Bandwidth and Electron Correlation-Tuned Superconductivity in Rb0.8Fe2(Se1-zSz)2

Yi, M.; Wang, Meng; Kemper, A. F.; Mo, S. -K.; Hussain, Z.; Bourret-Courchesne, E.; Lanzara, A.; Hashimoto, M.; Lu, D. H.; Shen, Z. -X.; Birgeneau, R. J.

doi:10.1103/PhysRevLett.115.256403

Title: Bandwidth and Electron Correlation-Tuned Superconductivity in ${Rb}_{0.8} {Fe}_{2} ({Se}_{1 - z} S_{z})_{2}$

Journal Article · Tue Dec 15 00:00:00 EST 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.256403· OSTI ID:1393002

Yi, M. ^[1]; Wang, Meng ^[1]; Kemper, A. F. ^[2]; Mo, S. -K. ^[3]; Hussain, Z. ^[3]; Bourret-Courchesne, E. ^[4]; Lanzara, A. ^[5]; Hashimoto, M. ^[6]; Lu, D. H. ^[6]; Shen, Z. -X. ^[7]; Birgeneau, R. J. ^[8]

Univ. of California, Berkeley, CA (United States). Dept. of Physics
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Computational Research Division
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials, Dept. of Physics and Applied Physics
Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering

Here, we present a systematic angle-resolved photoemission spectroscopy study of the substitution dependence of the electronic structure of Rb_0.8Fe₂(Se_1-zS_z)₂ (z = 0, 0.5, 1), where superconductivity is continuously suppressed into a metallic phase. Going from the nonsuperconducting Rb_0.8Fe₂S₂ to superconducting Rb_0.8Fe₂Se₂, we observe little change of the Fermi surface topology, but a reduction of the overall bandwidth by a factor of 2. Hence, for these heavily electron-doped iron chalcogenides, we have identified electron correlation as explicitly manifested in the quasiparticle bandwidth to be the important tuning parameter for superconductivity, and that moderate correlation is essential to achieving high T_C.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

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

Grant/Contract Number:: AC02-05CH11231; AC03-76SF008

OSTI ID:: 1393002

Alternate ID(s):: OSTI ID: 1229909

Journal Information:: Physical Review Letters, Vol. 115, Issue 25; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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Cited By (5)

Iron-Based Chalcogenide Spin Ladder BaFe2X3 (X = Se,S) Wu, Shan; Frandsen, Benjamin A.; Wang, Meng Journal of Superconductivity and Novel Magnetism, Vol. 33, Issue 1 https://doi.org/10.1007/s10948-019-05304-4	journal	November 2019
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
Transition from Sign-Reversed to Sign-Preserved Cooper-Pairing Symmetry in Sulfur-Doped Iron Selenide Superconductors Wang, Qisi; Park, J. T.; Feng, Yu Physical Review Letters, Vol. 116, Issue 19 https://doi.org/10.1103/physrevlett.116.197004	journal	May 2016
High Temperature Superconductivity in Iron Pnictides and Chalcogenides Si, Qimiao; Yu, Rong; Abrahams, Elihu arXiv https://doi.org/10.48550/arxiv.1604.03566	text	January 2016
Transition from sign-reversed to sign-preserved Cooper-pairing symmetry in sulfur-doped iron selenide superconductors Wang, Qisi; Park, J. T.; Feng, Yu arXiv https://doi.org/10.48550/arxiv.1604.06222	text	January 2016

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