Intertwined Magnetic and Nematic Orders in Semiconducting KFe0.8Ag1.2Te2

Song, Yu; Cao, Huibo; Chakoumakos, B. C.; Zhao, Yang; Wang, Aifeng; Lei, Hechang; Petrovic, C.; Birgeneau, Robert J.

doi:10.1103/PhysRevLett.122.087201

Title: Intertwined Magnetic and Nematic Orders in Semiconducting ${KFe}_{0.8} {Ag}_{1.2} {Te}_{2}$

Abstract

Superconductivity in the iron pnictides emerges from metallic parent compounds exhibiting intertwined stripe-type magnetic order and nematic order, with itinerant electrons suggested to be essential for both. Here we use x-ray and neutron scattering to show that a similar intertwined state is realized in semiconducting KFe_0.8Ag_1.2Te₂ (K₅Fe₄Ag₆Te₁₀) without itinerant electrons. We find that Fe atoms in KFe_0.8Ag_1.2Te₂ form isolated 2×2 blocks, separated by nonmagnetic Ag atoms. Long-range magnetic order sets in below T_N ≈ 35 K, with magnetic moments within the 2×2 Fe blocks ordering into the stripe-type configuration. A nematic order accompanies the magnetic transition, manifest as a structural distortion that breaks the fourfold rotational symmetry of the lattice. The nematic orders in KFe_0.8Ag_1.2Te₂ and iron pnictide parent compounds are similar in magnitude and in how they relate to the magnetic order, indicating a common origin. Since KFe_0.8Ag_1.2Te₂ is a semiconductor without itinerant electrons, this indicates that local-moment magnetic interactions are integral to its magnetic and nematic orders, and such interactions may play a key role in iron-based superconductivity.

Authors:

Song, Yu ^[1]; Cao, Huibo ^[2]; Chakoumakos, B. C. ^[2]; Zhao, Yang ^[3]; Wang, Aifeng ^[4]; Lei, Hechang ^[4]; Petrovic, C. ^[4]; Birgeneau, Robert J. ^[1]

Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.

Publication Date:: Mon Feb 25 00:00:00 EST 2019

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

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

OSTI Identifier:: 1504375

Alternate Identifier(s):: OSTI ID: 1546391; OSTI ID: 1559624; OSTI ID: 1571977

Report Number(s):: BNL-211490-2019-JAAM
Journal ID: ISSN 0031-9007; PRLTAO

Grant/Contract Number:: SC0012704; AC02-05CH11231; KC0402010; AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 122; Journal Issue: 8; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Song, Yu, Cao, Huibo, Chakoumakos, B. C., Zhao, Yang, Wang, Aifeng, Lei, Hechang, Petrovic, C., and Birgeneau, Robert J. Intertwined Magnetic and Nematic Orders in Semiconducting KFe0.8Ag1.2Te2.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevLett.122.087201.

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                    Song, Yu, Cao, Huibo, Chakoumakos, B. C., Zhao, Yang, Wang, Aifeng, Lei, Hechang, Petrovic, C., & Birgeneau, Robert J. Intertwined Magnetic and Nematic Orders in Semiconducting KFe0.8Ag1.2Te2.  United States.  https://doi.org/10.1103/PhysRevLett.122.087201

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                    Song, Yu, Cao, Huibo, Chakoumakos, B. C., Zhao, Yang, Wang, Aifeng, Lei, Hechang, Petrovic, C., and Birgeneau, Robert J. Mon .  
"Intertwined Magnetic and Nematic Orders in Semiconducting KFe0.8Ag1.2Te2".  United States.  https://doi.org/10.1103/PhysRevLett.122.087201.  https://www.osti.gov/servlets/purl/1504375.

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@article{osti_1504375,

  title        = {Intertwined Magnetic and Nematic Orders in Semiconducting KFe0.8Ag1.2Te2},

  author       = {Song, Yu and Cao, Huibo and Chakoumakos, B. C. and Zhao, Yang and Wang, Aifeng and Lei, Hechang and Petrovic, C. and Birgeneau, Robert J.},

  abstractNote = {Superconductivity in the iron pnictides emerges from metallic parent compounds exhibiting intertwined stripe-type magnetic order and nematic order, with itinerant electrons suggested to be essential for both. Here we use x-ray and neutron scattering to show that a similar intertwined state is realized in semiconducting KFe0.8Ag1.2Te2 (K5Fe4Ag6Te10) without itinerant electrons. We find that Fe atoms in KFe0.8Ag1.2Te2 form isolated 2×2 blocks, separated by nonmagnetic Ag atoms. Long-range magnetic order sets in below TN ≈ 35 K, with magnetic moments within the 2×2 Fe blocks ordering into the stripe-type configuration. A nematic order accompanies the magnetic transition, manifest as a structural distortion that breaks the fourfold rotational symmetry of the lattice. The nematic orders in KFe0.8Ag1.2Te2 and iron pnictide parent compounds are similar in magnitude and in how they relate to the magnetic order, indicating a common origin. Since KFe0.8Ag1.2Te2 is a semiconductor without itinerant electrons, this indicates that local-moment magnetic interactions are integral to its magnetic and nematic orders, and such interactions may play a key role in iron-based superconductivity.},

  doi          = {10.1103/PhysRevLett.122.087201},

  journal      = {Physical Review Letters},

  number       = 8,

  volume       = 122,

  place        = {United States},

  year         = {Mon Feb 25 00:00:00 EST 2019},

  month        = {Mon Feb 25 00:00:00 EST 2019}

}

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Works referencing / citing this record:

