Field tuning of the electron and hole populations in the ruthenate Bi 3Ru3O11

Wei Li Lee, M. K. Haas, G. Lawes, A. P. Ramirez, R. J. Gava, N. P. Ong

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Experiments on the Hall coefficient RH and heat capacity C reveal an unusual, compensated electronic ground state in the ruthenate Bi 3Ru3O11. At low temperature T, R, R H decreases linearly with magnetic field |H for fields larger than the field scale set by the Zeeman energy, The results suggest that the electron and hole populations are tuned by H in opposite directions via coupling of the spins to the field. As T is decreased below 5 K, the curve C(T)/T vs. T 2 shows an anomalous flattening consistent with a rapidly growing Sommerfeld parameter γ(T). We discuss shifts of the electron and hole chemical potentials by H to interpret the observed behavior of RH.

Original languageEnglish (US)
Pages (from-to)860-866
Number of pages7
JournalEurophysics Letters
Volume63
Issue number6
DOIs
StatePublished - Sep 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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