London penetration depth in (BEDT-TTF)2 superconductors

R. W. Giannetta; D. D. Lawrie; A. Carrington; R. Prozorov; U. A. Schlueter; A. M. Kini; U. Geiser; J. Mohtasham; R. W. Winter; G. L. Gard

doi:10.1051/jp4:2004114046

London penetration depth in (BEDT-TTF)₂ superconductors

R. W. Giannetta
, D. D. Lawrie
, A. Carrington
, R. Prozorov
, U. A. Schlueter
, A. M. Kini
, U. Geiser
, J. Mohtasham
, R. W. Winter
, G. L. Gard

Physics

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

Abstract

Measurements of the London penetration depth, λ(T), are reported for crystals of superconducting κ-(ET)₂ Cu[N(CN)₂]Br (T_C = 11.6 K) and β″-(ET)₂-SF ₅CH₂CF₂SO₃ (T_C = 5.2 K) at temperatures down to 0.35 K. For κ-(ET)₂ Cu[N(CN) ₂]Br the superfluid density shows the power law behavior characteristic of nodal quasiparticles with impurity scattering. The rate of change of superfluid density with temperature is higher than predicted by a weak-coupling d-wave model and higher than observed in the copper oxides. The in-plane penetration depth consistently shows a T^3/2 dependence while the interplane penetration depth varies as T^1.22. Measurements in β″-(ET)₂-SF₅CH₂CF₂SO ₃ also show power law behavior consistent with nodal quasiparticles but with greater impurity scattering than in κ-(ET)₂ Cu[N(CN)₂]Br.

Original language	English (US)
Pages (from-to)	211-215
Number of pages	5
Journal	Journal De Physique. IV : JP
Volume	114
DOIs	https://doi.org/10.1051/jp4:2004114046
State	Published - 2004
Event	ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets - Port-Bourgenay, France Duration: Sep 21 2003 → Sep 26 2003

Keywords

Order parameter
Organic superconductor
Penetration depth
Superfluid density

ASJC Scopus subject areas

General Physics and Astronomy

Online availability

10.1051/jp4:2004114046

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Cite this

@article{d3e8aedec2a04930afb3b9b1b49da351,

title = "London penetration depth in (BEDT-TTF)2 superconductors",

abstract = "Measurements of the London penetration depth, λ(T), are reported for crystals of superconducting κ-(ET)2 Cu[N(CN)2]Br (TC = 11.6 K) and β″-(ET)2-SF 5CH2CF2SO3 (TC = 5.2 K) at temperatures down to 0.35 K. For κ-(ET)2 Cu[N(CN) 2]Br the superfluid density shows the power law behavior characteristic of nodal quasiparticles with impurity scattering. The rate of change of superfluid density with temperature is higher than predicted by a weak-coupling d-wave model and higher than observed in the copper oxides. The in-plane penetration depth consistently shows a T3/2 dependence while the interplane penetration depth varies as T1.22. Measurements in β″-(ET)2-SF5CH2CF2SO 3 also show power law behavior consistent with nodal quasiparticles but with greater impurity scattering than in κ-(ET)2 Cu[N(CN)2]Br.",

keywords = "Order parameter, Organic superconductor, Penetration depth, Superfluid density",

author = "Giannetta, \{R. W.\} and Lawrie, \{D. D.\} and A. Carrington and R. Prozorov and Schlueter, \{U. A.\} and Kini, \{A. M.\} and U. Geiser and J. Mohtasham and Winter, \{R. W.\} and Gard, \{G. L.\}",

note = "Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; ISCOM 2003: 5th International Symposium on Crystalline Organic Metals, Superconductors and Ferromagnets ; Conference date: 21-09-2003 Through 26-09-2003",

year = "2004",

doi = "10.1051/jp4:2004114046",

language = "English (US)",

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pages = "211--215",

journal = "Journal De Physique. IV : JP",

issn = "1155-4339",

publisher = "Springer",

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T1 - London penetration depth in (BEDT-TTF)2 superconductors

AU - Giannetta, R. W.

AU - Lawrie, D. D.

AU - Carrington, A.

AU - Prozorov, R.

AU - Schlueter, U. A.

AU - Kini, A. M.

AU - Geiser, U.

AU - Mohtasham, J.

AU - Winter, R. W.

AU - Gard, G. L.

PY - 2004

Y1 - 2004

N2 - Measurements of the London penetration depth, λ(T), are reported for crystals of superconducting κ-(ET)2 Cu[N(CN)2]Br (TC = 11.6 K) and β″-(ET)2-SF 5CH2CF2SO3 (TC = 5.2 K) at temperatures down to 0.35 K. For κ-(ET)2 Cu[N(CN) 2]Br the superfluid density shows the power law behavior characteristic of nodal quasiparticles with impurity scattering. The rate of change of superfluid density with temperature is higher than predicted by a weak-coupling d-wave model and higher than observed in the copper oxides. The in-plane penetration depth consistently shows a T3/2 dependence while the interplane penetration depth varies as T1.22. Measurements in β″-(ET)2-SF5CH2CF2SO 3 also show power law behavior consistent with nodal quasiparticles but with greater impurity scattering than in κ-(ET)2 Cu[N(CN)2]Br.

AB - Measurements of the London penetration depth, λ(T), are reported for crystals of superconducting κ-(ET)2 Cu[N(CN)2]Br (TC = 11.6 K) and β″-(ET)2-SF 5CH2CF2SO3 (TC = 5.2 K) at temperatures down to 0.35 K. For κ-(ET)2 Cu[N(CN) 2]Br the superfluid density shows the power law behavior characteristic of nodal quasiparticles with impurity scattering. The rate of change of superfluid density with temperature is higher than predicted by a weak-coupling d-wave model and higher than observed in the copper oxides. The in-plane penetration depth consistently shows a T3/2 dependence while the interplane penetration depth varies as T1.22. Measurements in β″-(ET)2-SF5CH2CF2SO 3 also show power law behavior consistent with nodal quasiparticles but with greater impurity scattering than in κ-(ET)2 Cu[N(CN)2]Br.

KW - Order parameter

KW - Organic superconductor

KW - Penetration depth

KW - Superfluid density

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