title: Berry-phase effect in anomalous thermoelectric transport.
abstract: We develop a theory of the Berry-phase effect in anomalous transport in ferromagnets driven by statistical forces such as the gradient of temperature or chemical potential. Here a charge Hall current arises from the Berry-phase correction to the orbital magnetization rather than from the anomalous velocity, which does not exist in the absence of a mechanical force. A finite-temperature formula for the orbital magnetization is derived, which enables us to provide an explicit expression for the off-diagonal thermoelectric conductivity, to establish the Mott relation between the anomalous Nernst and Hall effects, and to reaffirm the Onsager relations between reciprocal thermoelectric conductivities. A first-principles evaluation of our expression is carried out for the material CuCr(2)Se(4-x)Br(x), obtaining quantitative agreement with a recent experiment.
authors.affiliation: Department of Physics, The University of Texas, Austin, 78712, USA.
authors.forename: Di
authors.initials: D
authors.lastname: Xiao
authors.forename: Yugui
authors.initials: Y
authors.lastname: Yao
authors.forename: Zhong
authors.initials: Z
authors.lastname: Fang
authors.forename: Qian
authors.initials: Q
authors.lastname: Niu