Evolution of the superconducting transition temperature upon a substitution of Pd by Pt in Li2(Pd1-xPtx)3B (x=0-1)

Sk Md Shamsuzzaman, Yoshihiko Inada, S. Sasano, S. Harada, Guo-Qing Zheng

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Abstract

We investigate on the evolution of the superconducting transition temperature upon a substitution of Pd by Pt in the noncentrosymmetric superconductor Li2(Pd1-xPtx)3B. The spin singlet and spin triplet superconducting states can coexist in noncentrosymmetric crystal structures like Li2T3B (T=Pt, Pd), while it is prohibited in ordinary crystal structures. This study is conducted to investigate the crossover nature in Li2 (Pd 1-xPtx) 3B (x=0-1) for obtaining information on the parity mixing. We have succeeded in synthesizing samples which have higher Tc than previous results around x=1. A lot of samples have been synthesized with different ratios of x, and we found that the value of T c changed continuously and there was no clear discontinuity between spin singlet dominant (x∼0) and spin triplet dominant (x∼1) state in Tc value, although the x dependence of Tc is decreasing nonlinearly with the increase of x. The higher x region around x∼0.8 seems to be suppressed from linear behaviour.

Original languageEnglish
Article number012183
JournalJournal of Physics: Conference Series
Volume200
Issue numberSECTION 1
DOIs
Publication statusPublished - 2010

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transition temperature
substitutes
crystal structure
crossovers
discontinuity
parity

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Evolution of the superconducting transition temperature upon a substitution of Pd by Pt in Li2(Pd1-xPtx)3B (x=0-1). / Shamsuzzaman, Sk Md; Inada, Yoshihiko; Sasano, S.; Harada, S.; Zheng, Guo-Qing.

In: Journal of Physics: Conference Series, Vol. 200, No. SECTION 1, 012183, 2010.

Research output: Contribution to journalArticle

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AU - Inada, Yoshihiko

AU - Sasano, S.

AU - Harada, S.

AU - Zheng, Guo-Qing

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N2 - We investigate on the evolution of the superconducting transition temperature upon a substitution of Pd by Pt in the noncentrosymmetric superconductor Li2(Pd1-xPtx)3B. The spin singlet and spin triplet superconducting states can coexist in noncentrosymmetric crystal structures like Li2T3B (T=Pt, Pd), while it is prohibited in ordinary crystal structures. This study is conducted to investigate the crossover nature in Li2 (Pd 1-xPtx) 3B (x=0-1) for obtaining information on the parity mixing. We have succeeded in synthesizing samples which have higher Tc than previous results around x=1. A lot of samples have been synthesized with different ratios of x, and we found that the value of T c changed continuously and there was no clear discontinuity between spin singlet dominant (x∼0) and spin triplet dominant (x∼1) state in Tc value, although the x dependence of Tc is decreasing nonlinearly with the increase of x. The higher x region around x∼0.8 seems to be suppressed from linear behaviour.

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