Time-reversal symmetry breaking and 
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 superconductivity in 
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Anand, V. K.; Bhattacharyya, A.; Adroja, D. T.; Panda, K.; Biswas, P. K.; Hillier, A. D.; Lake, B.

doi:10.1103/physrevb.108.224519

Phys. Rev. B

2023

DOI: 10.1103/physrevb.108.224519

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Time-reversal symmetry breaking and s−wave superconductivity in CaPd2Ge2 : A μSR

V. K. Anand,

A. Bhattacharyya,

D. T. Adroja

et al.

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2024

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Cited by 3 publications

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Probing the superconducting gap structure of ScRuSi via μSR and first-principles calculations

Panda,

Bhattacharyya,

Ferreira

et al. 2024

Phys. Rev. B

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Probing the superconducting gap structure of ScRuSi via μSR and first-principles calculations

Panda,

Bhattacharyya,

Ferreira

et al. 2024

Phys. Rev. B

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Time-reversal symmetry breaking in the s -wave superconductor CaPd2As2 probed by μSR

Aarti,

Panda,

Adroja

et al. 2024

Phys. Rev. B

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Spontaneous time-reversal symmetry breaking by disorder in superconductors

Andersen,

Kreisel,

Hirschfeld

2024

Front. Phys.

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A growing number of superconducting materials display evidence for spontaneous time-reversal symmetry breaking (TRSB) below their critical transition temperatures. Precisely what this implies for the nature of the superconducting ground state of such materials, however, is often not straightforward to infer. We review the experimental status and survey different theoretical mechanisms for the generation of TRSB in superconductors. In cases where a TRSB complex combination of two superconducting order parameter components is realized, defects, dislocations and sample edges may generate superflow patterns that can be picked up by magnetic probes. However, even single-component condensates that do not break time-reversal symmetry in their pure bulk phases can also support signatures of magnetism inside the superconducting state. This includes, for example, the generation of localized orbital current patterns or spin-polarization near atomic-scale impurities, twin boundaries and other defects. Signals of TRSB may also arise from a superconductivity-enhanced Ruderman-Kittel-Kasuya-Yosida exchange coupling between magnetic impurity moments present in the normal state. We discuss the relevance of these different mechanisms for TRSB in light of recent experiments on superconducting materials of current interest.

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Time-reversal symmetry breaking and s−wave superconductivity in CaPd2Ge2 : A μSR

Cited by 3 publications

References 48 publications

Probing the superconducting gap structure of ScRuSi via μSR and first-principles calculations

Probing the superconducting gap structure of ScRuSi via μSR and first-principles calculations

Time-reversal symmetry breaking in the s -wave superconductor CaPd2As2 probed by μSR

Spontaneous time-reversal symmetry breaking by disorder in superconductors

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