Room-Temperature Quantum Transport Signatures in Graphene/LaAlO3 /SrTiO3 Heterostructures

Giriraj Jnawali; Mengchen Huang; Jen-Feng Hsu; Hyungwoo Lee; Jung-Woo Lee; Patrick Irvin; Chang-Beom Eom; Brian D'Urso; Jeremy Levy

doi:10.1002/adma.201603488

Room-Temperature Quantum Transport Signatures in Graphene/LaAlO₃ /SrTiO₃ Heterostructures

Adv Mater. 2017 Mar;29(9). doi: 10.1002/adma.201603488. Epub 2017 Jan 2.

Authors

Giriraj Jnawali^{1

2}, Mengchen Huang^{1

2}, Jen-Feng Hsu^{1

2}, Hyungwoo Lee³, Jung-Woo Lee³, Patrick Irvin^{1

2}, Chang-Beom Eom³, Brian D'Urso^{1

2}, Jeremy Levy^{1

2}

Affiliations

¹ Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
² Pittsburgh Quantum Institute, Pittsburgh, PA, 15260, USA.
³ Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA.

PMID: 28042885
DOI: 10.1002/adma.201603488

Abstract

High mobility graphene field-effect devices, fabricated on the complex-oxide heterostructure LaAlO₃ /SrTiO₃ , exhibit quantum interference signatures up to room temperature. The oxide material is believed to play a critical role in suppressing short-range and phonon contributions to scattering. The ability to maintain pseudospin coherence at room temperature holds promise for the realization of new classical and quantum information technologies.

Keywords: complex-oxides; graphene; pseudospin; quantum interference; weak antilocalization.