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Tunable Rashba Spin-Orbit Interaction at Oxide Interfaces

Authors
Gabay, M.
Published in Physical Review Letters. 2010, vol. 104, no. 12, p. 126803
Abstract The quasi-two-dimensional electron gas found at the LaAlO3/SrTiO3 interface offers exciting new functionalities, such as tunable superconductivity, and has been proposed as a new nanoelectronics fabrication platform. Here we lay out a new example of an electronic property arising from the interfacial breaking of inversion symmetry, namely, a large Rashba spin-orbit interaction, whose magnitude can be modulated by the application of an external electric field. By means of magnetotransport experiments we explore the evolution of the spin-orbit coupling across the phase diagram of the system. We uncover a steep rise in Rashba interaction occurring around the doping level where a quantum critical point separates the insulating and superconducting ground states of the system.
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Research group Groupe Triscone
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CAVIGLIA, Andrea et al. Tunable Rashba Spin-Orbit Interaction at Oxide Interfaces. In: Physical Review Letters, 2010, vol. 104, n° 12, p. 126803. https://archive-ouverte.unige.ch/unige:23529

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Deposited on : 2012-10-24

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