Effect of pressure on the size of energy gap in semiconducting mixed-valent rare-earth compounds

S. Yoshii, M. Kasaya, H. Takahashi, N. Mori

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

We have synthesized CeRhBi and CeRhAs and found that these compounds crystallize in the ε-TiNiSi-type structure. It is found that CeRhBi is a heavy-fermion compound, whereas CeRhAs is a mixed-valent semiconductor with an energy gap of 144 K, about 10 times larger than that of CeRhSb. Various experimental results throughout the CeRhX series also vary in the sequence CeRh (Bi-Sb-As). However, the gap observed in CeRhAs is suppressed by external-pressure, suggesting that the chemical and the external pressure seem to cause opposite effects on the size of energy gap in these compounds. These results are compared with those for mixed-valent semiconductors Ce3Pt3Bi4 and Ce3Pt3Sb4.

Original languageEnglish
Pages (from-to)421-425
Number of pages5
JournalPhysica B: Condensed Matter
Volume223-224
Issue number1-4
DOIs
Publication statusPublished - 1996 Jun 2

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Effect of pressure on the size of energy gap in semiconducting mixed-valent rare-earth compounds'. Together they form a unique fingerprint.

  • Cite this