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Field-Tuning of the electron and hole populations in the ruthenate Bi_3Ru_3O_11 | | Wei-Li Lee
; M.K. Hass
; G. Lawes
; A.P. Remirez
; R.J. Cava
; N.P. Ong
; | | Date: |
19 May 2003 | | Journal: | Europhys. Lett. 63, 860 (2003). | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | Experiments on the Hall coefficient R_H and heat capactity C reveal an unusual, compensated electronic ground state in the ruthenate Bi_3Ru_3O_11. At low temperature T, 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 gamma(T). We discuss shifts of the electron and hole chemical potentials by H to interpret the observed behavior of R_H. | | Source: | arXiv, cond-mat/0305451 | | Services: | Forum | Review | PDF | Favorites | |
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