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Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO₃/SrTiO₃ interface
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Large modulation of the Shubnikov-de Haas oscillations by the Rashba interaction at the LaAlO₃/SrTiO₃ interface
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We investigate the 2-dimensional Fermi surface of high-mobility LaAlO$_3$/SrTiO$_3$ interfaces using Shubnikov-de Haas oscillations. Our analysis of the oscillation pattern underscores the key role played by the Rashba spin-orbit interaction brought about by the breaking of inversion symmetry, as well as the dominant contribution of the heavy $d_{xz}$/$d_{yz}$ orbitals on electrical transport. We furthermore bring into light the complex evolution of the oscillations with the carrier density, which is tuned by the field effect.
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