Time-reversal symmetry breaking and multigap superconductivity in the noncentrosymmetric superconductor 
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Arushi, .; Singh, Deepak; Hillier, A. D.; Scheurer, Mathias S.; Singh, R. P.

doi:10.1103/physrevb.103.174502

Cited by 23 publications

(10 citation statements)

References 81 publications

(140 reference statements)

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“…In noncentrosymmetric (NCS) superconductors, the absence of inversion symmetry in the crystal structure allows an antisymmetric spin-orbit interaction, and can lead to pairing states with a mixture of spin-singlet and spin-triplet components [20,21]. Multigap superconductivity can also be observed, for example in the TRS breaking alloy La 7 Ni 3 [22]. Other NCS binary lanthanides in this family, which include La 7 (Ir, Rh, Pd) 3 , also break TRS, but show a conventional, fully gapped s-wave pairing from transverse-field muon-spin rotation and heat capacity measurements [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

et al. 2022

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Elemental rhenium exhibiting type-II superconductivity has been previously reported to break time-reversal symmetry in the superconducting state. We have investigated an arc-melted sample of rhenium exhibiting type-I superconductivity. Low-temperature zero-field muon-spin relaxation measurements indicate that time-reversal symmetry is preserved in the superconducting state. Muon diffusion is observed, which is due to quantum mechanical tunneling between interstitial sites. The normal state behavior is characterized by the conduction electrons screening the muons and thermal broadening, and is typical for a metal. Energy asymmetries between muon trapping sites and the superconducting energy gap also characterize the superconducting state behavior.

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Section: Introductionmentioning

confidence: 99%

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

et al. 2022

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“…In noncentrosymmetric (NCS) superconductors, the absence of inversion symmetry in the crystal structure allows an antisymmetric spin-orbit interaction, and can lead to pairing states with a mixture of spin-singlet and spin-triplet components [20,21]. Multigap superconductivity can also be observed, for example in the TRS breaking alloy La 7 Ni 3 [22]. Other NCS binary lanthanides in this family, which include La 7 (Ir, Rh, Pd) 3 , also break TRS, but show a conventional, fully-gapped s-wave pairing from transverse-field muon-spin rotation and heat capacity measurements [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

Jonas,

Biswas,

Hillier

et al. 2022

Preprint

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Elemental rhenium exhibiting type-II superconductivity has been previously reported to break time-reversal symmetry in the superconducting state. We have investigated an arc-melted sample of rhenium exhibiting type-I superconductivity. Low temperature zero-field muon-spin relaxation measurements indicate that time-reversal symmetry is preserved in the superconducting state. Muon diffusion is observed, which is due to quantum mechanical tunneling between interstitial sites. The normal state behavior is characterized by the conduction electrons screening the muons and thermal broadening, and is typical for a metal. Energy asymmetries between muon trapping sites and the superconducting energy gap also characterize the superconducting state behavior.

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“…LaNiC 2 [24], Zr 3 Ir [25], and La 7 T M 3 (T M = Ni, Rh, Pd, Ir) [26][27][28][29]. In some of these NCSCs, the ASOC is rather weak, and there is evidence for fully gapped superconductivity (SC) similar to s-wave superconductors, and the origin of the TRS breaking is generally not yet well understood.…”

Section: Introductionmentioning

confidence: 99%

NbReSi: A Noncentrosymetric Superconductor with Large Upper Critical Field

Su,

Shang,

et al. 2021

Preprint

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We report the discovery of superconductivity in noncentrosymmetric NbReSi, which crystallizes in a hexagonal ZrNiAl-type crystal structure with space group P 62m (No. 189). Bulk superconductivity, with Tc = 6.5 K was characterized via electrical-resistivity, magnetization, and heat-capacity measurements. The low-temperature electronic specific heat suggests a fully gapped superconducting state in NbReSi, while a large upper critical field of µ0Hc2(0) ∼ 12.6 T is obtained, which is comparable to the weak-coupling Pauli limit. The electronic band-structure calculations show that the density of states at the Fermi level are dominated by Re and Nb d-orbitals, with a sizeable band splitting induced by the antisymmetric spin-orbit coupling. NbReSi represents another candidate material for revealing the puzzle of time-reversal symmetry breaking observed in some Re-based superconductors and its relation to the lack of inversion symmetry.

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Time-reversal symmetry breaking and multigap superconductivity in the noncentrosymmetric superconductor La7Ni3

Abstract: This is a copy of the published version, or version of record, available on the publisher's website. This version does not track changes, errata, or withdrawals on the publisher's site.

Cited by 23 publications

References 81 publications

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium

NbReSi: A Noncentrosymetric Superconductor with Large Upper Critical Field

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