Strong-coupling superconductivity in noncentrosymmetric superconductor Li 2Pd 3B by sub-mev photoemission spectroscopy

Shunsuke Tsuda; Takayoshi Yokoya; Takayuki Kiss; Takahiro Shimojima; Kyoko Ishizaka; Shik Shin; Tadashi Togashi; Shuntaro Watanabe; Zhang Chengqian; Chen Chuangtian; Izumi Hase; Hiroyuki Takeya; Kazuto Hirata; Kazumasa Togano

doi:10.1143/JPSJ.78.034711

Strong-coupling superconductivity in noncentrosymmetric superconductor Li ₂Pd ₃B by sub-mev photoemission spectroscopy

Shunsuke Tsuda, Takayoshi Yokoya, Takayuki Kiss, Takahiro Shimojima, Kyoko Ishizaka, Shik Shin, Tadashi Togashi, Shuntaro Watanabe, Zhang Chengqian, Chen Chuangtian, Izumi Hase, Hiroyuki Takeya, Kazuto Hirata, Kazumasa Togano

School of Science

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

7 Citations (Scopus)

Abstract

Noncentrosymmetric superconductors Li ₂Pd ₃B and Li ₂Pt ₃B are studied by high-resolution photoemission spectroscopy. The valence band spectra of Li ₂Pd ₃B and Li ₂Pt ₃B are well explained by firstprinciples band calculations. The sub-meV photoemission result shows that the size of the superconducting gap of Li ₂Pd ₃B is about 1.1 meV at 5.4K with a reduced gap value (2Δ0=ξ _BT _c) of about 4.5, which is greater than the Bardeen-Cooper-Schrieffer (BCS) value of 3.52. The obtained superconducting gap can be explained more clearly with an s-wave superconducting gap than with p- and d-wave superconducting gaps. This result indicates that Li ₂Pd ₃B is a conventional strong-coupling superconductor.

Original language	English
Article number	034711
Journal	journal of the physical society of japan
Volume	78
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.78.034711
Publication status	Published - Mar 2009

Keywords

High-resolution photoemission spectroscopy
Noncentrosymmetric superconductor
Strong-coupling
Superconducting gap

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.78.034711

Cite this

Tsuda, S., Yokoya, T., Kiss, T., Shimojima, T., Ishizaka, K., Shin, S., Togashi, T., Watanabe, S., Chengqian, Z., Chuangtian, C., Hase, I., Takeya, H., Hirata, K., & Togano, K. (2009). Strong-coupling superconductivity in noncentrosymmetric superconductor Li ₂Pd ₃B by sub-mev photoemission spectroscopy. journal of the physical society of japan, 78(3), Article 034711. https://doi.org/10.1143/JPSJ.78.034711

Tsuda, S, Yokoya, T, Kiss, T, Shimojima, T, Ishizaka, K, Shin, S, Togashi, T, Watanabe, S, Chengqian, Z, Chuangtian, C, Hase, I, Takeya, H, Hirata, K & Togano, K 2009, 'Strong-coupling superconductivity in noncentrosymmetric superconductor Li ₂Pd ₃B by sub-mev photoemission spectroscopy', journal of the physical society of japan, vol. 78, no. 3, 034711. https://doi.org/10.1143/JPSJ.78.034711

@article{b4aff97558964903bb0ade6ac5cb8dd2,

title = "Strong-coupling superconductivity in noncentrosymmetric superconductor Li 2Pd 3B by sub-mev photoemission spectroscopy",

abstract = "Noncentrosymmetric superconductors Li 2Pd 3B and Li 2Pt 3B are studied by high-resolution photoemission spectroscopy. The valence band spectra of Li 2Pd 3B and Li 2Pt 3B are well explained by firstprinciples band calculations. The sub-meV photoemission result shows that the size of the superconducting gap of Li 2Pd 3B is about 1.1 meV at 5.4K with a reduced gap value (2Δ0=ξ BT c) of about 4.5, which is greater than the Bardeen-Cooper-Schrieffer (BCS) value of 3.52. The obtained superconducting gap can be explained more clearly with an s-wave superconducting gap than with p- and d-wave superconducting gaps. This result indicates that Li 2Pd 3B is a conventional strong-coupling superconductor.",

keywords = "High-resolution photoemission spectroscopy, Noncentrosymmetric superconductor, Strong-coupling, Superconducting gap",

author = "Shunsuke Tsuda and Takayoshi Yokoya and Takayuki Kiss and Takahiro Shimojima and Kyoko Ishizaka and Shik Shin and Tadashi Togashi and Shuntaro Watanabe and Zhang Chengqian and Chen Chuangtian and Izumi Hase and Hiroyuki Takeya and Kazuto Hirata and Kazumasa Togano",

year = "2009",

month = mar,

doi = "10.1143/JPSJ.78.034711",

language = "English",

volume = "78",

journal = "journal of the physical society of japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "3",

}

TY - JOUR

T1 - Strong-coupling superconductivity in noncentrosymmetric superconductor Li 2Pd 3B by sub-mev photoemission spectroscopy

AU - Tsuda, Shunsuke

AU - Yokoya, Takayoshi

AU - Kiss, Takayuki

AU - Shimojima, Takahiro

AU - Ishizaka, Kyoko

AU - Shin, Shik

AU - Togashi, Tadashi

AU - Watanabe, Shuntaro

AU - Chengqian, Zhang

AU - Chuangtian, Chen

AU - Hase, Izumi

AU - Takeya, Hiroyuki

AU - Hirata, Kazuto

AU - Togano, Kazumasa

PY - 2009/3

Y1 - 2009/3

N2 - Noncentrosymmetric superconductors Li 2Pd 3B and Li 2Pt 3B are studied by high-resolution photoemission spectroscopy. The valence band spectra of Li 2Pd 3B and Li 2Pt 3B are well explained by firstprinciples band calculations. The sub-meV photoemission result shows that the size of the superconducting gap of Li 2Pd 3B is about 1.1 meV at 5.4K with a reduced gap value (2Δ0=ξ BT c) of about 4.5, which is greater than the Bardeen-Cooper-Schrieffer (BCS) value of 3.52. The obtained superconducting gap can be explained more clearly with an s-wave superconducting gap than with p- and d-wave superconducting gaps. This result indicates that Li 2Pd 3B is a conventional strong-coupling superconductor.

AB - Noncentrosymmetric superconductors Li 2Pd 3B and Li 2Pt 3B are studied by high-resolution photoemission spectroscopy. The valence band spectra of Li 2Pd 3B and Li 2Pt 3B are well explained by firstprinciples band calculations. The sub-meV photoemission result shows that the size of the superconducting gap of Li 2Pd 3B is about 1.1 meV at 5.4K with a reduced gap value (2Δ0=ξ BT c) of about 4.5, which is greater than the Bardeen-Cooper-Schrieffer (BCS) value of 3.52. The obtained superconducting gap can be explained more clearly with an s-wave superconducting gap than with p- and d-wave superconducting gaps. This result indicates that Li 2Pd 3B is a conventional strong-coupling superconductor.

KW - High-resolution photoemission spectroscopy

KW - Noncentrosymmetric superconductor

KW - Strong-coupling

KW - Superconducting gap

UR - http://www.scopus.com/inward/record.url?scp=84856089097&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856089097&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.78.034711

DO - 10.1143/JPSJ.78.034711

M3 - Article

AN - SCOPUS:84856089097

SN - 0031-9015

VL - 78

JO - journal of the physical society of japan

JF - journal of the physical society of japan

IS - 3

M1 - 034711

ER -