Specific heat of Li2 (Pd1 - x Ptx)3 B superconductors [x = 0, 0.5, and 1]

Hiroyuki Takeya; Shigeru Kasahara; Mohammed El Massalami; Takashi Mochiku; Kazuto Hirata; Kazumasa Togano

doi:10.1016/j.physb.2007.10.249

Specific heat of Li₂ (Pd_{1 - x} Pt_x)₃ B superconductors [x = 0, 0.5, and 1]

Hiroyuki Takeya, Shigeru Kasahara, Mohammed El Massalami, Takashi Mochiku, Kazuto Hirata, Kazumasa Togano

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

2 Citations (Scopus)

Abstract

The specific heat of Li₂ (Pd_{1 - x} Pt_x)₃ B [x = 0, 0.5, 1] was measured. The heat jumps due to the superconducting transition were observed at 7.0, 3.9, and 2.5 K (T_c), respectively. These compounds have the same cubic structure (P 4₃ 32) without mirror or inversion symmetry. Being noncentrosymmetric, it is interesting then to study the symmetry of superconducting gap function and Cooper pairs. The behavior of the electronic-specific heat C_es of Li₂ (Pd_{1 - x} Pt_x)₃ B at low temperatures < T_c / 3 showed different features with varying x. The temperature dependence of C_es for one end member, Li₂ Pd₃ B, follows an exponential behavior as in conventional superconductors, while that of Li₂ Pd_1.5 Pt_1.5 B and Li₂ Pt₃ B tends to follow a quadratic term rather than an exponential one.

Original language	English
Pages (from-to)	1078-1080
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	403
Issue number	5-9
DOIs	https://doi.org/10.1016/j.physb.2007.10.249
Publication status	Published - Apr 1 2008
Externally published	Yes

Keywords

Li Pd B
Li Pt B
Specific heat
Superconductor

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2007.10.249

Cite this

@article{bf829fce26114392850f8c760a36400b,

title = "Specific heat of Li2 (Pd1 - x Ptx)3 B superconductors [x = 0, 0.5, and 1]",

abstract = "The specific heat of Li2 (Pd1 - x Ptx)3 B [x = 0, 0.5, 1] was measured. The heat jumps due to the superconducting transition were observed at 7.0, 3.9, and 2.5 K (Tc), respectively. These compounds have the same cubic structure (P 43 32) without mirror or inversion symmetry. Being noncentrosymmetric, it is interesting then to study the symmetry of superconducting gap function and Cooper pairs. The behavior of the electronic-specific heat Ces of Li2 (Pd1 - x Ptx)3 B at low temperatures < Tc / 3 showed different features with varying x. The temperature dependence of Ces for one end member, Li2 Pd3 B, follows an exponential behavior as in conventional superconductors, while that of Li2 Pd1.5 Pt1.5 B and Li2 Pt3 B tends to follow a quadratic term rather than an exponential one.",

keywords = "Li Pd B, Li Pt B, Specific heat, Superconductor",

author = "Hiroyuki Takeya and Shigeru Kasahara and {El Massalami}, Mohammed and Takashi Mochiku and Kazuto Hirata and Kazumasa Togano",

year = "2008",

month = apr,

day = "1",

doi = "10.1016/j.physb.2007.10.249",

language = "English",

volume = "403",

pages = "1078--1080",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "5-9",

}

TY - JOUR

T1 - Specific heat of Li2 (Pd1 - x Ptx)3 B superconductors [x = 0, 0.5, and 1]

AU - Takeya, Hiroyuki

AU - Kasahara, Shigeru

AU - El Massalami, Mohammed

AU - Mochiku, Takashi

AU - Hirata, Kazuto

AU - Togano, Kazumasa

PY - 2008/4/1

Y1 - 2008/4/1

N2 - The specific heat of Li2 (Pd1 - x Ptx)3 B [x = 0, 0.5, 1] was measured. The heat jumps due to the superconducting transition were observed at 7.0, 3.9, and 2.5 K (Tc), respectively. These compounds have the same cubic structure (P 43 32) without mirror or inversion symmetry. Being noncentrosymmetric, it is interesting then to study the symmetry of superconducting gap function and Cooper pairs. The behavior of the electronic-specific heat Ces of Li2 (Pd1 - x Ptx)3 B at low temperatures < Tc / 3 showed different features with varying x. The temperature dependence of Ces for one end member, Li2 Pd3 B, follows an exponential behavior as in conventional superconductors, while that of Li2 Pd1.5 Pt1.5 B and Li2 Pt3 B tends to follow a quadratic term rather than an exponential one.

AB - The specific heat of Li2 (Pd1 - x Ptx)3 B [x = 0, 0.5, 1] was measured. The heat jumps due to the superconducting transition were observed at 7.0, 3.9, and 2.5 K (Tc), respectively. These compounds have the same cubic structure (P 43 32) without mirror or inversion symmetry. Being noncentrosymmetric, it is interesting then to study the symmetry of superconducting gap function and Cooper pairs. The behavior of the electronic-specific heat Ces of Li2 (Pd1 - x Ptx)3 B at low temperatures < Tc / 3 showed different features with varying x. The temperature dependence of Ces for one end member, Li2 Pd3 B, follows an exponential behavior as in conventional superconductors, while that of Li2 Pd1.5 Pt1.5 B and Li2 Pt3 B tends to follow a quadratic term rather than an exponential one.

KW - Li Pd B

KW - Li Pt B

KW - Specific heat

KW - Superconductor

UR - http://www.scopus.com/inward/record.url?scp=39749140329&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=39749140329&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2007.10.249

DO - 10.1016/j.physb.2007.10.249

M3 - Article

AN - SCOPUS:39749140329

VL - 403

SP - 1078

EP - 1080

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 5-9

ER -