Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe3

M. A. Méasson; H. Muranaka; T. D. Matsuda; T. Kawai; Y. Haga; G. Knebel; D. Aoki; G. Lapertot; F. Honda; R. Settai; J. P. Brison; J. Flouquet; K. Shimizu; Y. Onuki

doi:10.1016/j.physc.2009.11.013

Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe₃

M. A. Méasson, H. Muranaka, T. D. Matsuda, T. Kawai, Y. Haga, G. Knebel, D. Aoki, G. Lapertot, F. Honda, R. Settai, J. P. Brison, J. Flouquet, K. Shimizu, Y. Onuki

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

3 Citations (Scopus)

Abstract

We report the upper critical field, H_c2, of the non-centrosymmetric compound CeCoGe₃ by resistivity measurements under high pressure of 7.1 GPa, for H along c and a axis, and for a magnetic field up to 17 T. H_c2 is very anisotropic, saturating at low temperature for H along the a axis and linear for H along the c axis. Very high H_c2(T) is observed for H along the c axis, with a huge value of the slope dH_c2/dT = -47 ± 1.3 T/K, the highest ever reported if normalized to the superconducting temperature of 0.65 K. This is most probably related to a conjunction of a heavy fermionic state and the absence of the Pauli limitation. A fit of H_c2(T) shows that the curves for a and c axis can be reproduced with a moderate coupling Eliashberg theory.

Original language	English
Pages (from-to)	S536-S538
Journal	Physica C: Superconductivity and its applications
Volume	470
Issue number	SUPPL.1
DOIs	https://doi.org/10.1016/j.physc.2009.11.013
Publication status	Published - 2010 Dec
Externally published	Yes

Keywords

CeCoGe
Non-centrosymmetry
Pressure
Superconductivity
Upper critical field

ASJC Scopus subject areas

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

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Méasson, M. A., Muranaka, H., Matsuda, T. D., Kawai, T., Haga, Y., Knebel, G., Aoki, D., Lapertot, G., Honda, F., Settai, R., Brison, J. P., Flouquet, J., Shimizu, K., & Onuki, Y. (2010). Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe₃. Physica C: Superconductivity and its applications, 470(SUPPL.1), S536-S538. https://doi.org/10.1016/j.physc.2009.11.013

Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe₃. / Méasson, M. A.; Muranaka, H.; Matsuda, T. D.; Kawai, T.; Haga, Y.; Knebel, G.; Aoki, D.; Lapertot, G.; Honda, F.; Settai, R.; Brison, J. P.; Flouquet, J.; Shimizu, K.; Onuki, Y.

In: Physica C: Superconductivity and its applications, Vol. 470, No. SUPPL.1, 12.2010, p. S536-S538.

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

Méasson, MA, Muranaka, H, Matsuda, TD, Kawai, T, Haga, Y, Knebel, G, Aoki, D, Lapertot, G, Honda, F, Settai, R, Brison, JP, Flouquet, J, Shimizu, K & Onuki, Y 2010, 'Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe₃', Physica C: Superconductivity and its applications, vol. 470, no. SUPPL.1, pp. S536-S538. https://doi.org/10.1016/j.physc.2009.11.013

Méasson, M. A. ; Muranaka, H. ; Matsuda, T. D. ; Kawai, T. ; Haga, Y. ; Knebel, G. ; Aoki, D. ; Lapertot, G. ; Honda, F. ; Settai, R. ; Brison, J. P. ; Flouquet, J. ; Shimizu, K. ; Onuki, Y. / Huge upper critical field in the superconductor with non-centrosymmetric crystal structure CeCoGe₃. In: Physica C: Superconductivity and its applications. 2010 ; Vol. 470, No. SUPPL.1. pp. S536-S538.

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abstract = "We report the upper critical field, Hc2, of the non-centrosymmetric compound CeCoGe3 by resistivity measurements under high pressure of 7.1 GPa, for H along c and a axis, and for a magnetic field up to 17 T. Hc2 is very anisotropic, saturating at low temperature for H along the a axis and linear for H along the c axis. Very high Hc2(T) is observed for H along the c axis, with a huge value of the slope dHc2/dT = -47 ± 1.3 T/K, the highest ever reported if normalized to the superconducting temperature of 0.65 K. This is most probably related to a conjunction of a heavy fermionic state and the absence of the Pauli limitation. A fit of Hc2(T) shows that the curves for a and c axis can be reproduced with a moderate coupling Eliashberg theory.",

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AU - Muranaka, H.

AU - Matsuda, T. D.

AU - Kawai, T.

AU - Haga, Y.

AU - Knebel, G.

AU - Aoki, D.

AU - Lapertot, G.

AU - Honda, F.

AU - Settai, R.

AU - Brison, J. P.

AU - Flouquet, J.

AU - Shimizu, K.

AU - Onuki, Y.

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N2 - We report the upper critical field, Hc2, of the non-centrosymmetric compound CeCoGe3 by resistivity measurements under high pressure of 7.1 GPa, for H along c and a axis, and for a magnetic field up to 17 T. Hc2 is very anisotropic, saturating at low temperature for H along the a axis and linear for H along the c axis. Very high Hc2(T) is observed for H along the c axis, with a huge value of the slope dHc2/dT = -47 ± 1.3 T/K, the highest ever reported if normalized to the superconducting temperature of 0.65 K. This is most probably related to a conjunction of a heavy fermionic state and the absence of the Pauli limitation. A fit of Hc2(T) shows that the curves for a and c axis can be reproduced with a moderate coupling Eliashberg theory.

AB - We report the upper critical field, Hc2, of the non-centrosymmetric compound CeCoGe3 by resistivity measurements under high pressure of 7.1 GPa, for H along c and a axis, and for a magnetic field up to 17 T. Hc2 is very anisotropic, saturating at low temperature for H along the a axis and linear for H along the c axis. Very high Hc2(T) is observed for H along the c axis, with a huge value of the slope dHc2/dT = -47 ± 1.3 T/K, the highest ever reported if normalized to the superconducting temperature of 0.65 K. This is most probably related to a conjunction of a heavy fermionic state and the absence of the Pauli limitation. A fit of Hc2(T) shows that the curves for a and c axis can be reproduced with a moderate coupling Eliashberg theory.

KW - CeCoGe

KW - Non-centrosymmetry

KW - Pressure

KW - Superconductivity

KW - Upper critical field

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