Mott localization in a pure stripe antiferromagnet Rb1-δFe1.5-σS2

Wang, Meng; Yi, Ming; Cao, Huibo; de la Cruz, C.; Mo, S. K.; Huang, Q. Z.; Bourret-Courchesne, E.; Dai, Pengcheng; Lee, D. H.; Shen, Z. X.; Birgeneau, R. J.

doi:10.1103/PhysRevB.92.121101

Title: Mott localization in a pure stripe antiferromagnet ${Rb}_{1 - δ} {Fe}_{1.5 - σ} S_{2}$

Journal Article · Tue Sep 01 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.121101· OSTI ID:1260557

Wang, Meng; Yi, Ming; Cao, Huibo; de la Cruz, C.; Mo, S. K.; Huang, Q. Z.; Bourret-Courchesne, E.; Dai, Pengcheng; Lee, D. H.; Shen, Z. X.; Birgeneau, R. J.

A combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements on a pure antiferromagnetic stripe Rb_1-δFe_1.5-σS₂ is reported. A neutron diffraction experiment on a powder sample shows that a 98% volume fraction of the sample is in the antiferromagnetic stripe phase with rhombic iron vacancy order and a refined composition of Rb_0.66Fe_1.36S₂, and that only 2% of the sample is in the block antiferromagnetic phase with √5×√5 iron vacancy order. Furthermore, a neutron diffraction experiment on a single crystal shows that there is only a single phase with the stripe antiferromagnetic order with the refined composition of Rb_0.78Fe_1.35S₂, while the phase with block antiferromagnetic order is absent. Angle-resolved photoemission spectroscopy measurements on the same crystal with the pure stripe phase reveal that the electronic structure is gapped at the Fermi level with a gap larger than 0.325 eV. The data collectively demonstrate that the extra 10% iron vacancies in addition to the rhombic iron vacancy order effectively impede the formation of the block antiferromagnetic phase; the data also suggest that the stripe antiferromagnetic phase with rhombic iron vacancy order is a Mott insulator.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

