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Effect of proximity-induced spin-orbit coupling in graphene mesoscopic billiards

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Publication details

JournalPhysical Review B
DateAccepted/In press - 11 Feb 2021
DateE-pub ahead of print (current) - 24 Feb 2021
Early online date24/02/21
Original languageEnglish


van der Waals heterostructures based on two-dimensional materials have recently become a very active topic of research in spintronics, both aiming at a fundamental description of spin dephasing processes in nanostructures and as a potential element in spin-based information processing schemes. Here, we theoretically investigate the magnetoconductance of mesoscopic devices built from graphene proximity-coupled to a high spin-orbit coupling material. Through numerically exact tight-binding simulations, we show that the interfacial breaking of inversion symmetry generates robust weak antilocalization even when the z → −z symmetric spin-orbit coupling in the quantum dot dominates over the Bychkov-Rashba interaction. Our findings are interpreted in the light of random matrix theory, which links the observed behavior of quantum interference corrections to a transition from a circular-orthogonal to circular-symplectic ensemble.

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©2021 American Physical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

    Research areas

  • graphene, quantum transport, spin orbit coupling, mesoscopic devices, universal conductance fluctuations, van der Waals heterostructures


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