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Spin textures of strongly correlated spin Hall quantum dots
Authors:Giacomo Dolcetto  Niccolò Traverso Ziani  Matteo Biggio  Fabio Cavaliere  Maura Sassetti
Institution:1. Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy;2. CNR‐SPIN, Via Dodecaneso 33, 16146 Genova, Italy;3. INFN, Via Dodecaneso 33, 16146 Genova, Italy;4. Dipartimento di Ingegneria Navale, Elettrica, Elettronica e delle Telecomunicazioni, Università di Genova, Via Opera Pia 11a, 16145 Genova, Italy
Abstract:We study the spin ordering of a quantum dot defined via magnetic barriers in an interacting quantum spin Hall edge. The spin‐resolved density–density correlation functions are computed. We show that strong electron interactions induce a ground state with a highly correlated spin pattern. The crossover from the liquid‐type correlations at weak interactions to the ground state spin texture found at strong interactions parallels the formation of a one‐dimensional Wigner molecule in an ordinary strongly interacting quantum dot.
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Keywords:spin correlations  quantum spin Hall effect  topological insulators
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