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

DOE Contract Number:: AC02-05CH11231; AC03-76SF008; SC0012311; AC02-76SF00515

OSTI ID:: 1260557

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 12; ISSN 1098-0121

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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Spin waves and spatially anisotropic exchange interactions in the $S = 2$ stripe antiferromagnet ${Rb}_{0.8} {Fe}_{1.5} S_{2}$ Wang, Meng; Valdivia, P.; Yi, Ming Physical Review B, Vol. 92, Issue 4 https://doi.org/10.1103/physrevb.92.041109	journal	July 2015
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Unconventional Superconductivity with a Sign Reversal in the Order Parameter of ${LaFeAsO}_{1 - x} F_{x}$ Mazin, I. I.; Singh, D. J.; Johannes, M. D. Physical Review Letters, Vol. 101, Issue 5 https://doi.org/10.1103/PhysRevLett.101.057003	journal	July 2008
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Electronic Identification of the Parental Phases and Mesoscopic Phase Separation of $K_{x} {Fe}_{2 - y} {Se}_{2}$ Superconductors Chen, F.; Xu, M.; Ge, Q. Q. Physical Review X, Vol. 1, Issue 2 https://doi.org/10.1103/PhysRevX.1.021020	journal	December 2011
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Antiferromagnetic order and superlattice structure in nonsuperconducting and superconducting Rb $_{y}$ Fe $_{1.6 + x}$ Se $_{2}$ Wang, Meng; Wang, Miaoyin; Li, G. N. Physical Review B, Vol. 84, Issue 9 https://doi.org/10.1103/PhysRevB.84.094504	journal	September 2011
Neutron-Diffraction Measurements of an Antiferromagnetic Semiconducting Phase in the Vicinity of the High-Temperature Superconducting State of $K_{x} {Fe}_{2 - y} {Se}_{2}$ Zhao, Jun; Cao, Huibo; Bourret-Courchesne, E. Physical Review Letters, Vol. 109, Issue 26 https://doi.org/10.1103/PhysRevLett.109.267003	journal	December 2012
Two spatially separated phases in semiconducting ${Rb}_{0.8} {Fe}_{1.5} S_{2}$ Wang, Meng; Tian, Wei; Valdivia, P. Physical Review B, Vol. 90, Issue 12 https://doi.org/10.1103/PhysRevB.90.125148	journal	September 2014
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Spin waves and spatially anisotropic exchange interactions in the $S = 2$ stripe antiferromagnet ${Rb}_{0.8} {Fe}_{1.5} S_{2}$ Wang, Meng; Valdivia, P.; Yi, Ming Physical Review B, Vol. 92, Issue 4 https://doi.org/10.1103/PhysRevB.92.041109	journal	July 2015
Electronic Structures and Magnetic Order of Ordered-Fe-Vacancy Ternary Iron Selenides ${TlFe}_{1.5} {Se}_{2}$ and $A {Fe}_{1.5} {Se}_{2}$ ( $A = K$ , Rb, or Cs) Yan, Xun-Wang; Gao, Miao; Lu, Zhong-Yi Physical Review Letters, Vol. 106, Issue 8 https://doi.org/10.1103/PhysRevLett.106.087005	journal	February 2011
Mott Transition in Modulated Lattices and Parent Insulator of $(K, Tl)_{y} {Fe}_{x} {Se}_{2}$ Superconductors Yu, Rong; Zhu, Jian-Xin; Si, Qimiao Physical Review Letters, Vol. 106, Issue 18 https://doi.org/10.1103/PhysRevLett.106.186401	journal	May 2011
Electronic structure and Mott localization of iron-deficient TlFe $_{1.5}$ Se $_{2}$ with superstructures Cao, Chao; Dai, Jianhui Physical Review B, Vol. 83, Issue 19 https://doi.org/10.1103/PhysRevB.83.193104	journal	May 2011
Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in $A_{x} {Fe}_{2 − y} {Se}_{2}$ ( $A = K$ , Rb) Superconductors Yi, M.; Lu, D. H.; Yu, R. Physical Review Letters, Vol. 110, Issue 6 https://doi.org/10.1103/PhysRevLett.110.067003	journal	February 2013
Pressure-Driven Quantum Criticality in Iron-Selenide Superconductors Guo, Jing; Chen, Xiao-Jia; Dai, Jianhui Physical Review Letters, Vol. 108, Issue 19 https://doi.org/10.1103/PhysRevLett.108.197001	journal	May 2012
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
NMR Study in the Iron-Selenide ${Rb}_{0.74} {Fe}_{1.6} {Se}_{2}$ : Determination of the Superconducting Phase as Iron Vacancy-Free ${Rb}_{0.3} {Fe}_{2} {Se}_{2}$ Texier, Y.; Deisenhofer, J.; Tsurkan, V. Physical Review Letters, Vol. 108, Issue 23 https://doi.org/10.1103/PhysRevLett.108.237002	journal	June 2012
Phase relations in K $_{x}$ Fe $_{2 - y}$ Se $_{2}$ and the structure of superconducting K $_{x}$ Fe $_{2}$ Se $_{2}$ via high-resolution synchrotron diffraction Shoemaker, Daniel P.; Chung, Duck Young; Claus, Helmut Physical Review B, Vol. 86, Issue 18 https://doi.org/10.1103/PhysRevB.86.184511	journal	November 2012
Structure and composition of the superconducting phase in alkali iron selenide $K_{y} {Fe}_{1.6 + x} {Se}_{2}$ Carr, Scott V.; Louca, Despina; Siewenie, Joan Physical Review B, Vol. 89, Issue 13 https://doi.org/10.1103/PhysRevB.89.134509	journal	April 2014
Identification of Various Coexisting Phases in Superconducting and Non-superconducting Samples of Rb _x Fe ₂₋ _y Se ₂ Kobayashi, Yoshiaki; Kototani, Shohei; Ohishi, Kazuki Journal of the Physical Society of Japan, Vol. 84, Issue 4 https://doi.org/10.7566/JPSJ.84.044710	journal	April 2015
Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor withTc= 27 K Krzton-Maziopa, A.; Shermadini, Z.; Pomjakushina, E. Institute of Physics Publishing https://doi.org/10.5167/uzh-50800	text	January 2011
Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide Yeh, Kuo-Wei; Huang, Tzu-Wen; Huang, Yi-Lin arXiv https://doi.org/10.48550/arxiv.0808.0474	text	January 2008
Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K Krzton-Maziopa, A.; Shermadini, Z.; Pomjakushina, E. arXiv https://doi.org/10.48550/arxiv.1012.3637	text	January 2010
Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3 Wang, Qing-Yan; Li, Zhi; Zhang, Wen-Hao arXiv https://doi.org/10.48550/arxiv.1201.5694	text	January 2012
Enhancement of superconducting transition temperature of FeSe by intercalation of a molecular spacer layer Burrard-Lucas, Matthew; Free, David G.; Sedlmaier, Stefan J. arXiv https://doi.org/10.48550/arxiv.1203.5046	text	January 2012

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