Enhancement of the Kondo effect through Rashba spin-orbit interactions |
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Authors: | Zarea Mahdi Ulloa Sergio E Sandler Nancy |
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Affiliation: | Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA. |
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Abstract: | We study a one-orbital Anderson impurity in a two-dimensional electron bath with Rashba spin-orbit interactions in the Kondo regime. The spin SU(2) symmetry-breaking term couples the impurity to a two-band electron gas. A Schrieffer-Wolff transformation shows the existence of the Dzyaloshinsky-Moriya interaction away from the particle-hole symmetric impurity state. A renormalization group analysis reveals a two-channel Kondo model with ferro- and antiferromagnetic couplings. The parity-breaking Dzyaloshinsky-Moriya term renormalizes the antiferromagnetic Kondo coupling with an exponential enhancement of the Kondo temperature. |
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