Low-energy inelastic response in the superconducting phases of PrOs4Sb12

Setty, Chandan; Wang, Yuxuan; Phillips, Philip W.

doi:10.1103/physrevb.96.054508

Title: Low-energy inelastic response in the superconducting phases of PrO_s₄Sb₁₂

Journal Article · Fri Aug 11 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.96.054508· OSTI ID:1469835

Setty, Chandan ^[1]; Wang, Yuxuan ^[1]; Phillips, Philip W. ^[1]

Univ. of Illinois at Urbana-Champaign, IL (United States)

Recent ac susceptibility and polar Kerr effect measurements in the skutterudite superconductor PrO_s₄Sb₁₂ (POS) uncovered the nature of the superconducting double transition from a high-temperature, high-field, time-reversal symmetric phase (or the A phase) to a low-temperature, low-field, time-reversal symmetry-broken phase (or the B phase). In this work, starting from a microscopic model, we derive a Ginzburg-Landau expansion relevant to POS that describes this entrance into the time-reversal symmetry-broken phase along the temperature axis. We also provide a study of the low-energy inelastic (Raman) response in both the A and B phases of POS, and seek additional signatures which could help reveal the exact form of the gap functions previously proposed in these phases. By appropriately manipulating the incoming and scattered light geometries, along with additional subtraction procedures and suitable assumptions, we show that one can access the various irreducible representations contained in the point group describing POS. We demonstrate how to use this technique on example order parameters proposed in POS. Depending on whether there exist nodes along the c axis, we find additional low-energy spectral weight within the superconducting gap in the $$E_g$$ geometry, a feature that could pinpoint the location of nodes on the Fermi surface.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation

Grant/Contract Number:: AC02-98CH10886; GBMF4305; AC0298CH1088

OSTI ID:: 1469835

Alternate ID(s):: OSTI ID: 1375258

Journal Information:: Physical Review B, Vol. 96, Issue 5; Related Information: CES partners with Brookhaven National Laboratory (BNL); Argonne National Laboratory; University of Illinois, Urbana-Champaign; Los Alamos National Laboratory; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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Title: Low-energy inelastic response in the superconducting phases of PrO_s₄Sb₁₂