Anomalous Shift of Chemical Potential in the Double-Exchange Systems
- 15 August 1997
- journal article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 66 (8) , 2523-2524
- https://doi.org/10.1143/jpsj.66.2523
Abstract
Double-exchange system is investigated by the dynamical mean-field theory. We show that the chemical potential shifts as a function of temperature and magnetization, which is anomalously large. We also discuss the influences of dynamic Jahn-Teller effect to the shift of the chemical potential. Measurement of the shift of the chemical potential casts a constraint to theoretical approaches for the magnetoresistance phenomena in ($R$,$A$)MnO$_3$ such as double-exchange effects and dynamic Jahn-Teller effects. We also propose a method to measure the shift of $\mu$.Comment: Reference added, to be published in J. Phys. Soc. Jpn. Vol. 66 No.8 (Aug. 1997
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