Journal
PHYSICAL REVIEW B
Volume 106, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.L020504
Keywords
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Funding
- Science and Engineering Research Board, Government of India [CRG/2019/001028]
- Department of Science and Technology, India [SR/NM/Z-07/2015]
- University Grant Commission (UGC) of Government of India
- DST-FIST
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We have studied the electronic properties of ScS, a transition-metal monochalcogenide, and confirmed its bulk superconductivity. The presence of spontaneous static or quasistatic magnetic fields in the superconducting state suggests that ScS may be a candidate material for unconventional superconductivity.
We have studied the electronic properties of ScS, a transition-metal monochalcogenide with a rocksalt crystal structure, using magnetization, specific heat, transport, and muon spin rotation/relaxation (mu SR) measurements. All measurements confirm the bulk superconductivity in ScS with a transition temperature of T-C = 5.1(5) K. Specific heat together with transverse-field mu SR measurements indicate a full gap, while our zero-field mu SR study reveals the presence of spontaneous static or quasistatic magnetic fields emerging when entering the superconducting state. We discuss various possible microscopic origins of the observed time-reversal symmetry breaking. As none of them can be readily reconciled with a conventional pairing mechanism, this introduces ScS as a candidate material for unconventional superconductivity.
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