Tunneling break-junction measurements of the superconducting gap in Y 2C3

T. Ekino; A. Sugimoto; A. M. Gabovich; H. Kinoshita; J. Akimitsu

doi:10.1016/j.physc.2012.03.044

Tunneling break-junction measurements of the superconducting gap in Y ₂C₃

T. Ekino, A. Sugimoto, A. M. Gabovich, H. Kinoshita, J. Akimitsu

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

6 Citations (Scopus)

Abstract

Tunneling measurements of the electron spectrum in the superconducting state have been carried out in Y₂C₃ samples with the bulk (resistive and diamagnetic) critical temperature T_c = 15-16 K. A break-junction technique was crucial to find the intrinsic gap features. The representative gap structure at 4 K reveals distinct BCS-like peaks with the gap value of 2Δ(4 K) = 3-4 meV. Assuming local T_c values of 10-13 K, the characteristic gap to T_c ratio 2Δ/k_BT _c (k_B is the Boltzmann constant) was found to possess the BCS weak-coupling value 3.5 ± 0.2, appropriate to isotropic s-wave superconductors.

Original language	English
Pages (from-to)	52-55
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	484
DOIs	https://doi.org/10.1016/j.physc.2012.03.044
Publication status	Published - Jan 15 2013
Externally published	Yes

Keywords

Break junction
Superconducting energy gap
Tunneling
YC

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2012.03.044

Cite this

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title = "Tunneling break-junction measurements of the superconducting gap in Y 2C3",

abstract = "Tunneling measurements of the electron spectrum in the superconducting state have been carried out in Y2C3 samples with the bulk (resistive and diamagnetic) critical temperature Tc = 15-16 K. A break-junction technique was crucial to find the intrinsic gap features. The representative gap structure at 4 K reveals distinct BCS-like peaks with the gap value of 2Δ(4 K) = 3-4 meV. Assuming local Tc values of 10-13 K, the characteristic gap to Tc ratio 2Δ/kBT c (kB is the Boltzmann constant) was found to possess the BCS weak-coupling value 3.5 ± 0.2, appropriate to isotropic s-wave superconductors.",

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T1 - Tunneling break-junction measurements of the superconducting gap in Y 2C3

AU - Ekino, T.

AU - Sugimoto, A.

AU - Gabovich, A. M.

AU - Kinoshita, H.

AU - Akimitsu, J.

PY - 2013/1/15

Y1 - 2013/1/15

N2 - Tunneling measurements of the electron spectrum in the superconducting state have been carried out in Y2C3 samples with the bulk (resistive and diamagnetic) critical temperature Tc = 15-16 K. A break-junction technique was crucial to find the intrinsic gap features. The representative gap structure at 4 K reveals distinct BCS-like peaks with the gap value of 2Δ(4 K) = 3-4 meV. Assuming local Tc values of 10-13 K, the characteristic gap to Tc ratio 2Δ/kBT c (kB is the Boltzmann constant) was found to possess the BCS weak-coupling value 3.5 ± 0.2, appropriate to isotropic s-wave superconductors.

AB - Tunneling measurements of the electron spectrum in the superconducting state have been carried out in Y2C3 samples with the bulk (resistive and diamagnetic) critical temperature Tc = 15-16 K. A break-junction technique was crucial to find the intrinsic gap features. The representative gap structure at 4 K reveals distinct BCS-like peaks with the gap value of 2Δ(4 K) = 3-4 meV. Assuming local Tc values of 10-13 K, the characteristic gap to Tc ratio 2Δ/kBT c (kB is the Boltzmann constant) was found to possess the BCS weak-coupling value 3.5 ± 0.2, appropriate to isotropic s-wave superconductors.

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KW - Superconducting energy gap

KW - Tunneling

KW - YC

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