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Title: Intertwined Magnetic and Nematic Orders in Semiconducting KFe 0.8 Ag 1.2 Te 2

Abstract

Citation Formats

Symmetry-breaking orbital anisotropy observed for detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition journal, April 2011

Ising and spin orders in the iron-based superconductors journal, July 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

Nematic State of Pnictides Stabilized by Interplay between Spin, Orbital, and Lattice Degrees of Freedom journal, July 2013

Structure Evolution and Spin-Glass Transition of Layered Compounds ALiFeSe 2 (A = Na, K, Rb) journal, October 2017

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Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides journal, July 2012

Magnetic order in BaMn 2 As 2 from neutron diffraction measurements journal, September 2009

Spin Reorientation in TlFe 1.6 Se 2 with Complete Vacancy Ordering journal, August 2012

Local breaking of fourfold rotational symmetry by short-range magnetic order in heavily overdoped Ba ( Fe 1 − x Cu x ) 2 As 2 journal, October 2017

Antiferromagnetism in semiconducting KFe 0.85 Ag 1.15 Te 2 single crystals journal, August 2011

A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides journal, March 2014

Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors journal, December 2009

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Four-circle single-crystal neutron diffractometer at the High Flux Isotope Reactor journal, May 2011

Antiferromagnetic order and superlattice structure in nonsuperconducting and superconducting Rb y Fe 1.6 + x Se 2 journal, September 2011

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Iron displacements and magnetoelastic coupling in the antiferromagnetic spin-ladder compound BaFe 2 Se 3 journal, November 2011

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Gap symmetry and structure of Fe-based superconductors journal, October 2011

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

Mott localization in a pure stripe antiferromagnet Rb 1 − δ Fe 1.5 − σ S 2 journal, September 2015

Unusual phase transitions and magnetoelastic coupling in TlFe 1.6 Se 2 single crystals journal, June 2011

Evolution of the nuclear and magnetic structures of TlFe 1.6 Se 2 with temperature journal, February 2012

Common Crystalline and Magnetic Structure of Superconducting A 2 Fe 4 Se 5 ( A = K , Rb , Cs , Tl ) Single Crystals Measured Using Neutron Diffraction journal, September 2011

KFeCuTe 2 : a new compound to study the removal of interstitial Fe in layered tellurides journal, January 2017

Spin glass in semiconducting KFe 1.05 Ag 0.88 Te 2 single crystals journal, May 2015

A Novel Large Moment Antiferromagnetic Order in K 0.8 Fe 1.6 Se 2 Superconductor journal, August 2011

Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe journal, December 2015

Cesium vacancy ordering in phase-separated C s x F e 2 − y S e 2 journal, September 2015

Orbital ordering induces structural phase transition and the resistivity anomaly in iron pnictides journal, December 2009

Crystal and magnetic structure of CaCo 1.86 As 2 studied by x-ray and neutron diffraction journal, November 2013

Direct imaging of the structural domains in the iron pnictides A Fe 2 As 2 ( A = Ca , Sr , Ba ) journal, May 2009

What drives nematic order in iron-based superconductors? journal, January 2014

High-temperature superconductivity in iron pnictides and chalcogenides journal, March 2016

Theory of electron nematic order in LaFeAsO journal, June 2008

In-Plane Resistivity Anisotropy in an Underdoped Iron Arsenide Superconductor journal, August 2010

Preemptive nematic order, pseudogap, and orbital order in the iron pnictides journal, January 2012

New layered chromium chalcogenides CsLiCrSe 2 , RbLiCrS 2 and CsLiCrS 2 : structures and properties journal, January 2019

Strain-Induced Spin-Nematic State and Nematic Susceptibility Arising from 2 × 2 Fe Clusters in KFe 0.8 Ag 1.2 Te 2 journal, December 2019

Title: Intertwined Magnetic and Nematic Orders in Semiconducting ${KFe}_{0.8} {Ag}_{1.2} {Te}_{2}$

Symmetry-breaking orbital anisotropy observed for detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
journal, April 2011

Ising and spin orders in the iron-based superconductors
journal, July 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

Nematic State of Pnictides Stabilized by Interplay between Spin, Orbital, and Lattice Degrees of Freedom
journal, July 2013

Structure Evolution and Spin-Glass Transition of Layered Compounds ALiFeSe ₂ (A = Na, K, Rb)
journal, October 2017

