Direct evidence for cage conduction band in superconducting cement 12CaO.7Al2O3 by low-energy high-resolution photoemission spectroscopy

Seigo Souma; Toshiyuki Arakane; Takafumi Sato; Takashi Takahashi; Sung Wng Kim; Satoru Matsuishi; Hideo Hosono

doi:10.1143/JPSJ.79.103704

Direct evidence for cage conduction band in superconducting cement 12CaO.7Al₂O₃ by low-energy high-resolution photoemission spectroscopy

Seigo Souma, Toshiyuki Arakane, Takafumi Sato, Takashi Takahashi, Sung Wng Kim, Satoru Matsuishi, Hideo Hosono

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

11 Citations (Scopus)

Abstract

We have performed low-energy high-resolution photoemission spectroscopy of a superconducting cement 12CaO.7Al₂O₃ (C12A7). By using the bulk-sensitive xenon-plasma light, we clearly observed a small but well-defined peak at the Fermi level (E_F). Comparison with the band calculations suggests that the observed near-E_F peak is ascribed to the conduction electrons distributed over the crystal cages responsible for the metallic nature and superconductivity of C12A7.

Original language	English
Article number	103704
Journal	journal of the physical society of japan
Volume	79
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.79.103704
Publication status	Published - 2010 Oct

Keywords

12CaO.7AlO
Electronic structure
Photoemission spectroscopy
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.79.103704

Cite this

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title = "Direct evidence for cage conduction band in superconducting cement 12CaO.7Al2O3 by low-energy high-resolution photoemission spectroscopy",

abstract = "We have performed low-energy high-resolution photoemission spectroscopy of a superconducting cement 12CaO.7Al2O3 (C12A7). By using the bulk-sensitive xenon-plasma light, we clearly observed a small but well-defined peak at the Fermi level (EF). Comparison with the band calculations suggests that the observed near-EF peak is ascribed to the conduction electrons distributed over the crystal cages responsible for the metallic nature and superconductivity of C12A7.",

keywords = "12CaO.7AlO, Electronic structure, Photoemission spectroscopy, Superconductivity",

author = "Seigo Souma and Toshiyuki Arakane and Takafumi Sato and Takashi Takahashi and Kim, {Sung Wng} and Satoru Matsuishi and Hideo Hosono",

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T1 - Direct evidence for cage conduction band in superconducting cement 12CaO.7Al2O3 by low-energy high-resolution photoemission spectroscopy

AU - Souma, Seigo

AU - Arakane, Toshiyuki

AU - Sato, Takafumi

AU - Takahashi, Takashi

AU - Kim, Sung Wng

AU - Matsuishi, Satoru

AU - Hosono, Hideo

PY - 2010/10

Y1 - 2010/10

N2 - We have performed low-energy high-resolution photoemission spectroscopy of a superconducting cement 12CaO.7Al2O3 (C12A7). By using the bulk-sensitive xenon-plasma light, we clearly observed a small but well-defined peak at the Fermi level (EF). Comparison with the band calculations suggests that the observed near-EF peak is ascribed to the conduction electrons distributed over the crystal cages responsible for the metallic nature and superconductivity of C12A7.

AB - We have performed low-energy high-resolution photoemission spectroscopy of a superconducting cement 12CaO.7Al2O3 (C12A7). By using the bulk-sensitive xenon-plasma light, we clearly observed a small but well-defined peak at the Fermi level (EF). Comparison with the band calculations suggests that the observed near-EF peak is ascribed to the conduction electrons distributed over the crystal cages responsible for the metallic nature and superconductivity of C12A7.

KW - 12CaO.7AlO

KW - Electronic structure

KW - Photoemission spectroscopy

KW - Superconductivity

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