High-pressure ground state of SmB6: Electronic conduction and long range magnetic order

A. Barla, J. Derr, J. P. Sanchez, B. Salce, G. Lapertot, B. P. Doyle, R. Rüffer, R. Lengsdorf, M. M. Abd-Elmeguid, J. Flouquet

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)

Abstract

High-pressure 149Sm nuclear forward scattering of synchrotron radiation and specific heat measurements have been performed on the intermediate valent Kondo insulator SmB6. The results show that at a critical pressure pc ≈ 6 GPa, where the charge gap closes, a first order transition occurs to a magnetically ordered state, which shows typical features of trivalent samarium compounds. The similarity with SmS stresses the role of local correlations and gives important insight into the debate on the local or itinerant character of the f electrons in heavy fermion systems.

Original languageEnglish
Article number166401
JournalPhysical Review Letters
Volume94
Issue number16
DOIs
Publication statusPublished - 29 Apr 2005
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

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