Experimental signatures of nodeless multiband superconductivity in a 2H-Pd 0.08TaSe 2 single crystal

Chanhee Kim; Dilip Bhoi; Yeahan Sur; Byung Gu Jeon; Dirk Wulferding; Byeong Hun Min; Jeehoon Kim; Kee Hoon Kim

doi:10.1038/s41598-021-92709-8

Experimental signatures of nodeless multiband superconductivity in a 2H-Pd _0.08TaSe ₂ single crystal

Chanhee Kim
, Dilip Bhoi
, Yeahan Sur
, Byung Gu Jeon
, Dirk Wulferding
, Byeong Hun Min
, Jeehoon Kim
, Kee Hoon Kim

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

In order to understand the superconducting gap nature of a 2H-Pd _0.08TaSe ₂ single crystal with Tc=3.13K, in-plane thermal conductivity κ, in-plane London penetration depth λ_L, and the upper critical fields H_c₂ have been investigated. At zero magnetic field, it is found that no residual linear term κ/ T exists and λ_L follows a power-law Tⁿ (T: temperature) with n = 2.66 at T≤13Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of κ/T clearly shows a shoulder-like feature at a low field region. The temperature dependent H_c₂ curves for both in-plane and out-of-plane field directions exhibit clear upward curvatures near T_c, consistent with the shape predicted by the two-band theory and the anisotropy ratio between the H_c₂(T) curves exhibits strong temperature-dependence. All these results coherently suggest that 2H-Pd _0.08TaSe ₂ is a nodeless, multiband superconductor.

Original language	English
Article number	13383
Journal	Scientific Reports
Volume	11
Issue number	1
DOIs	https://doi.org/10.1038/s41598-021-92709-8
State	Published - Dec 2021
Externally published	Yes

Funding

This work was financially supported by Grant nos. 2019R1A2C2090648, 2019M3E4A1080227 and 2016K1A4A3914691 through the National Research Foundation (NRF) of Korea funded by the Korean government. D. Wulferding is supported by Institute for Basic Science (IBS), Grant No. IBS-R014-D1.

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title = "Experimental signatures of nodeless multiband superconductivity in a 2H-Pd 0.08TaSe 2 single crystal",

abstract = "In order to understand the superconducting gap nature of a 2H-Pd 0.08TaSe 2 single crystal with Tc=3.13K, in-plane thermal conductivity κ, in-plane London penetration depth λL, and the upper critical fields Hc2 have been investigated. At zero magnetic field, it is found that no residual linear term κ/ T exists and λL follows a power-law Tn (T: temperature) with n = 2.66 at T≤13Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of κ/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-Pd 0.08TaSe 2 is a nodeless, multiband superconductor.",

author = "Chanhee Kim and Dilip Bhoi and Yeahan Sur and Jeon, \{Byung Gu\} and Dirk Wulferding and Min, \{Byeong Hun\} and Jeehoon Kim and Kim, \{Kee Hoon\}",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

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doi = "10.1038/s41598-021-92709-8",

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AU - Kim, Chanhee

AU - Bhoi, Dilip

AU - Sur, Yeahan

AU - Jeon, Byung Gu

AU - Wulferding, Dirk

AU - Min, Byeong Hun

AU - Kim, Jeehoon

AU - Kim, Kee Hoon

PY - 2021/12

Y1 - 2021/12

N2 - In order to understand the superconducting gap nature of a 2H-Pd 0.08TaSe 2 single crystal with Tc=3.13K, in-plane thermal conductivity κ, in-plane London penetration depth λL, and the upper critical fields Hc2 have been investigated. At zero magnetic field, it is found that no residual linear term κ/ T exists and λL follows a power-law Tn (T: temperature) with n = 2.66 at T≤13Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of κ/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-Pd 0.08TaSe 2 is a nodeless, multiband superconductor.

AB - In order to understand the superconducting gap nature of a 2H-Pd 0.08TaSe 2 single crystal with Tc=3.13K, in-plane thermal conductivity κ, in-plane London penetration depth λL, and the upper critical fields Hc2 have been investigated. At zero magnetic field, it is found that no residual linear term κ/ T exists and λL follows a power-law Tn (T: temperature) with n = 2.66 at T≤13Tc, supporting nodeless superconductivity. Moreover, the magnetic-field dependence of κ/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-Pd 0.08TaSe 2 is a nodeless, multiband superconductor.

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DO - 10.1038/s41598-021-92709-8

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SN - 2045-2322

VL - 11

JO - Scientific Reports

JF - Scientific Reports

IS - 1

M1 - 13383

ER -

Experimental signatures of nodeless multiband superconductivity in a 2H-Pd _0.08TaSe ₂ single crystal

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