New high field state of flux line lattice in CeCoIn5

Y. Kasahara; T. Watanabe; K. Izawa; T. Sakakibara; C. J. Van Der Beek; T. Hanaguri; M. Nohara; H. Takagi; H. Shishido; R. Settai; Y. Onuki; Y. Matsuda

doi:10.1016/j.physc.2005.02.018

New high field state of flux line lattice in CeCoIn₅

Y. Kasahara
, T. Watanabe
, K. Izawa
, T. Sakakibara
, C. J. Van Der Beek
, T. Hanaguri
, M. Nohara
, H. Takagi
, H. Shishido
, R. Settai
, Y. Onuki
, Y. Matsuda

École Polytechnique

University of Tokyo
RIKEN (The Institute of Physical and Chemical Research)
Osaka University
Kyoto University

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

Abstract

We have measured the ultrasound velocity of quasi-two-dimensional superconductor CeCoIn₅ with extremely large Pauli paramagnetic susceptibility. The results indicate that the new high field superconducting phase, which is revealed by the recent heat capacity measurements, is characterized by the unusual softening of flux line lattice. The softening is most likely due to the collapse of the flux line lattice tilt modulus and transition to quasi-two-dimensional vortex state. These results provide a strong evidence that the high field phase is the Fulde-Ferrell-Larkin-Ovchinnikov phase, in which the order parameter is spatially modulated and has planar nodes aligned perpendicularly to the vortices.

Original language	English
Pages (from-to)	36-40
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.02.018
Publication status	Published - 1 Oct 2005
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 23 Nov 2004 → 25 Nov 2004

Keywords

CeCoIn
FFLO state
Flux line lattice
Ultrasound velocity

Access to Document

10.1016/j.physc.2005.02.018

Cite this

@article{3d25bd405e6c4461a2f3e4decd517a37,

title = "New high field state of flux line lattice in CeCoIn5",

abstract = "We have measured the ultrasound velocity of quasi-two-dimensional superconductor CeCoIn5 with extremely large Pauli paramagnetic susceptibility. The results indicate that the new high field superconducting phase, which is revealed by the recent heat capacity measurements, is characterized by the unusual softening of flux line lattice. The softening is most likely due to the collapse of the flux line lattice tilt modulus and transition to quasi-two-dimensional vortex state. These results provide a strong evidence that the high field phase is the Fulde-Ferrell-Larkin-Ovchinnikov phase, in which the order parameter is spatially modulated and has planar nodes aligned perpendicularly to the vortices.",

keywords = "CeCoIn, FFLO state, Flux line lattice, Ultrasound velocity",

author = "Y. Kasahara and T. Watanabe and K. Izawa and T. Sakakibara and \{Van Der Beek\}, \{C. J.\} and T. Hanaguri and M. Nohara and H. Takagi and H. Shishido and R. Settai and Y. Onuki and Y. Matsuda",

year = "2005",

month = oct,

day = "1",

doi = "10.1016/j.physc.2005.02.018",

language = "English",

volume = "426-431",

pages = "36--40",

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

issn = "0921-4534",

number = "I",

note = "Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

}

TY - JOUR

T1 - New high field state of flux line lattice in CeCoIn5

AU - Kasahara, Y.

AU - Watanabe, T.

AU - Izawa, K.

AU - Sakakibara, T.

AU - Van Der Beek, C. J.

AU - Hanaguri, T.

AU - Nohara, M.

AU - Takagi, H.

AU - Shishido, H.

AU - Settai, R.

AU - Onuki, Y.

AU - Matsuda, Y.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We have measured the ultrasound velocity of quasi-two-dimensional superconductor CeCoIn5 with extremely large Pauli paramagnetic susceptibility. The results indicate that the new high field superconducting phase, which is revealed by the recent heat capacity measurements, is characterized by the unusual softening of flux line lattice. The softening is most likely due to the collapse of the flux line lattice tilt modulus and transition to quasi-two-dimensional vortex state. These results provide a strong evidence that the high field phase is the Fulde-Ferrell-Larkin-Ovchinnikov phase, in which the order parameter is spatially modulated and has planar nodes aligned perpendicularly to the vortices.

AB - We have measured the ultrasound velocity of quasi-two-dimensional superconductor CeCoIn5 with extremely large Pauli paramagnetic susceptibility. The results indicate that the new high field superconducting phase, which is revealed by the recent heat capacity measurements, is characterized by the unusual softening of flux line lattice. The softening is most likely due to the collapse of the flux line lattice tilt modulus and transition to quasi-two-dimensional vortex state. These results provide a strong evidence that the high field phase is the Fulde-Ferrell-Larkin-Ovchinnikov phase, in which the order parameter is spatially modulated and has planar nodes aligned perpendicularly to the vortices.

KW - CeCoIn

KW - FFLO state

KW - Flux line lattice

KW - Ultrasound velocity

U2 - 10.1016/j.physc.2005.02.018

DO - 10.1016/j.physc.2005.02.018

M3 - Conference article

AN - SCOPUS:25444502893

SN - 0921-4534

VL - 426-431

SP - 36

EP - 40

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - I

T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity

Y2 - 23 November 2004 through 25 November 2004