WinGX and ORTEP for Windows : an update
journal, July 2012

Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
journal, July 2012

Magnetic order in ${BaMn}_{2} {As}_{2}$ from neutron diffraction measurements
journal, September 2009

Spin Reorientation in ${TlFe}_{1.6} {Se}_{2}$ with Complete Vacancy Ordering
journal, August 2012

Local breaking of fourfold rotational symmetry by short-range magnetic order in heavily overdoped $Ba ({Fe}_{1 - x} {Cu}_{x})_{2} {As}_{2}$
journal, October 2017

Antiferromagnetism in semiconducting KFe $_{0.85}$ Ag $_{1.15}$ Te $_{2}$ single crystals
journal, August 2011

A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides
journal, March 2014

Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors
journal, December 2009

Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993

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

Four-circle single-crystal neutron diffractometer at the High Flux Isotope Reactor
journal, May 2011

Antiferromagnetic order and superlattice structure in nonsuperconducting and superconducting Rb $_{y}$ Fe $_{1.6 + x}$ Se $_{2}$
journal, September 2011

Divergent Nematic Susceptibility in an Iron Arsenide Superconductor
journal, August 2012

Neutron-Diffraction Measurements of an Antiferromagnetic Semiconducting Phase in the Vicinity of the High-Temperature Superconducting State of $K_{x} {Fe}_{2 - y} {Se}_{2}$
journal, December 2012

Superconductivity in iron compounds
journal, December 2011

Iron displacements and magnetoelastic coupling in the antiferromagnetic spin-ladder compound BaFe $_{2}$ Se $_{3}$
journal, November 2011

A Mott insulator continuously connected to iron pnictide superconductors
journal, December 2016

Electronic structure of the iron chalcogenide KFeAgTe $_{2}$ revealed by angle-resolved photoemission spectroscopy
journal, October 2013

Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
journal, May 2016

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

Gap symmetry and structure of Fe-based superconductors
journal, October 2011

A Transition from Localized to Strongly Correlated Electron Behavior and Mixed Valence Driven by Physical or Chemical Pressure in ACo ₂ As ₂ (A = Eu and Ca)
journal, February 2016

Unconventional superconductivity in Ba0.6K0.4Fe2As2 from inelastic neutron scattering
journal, December 2008

Antiferromagnetic order and spin dynamics in iron-based superconductors
journal, August 2015

Superconductivity gets an iron boost
journal, March 2010

Stripelike magnetism in a mixed-valence insulating state of the Fe-based ladder compound CsFe $_{2}$ Se $_{3}$
journal, June 2012

A short history of SHELX
journal, December 2007

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

Mott localization in a pure stripe antiferromagnet ${Rb}_{1 - δ} {Fe}_{1.5 - σ} S_{2}$
journal, September 2015

Unusual phase transitions and magnetoelastic coupling in TlFe $_{1.6}$ Se $_{2}$ single crystals
journal, June 2011

Evolution of the nuclear and magnetic structures of TlFe $_{1.6}$ Se $_{2}$ with temperature
journal, February 2012

Common Crystalline and Magnetic Structure of Superconducting $A_{2} {Fe}_{4} {Se}_{5}$ ( $A = K, Rb, Cs, Tl$ ) Single Crystals Measured Using Neutron Diffraction
journal, September 2011

KFeCuTe ₂ : a new compound to study the removal of interstitial Fe in layered tellurides
journal, January 2017

Spin glass in semiconducting ${KFe}_{1.05} {Ag}_{0.88} {Te}_{2}$ single crystals
journal, May 2015

A Novel Large Moment Antiferromagnetic Order in K _0.8 Fe _1.6 Se ₂ Superconductor
journal, August 2011

Strong interplay between stripe spin fluctuations, nematicity and superconductivity in FeSe
journal, December 2015

Cesium vacancy ordering in phase-separated $C s_{x} F e_{2 - y} S e_{2}$
journal, September 2015

Orbital ordering induces structural phase transition and the resistivity anomaly in iron pnictides
journal, December 2009

Crystal and magnetic structure of CaCo $_{1.86}$ As $_{2}$ studied by x-ray and neutron diffraction
journal, November 2013

Direct imaging of the structural domains in the iron pnictides $A {Fe}_{2} {As}_{2}$ $(A = Ca, Sr, Ba)$
journal, May 2009

What drives nematic order in iron-based superconductors?
journal, January 2014

High-temperature superconductivity in iron pnictides and chalcogenides
journal, March 2016

Theory of electron nematic order in LaFeAsO
journal, June 2008

In-Plane Resistivity Anisotropy in an Underdoped Iron Arsenide Superconductor
journal, August 2010

Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
journal, January 2012

New layered chromium chalcogenides CsLiCrSe 2 , RbLiCrS 2 and CsLiCrS 2 : structures and properties
journal, January 2019

Strain-Induced Spin-Nematic State and Nematic Susceptibility Arising from $2 \times 2$ Fe Clusters in ${KFe}_{0.8} {Ag}_{1.2} {Te}_{2}$
journal, December 2019