Quantum vortex liquid state in the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

T. Sasaki; T. Fukuda; T. Nishizaki; T. Fujita; N. Yoneyama; N. Kobayashi

doi:10.1016/S0921-4534(02)02764-8

Quantum vortex liquid state in the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)₂Cu(NCS)₂

T. Sasaki, T. Fukuda, T. Nishizaki, T. Fujita, N. Yoneyama, N. Kobayashi

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

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

Abstract

We report the transport properties in the quantum vortex liquid (QVL) state of the layered organic superconductor κ-(BEDT-TTF)₂Cu(NCS)₂. A steep change of the resistivity in the vortex liquid state is observed below about 1 K. In the low resistance state at lower temperatures, finite resistivity persists at least down to 100 mK. The finite residual resistivity may result in QVL assisted by the strong quantum fluctuations. A non-ohmic behavior appears only in the low resistance state, but not in the thermal vortex liquid state at high temperatures. These transport properties are similar to the observations discussed as the vortex slush state in the high-T_c oxides.

Original language	English
Pages (from-to)	609-610
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02764-8
Publication status	Published - 2003 May 1
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

Non-ohmic resistivity
Organic superconductor
Quantum vortex liquid
κ-(BEDT-TTF)Cu(NCS)

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/S0921-4534(02)02764-8

Cite this

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title = "Quantum vortex liquid state in the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2",

abstract = "We report the transport properties in the quantum vortex liquid (QVL) state of the layered organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. A steep change of the resistivity in the vortex liquid state is observed below about 1 K. In the low resistance state at lower temperatures, finite resistivity persists at least down to 100 mK. The finite residual resistivity may result in QVL assisted by the strong quantum fluctuations. A non-ohmic behavior appears only in the low resistance state, but not in the thermal vortex liquid state at high temperatures. These transport properties are similar to the observations discussed as the vortex slush state in the high-Tc oxides.",

keywords = "Non-ohmic resistivity, Organic superconductor, Quantum vortex liquid, κ-(BEDT-TTF)Cu(NCS)",

author = "T. Sasaki and T. Fukuda and T. Nishizaki and T. Fujita and N. Yoneyama and N. Kobayashi",

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doi = "10.1016/S0921-4534(02)02764-8",

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pages = "609--610",

journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Quantum vortex liquid state in the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2

AU - Sasaki, T.

AU - Fukuda, T.

AU - Nishizaki, T.

AU - Fujita, T.

AU - Yoneyama, N.

AU - Kobayashi, N.

PY - 2003/5/1

Y1 - 2003/5/1

N2 - We report the transport properties in the quantum vortex liquid (QVL) state of the layered organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. A steep change of the resistivity in the vortex liquid state is observed below about 1 K. In the low resistance state at lower temperatures, finite resistivity persists at least down to 100 mK. The finite residual resistivity may result in QVL assisted by the strong quantum fluctuations. A non-ohmic behavior appears only in the low resistance state, but not in the thermal vortex liquid state at high temperatures. These transport properties are similar to the observations discussed as the vortex slush state in the high-Tc oxides.

AB - We report the transport properties in the quantum vortex liquid (QVL) state of the layered organic superconductor κ-(BEDT-TTF)2Cu(NCS)2. A steep change of the resistivity in the vortex liquid state is observed below about 1 K. In the low resistance state at lower temperatures, finite resistivity persists at least down to 100 mK. The finite residual resistivity may result in QVL assisted by the strong quantum fluctuations. A non-ohmic behavior appears only in the low resistance state, but not in the thermal vortex liquid state at high temperatures. These transport properties are similar to the observations discussed as the vortex slush state in the high-Tc oxides.

KW - Non-ohmic resistivity

KW - Organic superconductor

KW - Quantum vortex liquid

KW - κ-(BEDT-TTF)Cu(NCS)

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JF - Physica C: Superconductivity and its Applications

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