:2426067

RKKY coupled local-moment magnetism in NaFe1–xCuxAs

Journal Article · Thu Oct 21 20:00:00 EDT 2021 · Physical Review. B · OSTI ID:1979666

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
condensed matter
electrical properties
inelastic neutron scattering
materials & applied physics
single crystal materials
spin dynamics

Enhanced low-energy magnetic excitations evidencing the Cu-induced localization in the Fe-based superconductor Fe 0.98 Te 0.5 Se 0.5

Citation Formats

References (56)

Similar Records

Related Subjects