Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi2B2C

A. Shibata; K. Izawa; Y. Matsuda; Y. Kato; H. Takeya; K. Hirata; C. J. Van Der Beek; M. Konczykowski

doi:10.1016/S0022-3697(02)00114-2

Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi₂B₂C

A. Shibata
, K. Izawa
, Y. Matsuda
, Y. Kato
, H. Takeya
, K. Hirata
, C. J. Van Der Beek
, M. Konczykowski

École Polytechnique

University of Tokyo
National Institute for Materials Science
Laboratoire des Solides Irradiés

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

1 Citation (Scopus)

Abstract

We have measured the low temperature heat capacity C_p in the vortex state of YNi₂B₂C. In contrast to conventional s-wave superconductors, C_p shows a nearly √H-dependence. This √H-dependence persists even after the introduction of the columnar defects which change the electronic structure of the vortex core regime dramatically and strongly disturb the regular vortex lattice. These results indicate that the vortex state of YNi₂B₂C is fundamentally different from the conventional s-wave counterparts, in that the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.

Original language	English
Pages (from-to)	991-993
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	63
Issue number	6-8
DOIs	https://doi.org/10.1016/S0022-3697(02)00114-2
Publication status	Published - 1 Jan 2002

Keywords

A. Superconductors
D. Specific heat
D. Superconductivity

Access to Document

10.1016/S0022-3697(02)00114-2

Cite this

@article{1ae9c761dac74bb88c08177c8e8b8c78,

title = "Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi2B2C",

abstract = "We have measured the low temperature heat capacity Cp in the vortex state of YNi2B2C. In contrast to conventional s-wave superconductors, Cp shows a nearly √H-dependence. This √H-dependence persists even after the introduction of the columnar defects which change the electronic structure of the vortex core regime dramatically and strongly disturb the regular vortex lattice. These results indicate that the vortex state of YNi2B2C is fundamentally different from the conventional s-wave counterparts, in that the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.",

keywords = "A. Superconductors, D. Specific heat, D. Superconductivity",

author = "A. Shibata and K. Izawa and Y. Matsuda and Y. Kato and H. Takeya and K. Hirata and \{Van Der Beek\}, \{C. J.\} and M. Konczykowski",

year = "2002",

month = jan,

day = "1",

doi = "10.1016/S0022-3697(02)00114-2",

language = "English",

volume = "63",

pages = "991--993",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Ltd",

number = "6-8",

}

TY - JOUR

T1 - Quasiparticle structure in the vortex state of anisotropic s-wave superconductor YNi2B2C

AU - Shibata, A.

AU - Izawa, K.

AU - Matsuda, Y.

AU - Kato, Y.

AU - Takeya, H.

AU - Hirata, K.

AU - Van Der Beek, C. J.

AU - Konczykowski, M.

PY - 2002/1/1

Y1 - 2002/1/1

N2 - We have measured the low temperature heat capacity Cp in the vortex state of YNi2B2C. In contrast to conventional s-wave superconductors, Cp shows a nearly √H-dependence. This √H-dependence persists even after the introduction of the columnar defects which change the electronic structure of the vortex core regime dramatically and strongly disturb the regular vortex lattice. These results indicate that the vortex state of YNi2B2C is fundamentally different from the conventional s-wave counterparts, in that the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.

AB - We have measured the low temperature heat capacity Cp in the vortex state of YNi2B2C. In contrast to conventional s-wave superconductors, Cp shows a nearly √H-dependence. This √H-dependence persists even after the introduction of the columnar defects which change the electronic structure of the vortex core regime dramatically and strongly disturb the regular vortex lattice. These results indicate that the vortex state of YNi2B2C is fundamentally different from the conventional s-wave counterparts, in that the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.

KW - A. Superconductors

KW - D. Specific heat

KW - D. Superconductivity

U2 - 10.1016/S0022-3697(02)00114-2

DO - 10.1016/S0022-3697(02)00114-2

M3 - Article

AN - SCOPUS:0036602424

SN - 0022-3697

VL - 63

SP - 991

EP - 993

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 6-8