Superstructure-dependent electronic states in CaAlSi superconductors studied by angle-resolved photoemission spectroscopy

T. Sato, Y. X. Xiao, S. Souma, K. Nakayama, K. Sugawara, S. Kuroiwa, Jun Akimitsu, T. Takahashi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy on layered polymorph series of 1H-, 5H-, and 6H-CaAlSi, which exhibit superconductivity below 6.5, 5.7, and 7.7 K, respectively. While the overall band structure in the valence-band region is similar among these compounds, the volume of the Fermi surface at the M point and the magnitude of the superconducting gap are markedly different from each other. Implications of such variation in the electronic structure due to the superstructure along the c axis are discussed in relation to the physical properties of CaAlSi.

Original languageEnglish
Article number195114
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number19
DOIs
Publication statusPublished - May 11 2015
Externally publishedYes

Fingerprint

Fermi surface
Electronic states
Photoelectron spectroscopy
Valence bands
Superconductivity
Polymorphism
Band structure
Superconducting materials
Electronic structure
photoelectric emission
Physical properties
electronics
spectroscopy
Fermi surfaces
superconductivity
physical properties
electronic structure
valence
high resolution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Superstructure-dependent electronic states in CaAlSi superconductors studied by angle-resolved photoemission spectroscopy. / Sato, T.; Xiao, Y. X.; Souma, S.; Nakayama, K.; Sugawara, K.; Kuroiwa, S.; Akimitsu, Jun; Takahashi, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 91, No. 19, 195114, 11.05.2015.

Research output: Contribution to journalArticle

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