High-resolution ac-calorimetry studies on κ-(ET)2Cu(NCS)2: A strong-coupling superconductor with finite energy gap

J. Müller; M. Lang; R. Helfrich; F. Steglich; T. Sasaki

doi:10.1016/S0379-6779(02)00280-1

High-resolution ac-calorimetry studies on κ-(ET)₂Cu(NCS)₂: A strong-coupling superconductor with finite energy gap

J. Müller, M. Lang, R. Helfrich, F. Steglich, T. Sasaki

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Conference article › peer-review

Abstract

We report high-resolution heat capacity measurements on κ-(ET)₂Cu(NCS)₂ utilising an ac-modulation technique. The quasi-particle contribution to the specific heat in the superconducting state, C_es, can be well described by a strong-coupling BCS model implying an exponentially weak temperature dependence at T ≪ T_c. This result rules out an order parameter with zeroes on the Fermi surface.

Original language	English
Pages (from-to)	235-237
Number of pages	3
Journal	Synthetic Metals
Volume	133-134
DOIs	https://doi.org/10.1016/S0379-6779(02)00280-1
Publication status	Published - 2003 Mar 13
Event	ISCOM 2001 - Rusutsu, Hokkaido, Japan Duration: 2001 Sept 10 → 2001 Sept 14

Keywords

BEDT-TTF salt
Organic superconductors
Specific heat

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0379-6779(02)00280-1

Cite this

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title = "High-resolution ac-calorimetry studies on κ-(ET)2Cu(NCS)2: A strong-coupling superconductor with finite energy gap",

abstract = "We report high-resolution heat capacity measurements on κ-(ET)2Cu(NCS)2 utilising an ac-modulation technique. The quasi-particle contribution to the specific heat in the superconducting state, Ces, can be well described by a strong-coupling BCS model implying an exponentially weak temperature dependence at T ≪ Tc. This result rules out an order parameter with zeroes on the Fermi surface.",

keywords = "BEDT-TTF salt, Organic superconductors, Specific heat",

author = "J. M{\"u}ller and M. Lang and R. Helfrich and F. Steglich and T. Sasaki",

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language = "English",

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pages = "235--237",

journal = "Synthetic Metals",

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TY - JOUR

T1 - High-resolution ac-calorimetry studies on κ-(ET)2Cu(NCS)2

T2 - ISCOM 2001

AU - Müller, J.

AU - Lang, M.

AU - Helfrich, R.

AU - Steglich, F.

AU - Sasaki, T.

PY - 2003/3/13

Y1 - 2003/3/13

N2 - We report high-resolution heat capacity measurements on κ-(ET)2Cu(NCS)2 utilising an ac-modulation technique. The quasi-particle contribution to the specific heat in the superconducting state, Ces, can be well described by a strong-coupling BCS model implying an exponentially weak temperature dependence at T ≪ Tc. This result rules out an order parameter with zeroes on the Fermi surface.

AB - We report high-resolution heat capacity measurements on κ-(ET)2Cu(NCS)2 utilising an ac-modulation technique. The quasi-particle contribution to the specific heat in the superconducting state, Ces, can be well described by a strong-coupling BCS model implying an exponentially weak temperature dependence at T ≪ Tc. This result rules out an order parameter with zeroes on the Fermi surface.

KW - BEDT-TTF salt

KW - Organic superconductors

KW - Specific heat

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JO - Synthetic Metals

JF - Synthetic Metals

Y2 - 10 September 2001 through 14 September 2001

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