Influence on superconductivity in the parity mixing superconductor Li 2T3B(T: Pt,Pd) by non-magnetic impurity and defect doping

G. Bao, Yoshihiko Inada, G. Eguchi, Y. Maeno, Masanori Ichioka, Guo-Qing Zheng

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Abstract

Superconductors with noncentrosymmetric crystal structures such as Li 2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focused our research on non-magnetic impurity effect in Li2T3B(T:Pd,Pt). The nature of the pair breaking by non-magnetic impurity in the parity mixing superconducting state is still unclear. We prepared different quality samples of Li2Pd3B and Li2Pt3B by changing conditions in synthesizing, and sample qualities were estimated by residual resistivity. Spin singlet dominant superconductor Li2Pd3B exhibits the weak Tc suppression attributed by non-magnetic impurity and defects, while Hc2 (0) value increased. This behavior is similar in ordinary s-wave superconductor. On the other hand, for the spin triplet dominant superconductor Li2Pt3B, it was suggested that the Cooper pair was broken and superconducting gap was decreased by non-magnetic impurities and defects. Li2Pt3B is similar to unconventional superconducting state.

Original languageEnglish
Pages (from-to)95-98
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume494
DOIs
Publication statusPublished - 2013

Fingerprint

Superconductivity
Superconducting materials
parity
superconductivity
Doping (additives)
Impurities
impurities
Defects
defects
Crystal structure
retarding
electrical resistivity
crystal structure

Keywords

  • Li PdB
  • LiPtB
  • Non-magnetic impurity effect
  • Parity mixing superconductor

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Electronic, Optical and Magnetic Materials

Cite this

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title = "Influence on superconductivity in the parity mixing superconductor Li 2T3B(T: Pt,Pd) by non-magnetic impurity and defect doping",
abstract = "Superconductors with noncentrosymmetric crystal structures such as Li 2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focused our research on non-magnetic impurity effect in Li2T3B(T:Pd,Pt). The nature of the pair breaking by non-magnetic impurity in the parity mixing superconducting state is still unclear. We prepared different quality samples of Li2Pd3B and Li2Pt3B by changing conditions in synthesizing, and sample qualities were estimated by residual resistivity. Spin singlet dominant superconductor Li2Pd3B exhibits the weak Tc suppression attributed by non-magnetic impurity and defects, while Hc2 (0) value increased. This behavior is similar in ordinary s-wave superconductor. On the other hand, for the spin triplet dominant superconductor Li2Pt3B, it was suggested that the Cooper pair was broken and superconducting gap was decreased by non-magnetic impurities and defects. Li2Pt3B is similar to unconventional superconducting state.",
keywords = "Li PdB, LiPtB, Non-magnetic impurity effect, Parity mixing superconductor",
author = "G. Bao and Yoshihiko Inada and G. Eguchi and Y. Maeno and Masanori Ichioka and Guo-Qing Zheng",
year = "2013",
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TY - JOUR

T1 - Influence on superconductivity in the parity mixing superconductor Li 2T3B(T

T2 - Pt,Pd) by non-magnetic impurity and defect doping

AU - Bao, G.

AU - Inada, Yoshihiko

AU - Eguchi, G.

AU - Maeno, Y.

AU - Ichioka, Masanori

AU - Zheng, Guo-Qing

PY - 2013

Y1 - 2013

N2 - Superconductors with noncentrosymmetric crystal structures such as Li 2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focused our research on non-magnetic impurity effect in Li2T3B(T:Pd,Pt). The nature of the pair breaking by non-magnetic impurity in the parity mixing superconducting state is still unclear. We prepared different quality samples of Li2Pd3B and Li2Pt3B by changing conditions in synthesizing, and sample qualities were estimated by residual resistivity. Spin singlet dominant superconductor Li2Pd3B exhibits the weak Tc suppression attributed by non-magnetic impurity and defects, while Hc2 (0) value increased. This behavior is similar in ordinary s-wave superconductor. On the other hand, for the spin triplet dominant superconductor Li2Pt3B, it was suggested that the Cooper pair was broken and superconducting gap was decreased by non-magnetic impurities and defects. Li2Pt3B is similar to unconventional superconducting state.

AB - Superconductors with noncentrosymmetric crystal structures such as Li 2T3B(T:Pd,Pt) have been the focus of in-depth research with their parity mixing nature. In this study, we focused our research on non-magnetic impurity effect in Li2T3B(T:Pd,Pt). The nature of the pair breaking by non-magnetic impurity in the parity mixing superconducting state is still unclear. We prepared different quality samples of Li2Pd3B and Li2Pt3B by changing conditions in synthesizing, and sample qualities were estimated by residual resistivity. Spin singlet dominant superconductor Li2Pd3B exhibits the weak Tc suppression attributed by non-magnetic impurity and defects, while Hc2 (0) value increased. This behavior is similar in ordinary s-wave superconductor. On the other hand, for the spin triplet dominant superconductor Li2Pt3B, it was suggested that the Cooper pair was broken and superconducting gap was decreased by non-magnetic impurities and defects. Li2Pt3B is similar to unconventional superconducting state.

KW - Li PdB

KW - LiPtB

KW - Non-magnetic impurity effect

KW - Parity mixing superconductor

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