Absence of Local Fluctuating Dimers in Superconducting Ir1-x(Pt,Rh)xTe2

Yu, Runze; Banerjee, S.; Lei, H. C.; Sinclair, Ryan; Abeykoon, M.; Zhou, H. D.; Petrovic, C.; Guguchia, Z.; Bozin, Emil S.

doi:10.1103/PhysRevB.97.174515

Title: Absence of Local Fluctuating Dimers in Superconducting Ir_1-x(Pt,Rh)_xTe₂

Journal Article · Fri May 18 00:00:00 EDT 2018 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.97.174515· OSTI ID:1436446

Yu, Runze ^[1]; Banerjee, S. ^[2]; Lei, H. C. ^[1]; Sinclair, Ryan ^[3]; Abeykoon, M. ^[4]; Zhou, H. D. ^[3]; Petrovic, C. ^[1]; Guguchia, Z. ^[5];

^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Directorate
Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Columbia Univ., New York, NY (United States). Dept. of Physics

The compound IrTe2 is known to exhibit a transition to a modulated state featuring Ir-Ir dimers, with large associated atomic displacements. Partial substitution of Pt or Rh for Ir destabilizes the modulated structure and induces superconductivity. It has been proposed that quantum critical dimer fluctuations might be associated with the superconductivity. Here we test for such local dimer correlations and demonstrate their absence. X-ray pair distribution function approach reveals that the local structure of Ir_0.95Pt_0.05Te₂ and Ir_0.8Rh_0.2Te₂ dichalcogenide superconductors with compositions just past the dimer/superconductor boundary is explained well by a dimer-free model down to 10 K, ruling out the possibility of there being nanoscale dimer fluctuations in this regime. This is inconsistent with the proposed quantum-critical-point-like interplay of the dimer state and superconductivity, and precludes scenarios for dimer fluctuations mediated superconducting pairing.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

Grant/Contract Number:: SC0012704; SC00112704; NSF-DMR-1350002

OSTI ID:: 1436446

Alternate ID(s):: OSTI ID: 1437682

Report Number(s):: BNL-203630-2018-JAAM; TRN: US1900185

Journal Information:: Physical Review B, Vol. 97, Issue 17; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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