Fully gapped superconductivity in centrosymmetric and noncentrosymmetric Re-B compounds probed with 
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Sharma, S.; Arushi, .; Motla, Kapil; Beare, J.; Nugent, M.; Pula, M.; Munsie, T. J. S.; Hillier, A. D.; Singh, R. P.; Luke, G. M.

doi:10.1103/physrevb.103.104507

Cited by 10 publications

(8 citation statements)

References 40 publications

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“…Note added. After the present manuscript was submitted, a related work by Sharma et al [66] appeared, in which similar compounds were studied via the μSR technique.…”

Section: Discussionmentioning

confidence: 99%

Multigap superconductivity in centrosymmetric and noncentrosymmetric rhenium-boron superconductors

et al. 2021

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“…Note added. After the present manuscript was submitted, a related work by Sharma et al [66] appeared, in which similar compounds were studied via the μSR technique.…”

Section: Discussionmentioning

confidence: 99%

Multigap superconductivity in centrosymmetric and noncentrosymmetric rhenium-boron superconductors

et al. 2021

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“…Such conclusion is further reinforced by the preserved TRS in many Re-based superconductors, whose Re-content is below a certain threshold. Such cases include, e.g., Re 3 W, Re 3 Ta, Re-Mo (with Mo-content higher than 12%) [25,27,55], the recently reported Re-B superconductors [88], and the diluted ReBe 22 superconductor [89]. Moreover, by comparing the ZF-µSR relaxation across various ReT superconductors, a clear positive correlation between ∆σ ZF (i.e., spontaneous fields) and the size of the nuclear magnetic moments µ n was identified [20].…”

Section: Time-reversal Symmetry Breakingmentioning

confidence: 99%

Time-Reversal Symmetry Breaking in Re-Based Superconductors: Recent Developments

Shang

Shiroka

2021

Front. Phys.

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In the recent search for unconventional- and topological superconductivity, noncentrosymmetric superconductors (NCSCs) rank among the most promising candidate materials. Surprisingly, some of them—especially those containing rhenium—seem to exhibit also time-reversal symmetry (TRS) breaking in their superconducting state, while TRS is preserved in many other isostructural NCSCs. To date, a satisfactory explanation for such discrepant behavior, albeit crucial for understanding the unconventional superconductivity of these materials, is still missing. Here we review the most recent developments regarding the Re-based class, where the muon-spin relaxation (μSR) technique plays a key role due to its high sensitivity to the weak internal fields associated with the TRS breaking phenomenon. We discuss different cases of Re-containing superconductors, comprising both centrosymmetric- and noncentrosymmetric crystal structures, ranging from pure rhenium, to ReT (T = 3d-5d early transition metals), to the dilute-Re case of ReBe22. μSR results suggest that the rhenium presence and its amount are two key factors for the appearance and the extent of TRS breaking in Re-based superconductors. Besides summarizing the existing findings, we also put forward future research ideas regarding the exciting field of materials showing TRS breaking.

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“…Note. While preparing the current manuscript, we became aware of a related work by S. Sharma et al [66], in which similar compounds were studied via the µSR technique. source, and thank the scientists of Dolly µSR spectrometer for their support.…”

Section: Discussionmentioning

confidence: 99%

Nodeless superconductivity in the centro- and noncentrosymmetric rhenium-boron superconductors

Shang,

Xie,

Zhao

et al. 2021

Preprint

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We report a comprehensive study of the centrosymmetric Re 3 B and noncentrosymmetric Re 7 B 3 superconductors. At a macroscopic level, their bulk superconductivity (SC), with T c = 5.1 K (Re 3 B) and 3.3 K (Re 7 B 3 ), was characterized via electrical-resistivity, magnetization, and heat-capacity measurements, while their microscopic superconducting properties were investigated by means of muon-spin rotation/relaxation (µSR). In both Re 3 B and Re 7 B 3 the low-T zero-field electronic specific heat and the superfluid density (determined via tranverse-field µSR) suggest a nodeless SC. Both compounds exhibit some features of multigap SC, as evidenced by temperature-dependent upper critical fields H c2 (T ), as well as by electronic band-structure calculations. The absence of spontaneous magnetic fields below the onset of SC, as determined from zerofield µSR measurements, indicates a preserved time-reversal symmetry in the superconducting state of both Re 3 B and Re 7 B 3 . Our results suggest that a lack of inversion symmetry and the accompanying antisymmetric spin-orbit coupling effects are not essential for the occurrence of multigap SC in these rhenium-boron compounds.

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Fully gapped superconductivity in centrosymmetric and noncentrosymmetric Re-B compounds probed with μSR

Cited by 10 publications

References 40 publications

Multigap superconductivity in centrosymmetric and noncentrosymmetric rhenium-boron superconductors

Multigap superconductivity in centrosymmetric and noncentrosymmetric rhenium-boron superconductors

Time-Reversal Symmetry Breaking in Re-Based Superconductors: Recent Developments

Nodeless superconductivity in the centro- and noncentrosymmetric rhenium-boron superconductors

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