Various analyses of specific heat for the order parameter of superconductor Na0.35coO2·1.3H2O

C. P. Sun; J. Y. Lin; Y. C. Kang; C. L. Huang; K. Takada; T. Sasaki; H. Sakurai; E. Takayama-Muromachi; H. D. Yang

doi:10.1016/j.physb.2006.01.445

Various analyses of specific heat for the order parameter of superconductor Na_0.35coO₂·1.3H₂O

C. P. Sun, J. Y. Lin, Y. C. Kang, C. L. Huang, K. Takada, T. Sasaki, H. Sakurai, E. Takayama-Muromachi, H. D. Yang

Department of Physics

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Abstract

Low-temperature specific-heat data C(T) of two Na_0.35CoO₂. 1.3H₂O samples (I and II) with temperature T down to 0.6 K without and with magnetic field of 8 T are presented. The normal-state linear coefficient of specific heat γ_n, Debye temperature Θ_D, superconducting transition temperature T_c, specific heat jump at T_c, ΔC/γ_nsT_c, and superconducting volume of fraction (SVF) are 14.89 mJ/mol K², 503, 4.7 K, 1.96, and 26.6% for sample I and 13.94 mJ/mol K², 362, 4.5 K, 1.45, and 47.4% for sample II, respectively. Because the superconducting properties may depend on the water content of sample, it is found that the better quality (higher SVF) of sample, the nodal order parameter is better than BCS isotropic s-wave model in describing the gap function of this interesting compound Na_0.35CoO₂. 1.3H₂O.

Original language	English
Pages (from-to)	865-866
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.445
Publication status	Published - 2006 May 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.01.445

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@article{713823edf1d44e6f87b6b995942d0b8d,

title = "Various analyses of specific heat for the order parameter of superconductor Na0.35coO2·1.3H2O",

abstract = "Low-temperature specific-heat data C(T) of two Na0.35CoO2. 1.3H2O samples (I and II) with temperature T down to 0.6 K without and with magnetic field of 8 T are presented. The normal-state linear coefficient of specific heat γn, Debye temperature ΘD, superconducting transition temperature Tc, specific heat jump at Tc, ΔC/γnsTc, and superconducting volume of fraction (SVF) are 14.89 mJ/mol K2, 503, 4.7 K, 1.96, and 26.6% for sample I and 13.94 mJ/mol K2, 362, 4.5 K, 1.45, and 47.4% for sample II, respectively. Because the superconducting properties may depend on the water content of sample, it is found that the better quality (higher SVF) of sample, the nodal order parameter is better than BCS isotropic s-wave model in describing the gap function of this interesting compound Na0.35CoO2. 1.3H2O.",

author = "Sun, {C. P.} and Lin, {J. Y.} and Kang, {Y. C.} and Huang, {C. L.} and K. Takada and T. Sasaki and H. Sakurai and E. Takayama-Muromachi and Yang, {H. D.}",

note = "Funding Information: This work was supported by National Science Council, Taiwan, Republic of China, under Contracts no. NSC93-2112-M-110-001.",

year = "2006",

month = may,

day = "1",

doi = "10.1016/j.physb.2006.01.445",

language = "English",

volume = "378-380",

pages = "865--866",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "SPEC. ISS.",

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TY - JOUR

T1 - Various analyses of specific heat for the order parameter of superconductor Na0.35coO2·1.3H2O

AU - Sun, C. P.

AU - Lin, J. Y.

AU - Kang, Y. C.

AU - Huang, C. L.

AU - Takada, K.

AU - Sasaki, T.

AU - Sakurai, H.

AU - Takayama-Muromachi, E.

AU - Yang, H. D.

N1 - Funding Information: This work was supported by National Science Council, Taiwan, Republic of China, under Contracts no. NSC93-2112-M-110-001.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Low-temperature specific-heat data C(T) of two Na0.35CoO2. 1.3H2O samples (I and II) with temperature T down to 0.6 K without and with magnetic field of 8 T are presented. The normal-state linear coefficient of specific heat γn, Debye temperature ΘD, superconducting transition temperature Tc, specific heat jump at Tc, ΔC/γnsTc, and superconducting volume of fraction (SVF) are 14.89 mJ/mol K2, 503, 4.7 K, 1.96, and 26.6% for sample I and 13.94 mJ/mol K2, 362, 4.5 K, 1.45, and 47.4% for sample II, respectively. Because the superconducting properties may depend on the water content of sample, it is found that the better quality (higher SVF) of sample, the nodal order parameter is better than BCS isotropic s-wave model in describing the gap function of this interesting compound Na0.35CoO2. 1.3H2O.

AB - Low-temperature specific-heat data C(T) of two Na0.35CoO2. 1.3H2O samples (I and II) with temperature T down to 0.6 K without and with magnetic field of 8 T are presented. The normal-state linear coefficient of specific heat γn, Debye temperature ΘD, superconducting transition temperature Tc, specific heat jump at Tc, ΔC/γnsTc, and superconducting volume of fraction (SVF) are 14.89 mJ/mol K2, 503, 4.7 K, 1.96, and 26.6% for sample I and 13.94 mJ/mol K2, 362, 4.5 K, 1.45, and 47.4% for sample II, respectively. Because the superconducting properties may depend on the water content of sample, it is found that the better quality (higher SVF) of sample, the nodal order parameter is better than BCS isotropic s-wave model in describing the gap function of this interesting compound Na0.35CoO2. 1.3H2O.

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U2 - 10.1016/j.physb.2006.01.445

DO - 10.1016/j.physb.2006.01.445

M3 - Article

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - SPEC. ISS.

ER -

Various analyses of specific heat for the order parameter of superconductor Na_0.35coO₂·1.3H₂O

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