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- W2744281128 abstract "Spin-orbit coupling is a single-particle phenomenon known to generate topological order, and electron-electron interactions cause ordered many-body phases to exist. The rich interplay of these two mechanisms is present in a broad range of materials and has been the subject of considerable ongoing research and controversy. Here we demonstrate that interacting two-dimensional electron systems with strong spin-orbit coupling exhibit a variety of time reversal symmetry breaking phases with unconventional spin alignment. We first prove that a Stoner-type criterion can be formulated for the spin polarization response to an electric field, which predicts that the spin polarization susceptibility diverges at a certain value of the electron-electron interaction strength. The divergence indicates the possibility of unconventional ferromagnetic phases even in the absence of any applied electric or magnetic field. This leads us, in the second part of this work, to study interacting Rashba spin-orbit coupled semiconductors in equilibrium in the Hartree-Fock approximation as a generic minimal model. Using classical Monte Carlo simulations, we construct the complete phase diagram of the system as a function of density and spin-orbit coupling strength. It includes both an out-of-plane spin-polarized phase and in-plane spin-polarized phases with shifted Fermi surfaces and rich spin textures, reminiscent of the Pomeranchuk instability, as well as two different Fermi-liquid phases having one and two Fermi surfaces, respectively, which are separated by a Lifshitz transition. We discuss possibilities for experimental observation and useful application of these novel phases, especially in the context of electric-field-controlled macroscopic spin polarizations." @default.
- W2744281128 created "2017-08-17" @default.
- W2744281128 creator A5001373060 @default.
- W2744281128 creator A5002700041 @default.
- W2744281128 creator A5009562687 @default.
- W2744281128 creator A5010732219 @default.
- W2744281128 creator A5071169424 @default.
- W2744281128 creator A5077082959 @default.
- W2744281128 creator A5085811585 @default.
- W2744281128 date "2017-12-14" @default.
- W2744281128 modified "2023-10-10" @default.
- W2744281128 title "Generalized Stoner criterion and versatile spin ordering in two-dimensional spin-orbit coupled electron systems" @default.
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