Volume 121, Number 5, March 2018
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||09 May 2018|
Superconductivity in non-centrosymmetric sulfide YxS4
1 Materials Research Center for Element Strategy, Tokyo Institute of Technology - 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
2 Laboratory for Materials and Structures, Tokyo Institute of Technology - 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
Received: 23 December 2017
Accepted: 26 March 2018
We report the synthesis and characterization of the non-centrosymmetric superconductor YxS4 (x = 2.69, 2.75, 2.86, 2.96) using powder x-ray diffraction (XRD), magnetization, and transport measurements. It crystallized in a non-centrosymmetric Th3P4-type structure (space group , Z = 4). Resistivity and DC magnetization measurements confirmed that Y2.96S4 has type-II superconductivity with the transition temperature , lower critical field , and upper critical field . The experimental and density functional calculation results suggest that YxS4 could be categorized as a Bardeen-Cooper-Schrieffer (BCS) superconductor with intermediate coupling.
PACS: 74.70.Xa – Pnictides and chalcogenides / 74.25.N- – Response to electromagnetic fields / 74.25.-q – Properties of superconductors
© EPLA, 2018
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