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Experimental signatures of nodeless multiband superconductivity in a 2H-Pd0.08TaSe2 single crystal

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Title
Experimental signatures of nodeless multiband superconductivity in a 2H-Pd0.08TaSe2 single crystal
Author(s)
Kim, Chanhee; Bhoi, Dilip; Sur, Yeahan; Jeon, Byung-Gu; Wulferding, Dietrich; Min, Byeong Hun; Kim, Jeehoon; Kim, Kee Hoon
Publication Date
2021-06
Journal
SCIENTIFIC REPORTS, v.11, no.1
Publisher
NATURE RESEARCH
Abstract
In order to understand the superconducting gap nature of a 2H-Pd0.08TaSe2 single crystal with Tc=3.13K, in-plane thermal conductivity kappa, in-plane London penetration depth lambda L, and the upper critical fields Hc2 have been investigated. At zero magnetic field, it is found that no residual linear term kappa 0/T exists and lambda L follows a power-law Tn (T: temperature) with n = 2.66 at T <= Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of kappa 0/T clearly shows a shoulder-like feature at a low field region. The temperature dependent Hc2 curves for both in-plane and out-of-plane field directions exhibit clear upward curvatures near Tc, consistent with the shape predicted by the two-band theory and the anisotropy ratio between the Hc2(T) curves exhibits strong temperature-dependence. All these results coherently suggest that 2H-Pd0.08TaSe2 is a nodeless, multiband superconductor.
URI
https://pr.ibs.re.kr/handle/8788114/10607
DOI
10.1038/s41598-021-92709-8
ISSN
2045-2322
Appears in Collections:
HiddenCommunity > 1. Journal Papers (저널논문)
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