Journal
PHYSICAL REVIEW B
Volume 95, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.224506
Keywords
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Canadian Foundation for Innovation
- Alexander Graham Bell Canada Graduate Scholarship program
- NSF [DMR-1610633, DMR-1436095, OISE-0968226]
- JAEA Reimei project
- Friends of Univ. of Tokyo Inc.
- Ministry of Science and Technology (MOST), Taiwan [103-2119-M-002-020-MY3]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1610633] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1436095] Funding Source: National Science Foundation
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We present muon spin rotation and relaxation (mu SR) measurements on the noncentrosymmetric superconductor PbTaSe2. Frommeasurements in an applied transverse field between H-c1 and H-c2, we extract the superfluid density as a function of temperature in the vortex state. These data can be fit with a fully gapped two-band model, consistent with previous evidence from ARPES, thermal conductivity, and resistivity. Furthermore, zero-field measurements show no evidence for a time-reversal symmetry-breaking field greater than 0.05 G in the superconducting state. This makes exotic fully gapped spin-triplet states unlikely, and hence we contend that PbTaSe2 is characterized by conventional BCS s-wave superconductivity in multiple bands.
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