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Twisted exchange interaction between localized spins embedded in a one- or two-dimensional electron gas with Rashba spin-orbit coupling
Hiroshi Imamura, Patrick Bruno, Yasuhiro Utsumi
We study theoretically the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in one- and two-dimensions in presence of a Rashba spin-orbit (SO) coupling. We show that rotation of th…
Topological Hall effect and Berry phase in magnetic nanostructures
P. Bruno, V. K. Dugaev, M. Taillefumier
We discuss the anomalous Hall effect in a two-dimensional electron gas subject to a spatially varying magnetization. This topological Hall effect (THE) does not require any spin-or…
Indirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring
Yasuhiro Utsumi, Jan Martinek, Patrick Bruno +1
We investigate the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two spins located at two quantum dots embedded in an Aharonov-Bohm (AB) ring. In such a system the RKKY…
Bias-voltage dependence of the magneto-resistance in ballistic vacuum tunneling: Theory and application to planar Co(0001) junctions
J. Henk, P. Bruno
Motivated by first-principles results for jellium and by surface-barrier shapes that are typically used in electron spectroscopies, the bias voltage in ballistic vacuum tunneling i…
Spin polarization of the L-gap surface states on Au(111)
J. Henk, A. Ernst, P. Bruno
The electron spin polarization (ESP) of the L-gap surface states on Au(111) is investigated theoretically by means of first-principles electronic-structure and photoemission calcul…