Journal
PHYSICAL REVIEW B
Volume 103, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.024507
Keywords
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Funding
- EPSRC, United Kingdom [EP/T005963/1, EP/M028771/1]
- EPSRC [EP/T005963/1, EP/M028771/1] Funding Source: UKRI
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The study presents evidence of time-reversal symmetry breaking (TRSB) and Bardeen-Cooper-Schrieffer (BCS)-like superconductivity in noncentrosymmetric La7Pd3, suggesting implications for other CS and NCS superconductors where TRSB has been observed.
Time-reversal symmetry breaking (TRSB) with a Bardeen-Cooper-Schrieffer (BCS)-like superconductivity occurs in a small, but growing number of noncentrosymmetric (NCS) materials, although the mechanism is poorly understood. We present heat capacity, magnetization, resistivity, and muon spin resonance/relaxation (mu SR) measurements on polycrystalline samples of NCS La7Pd3. Transverse-field mu SR and heat capacity data show La7Pd3 is a type-II superconductor with a BCS-like gap structure, while zero-field mu SR results provide evidence of TRSB. We discuss the implications of these results for both the La7X3 (where X = Ni, Pd, Rh, Ir) group of superconductors and other CS and NCS superconductors for which TRSB has been observed.
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