Heat capacity of YNi2B2C in the vortex state: Evidence of the extended s-wave state

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

doi:10.1016/S0921-4534(01)00338-0

Heat capacity of YNi₂B₂C in the vortex state: Evidence of the extended s-wave state

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

University of Tokyo

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

Abstract

The low temperature heat capacity C_p and microwave surface impedance Z_s in the vortex state of YNi₂B₂C have been studied. In contrast to conventional s-wave superconductors, C_p shows a nearly H^1/2-dependence. This H^1/2-dependence is little affected by the introduction of the columnar defects. On the other hand, flux flow resistivity obtained from Z_s increases linearly with H. These results indicate that in the vortex state of YNi₂B₂C 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)	513-516
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	357-360
DOIs	https://doi.org/10.1016/S0921-4534(01)00338-0
Publication status	Published - 1 Jan 2001
Externally published	Yes

Keywords

Columnar defect
Heat capacity
Quasiparticle structure
YNiBC

Access to Document

10.1016/S0921-4534(01)00338-0

Cite this

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title = "Heat capacity of YNi2B2C in the vortex state: Evidence of the extended s-wave state",

abstract = "The low temperature heat capacity Cp and microwave surface impedance Zs in the vortex state of YNi2B2C have been studied. In contrast to conventional s-wave superconductors, Cp shows a nearly H1/2-dependence. This H1/2-dependence is little affected by the introduction of the columnar defects. On the other hand, flux flow resistivity obtained from Zs increases linearly with H. These results indicate that in the vortex state of YNi2B2C the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.",

keywords = "Columnar defect, Heat capacity, Quasiparticle structure, YNiBC",

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

year = "2001",

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doi = "10.1016/S0921-4534(01)00338-0",

language = "English",

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TY - JOUR

T1 - Heat capacity of YNi2B2C in the vortex state

T2 - Evidence of the extended s-wave state

AU - Izawa, K.

AU - Shibata, A.

AU - Matsuda, Y.

AU - Kato, Y.

AU - Takeya, H.

AU - Hirata, K.

AU - Van der Beek, C. J.

AU - Konczykowski, M.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - The low temperature heat capacity Cp and microwave surface impedance Zs in the vortex state of YNi2B2C have been studied. In contrast to conventional s-wave superconductors, Cp shows a nearly H1/2-dependence. This H1/2-dependence is little affected by the introduction of the columnar defects. On the other hand, flux flow resistivity obtained from Zs increases linearly with H. These results indicate that in the vortex state of YNi2B2C the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.

AB - The low temperature heat capacity Cp and microwave surface impedance Zs in the vortex state of YNi2B2C have been studied. In contrast to conventional s-wave superconductors, Cp shows a nearly H1/2-dependence. This H1/2-dependence is little affected by the introduction of the columnar defects. On the other hand, flux flow resistivity obtained from Zs increases linearly with H. These results indicate that in the vortex state of YNi2B2C the delocalized quasiparticle states around the vortex core play a much more important role, similar to d-wave superconductors.

KW - Columnar defect

KW - Heat capacity

KW - Quasiparticle structure

KW - YNiBC

U2 - 10.1016/S0921-4534(01)00338-0

DO - 10.1016/S0921-4534(01)00338-0

M3 - Article

AN - SCOPUS:18744434278

SN - 0921-4534

VL - 357-360

SP - 513

EP - 516

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications