Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 75: Poster Session: Transport 1
TT 75.29: Poster
Donnerstag, 23. März 2017, 15:00–19:00, P2-EG
Coherent exciton transport in double-bilayer graphene — •Bogusz Bujnowski1, Dario Bercioux1,2, Jerôme Cayssol3, and Sebastian Bergeret1,4 — 1Donostia International Physics Center (DIPC) - Manuel de Lardizabal 5, E-20018 San Sebastián, Spain — 2IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain — 3LOMA (UMR-5798), CNRS and Université Bordeaux - F-33045 Talence, France — 4Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU E-20018 Donostia-San Sebastián, Basque Country, Spain
We study exciton condensate formation and coherent transport in a system of two graphene bilayers that are separated by hexagonal boron-nitride. A variety of excitonic-phases has been identified by varying separately the carrier density in the graphene sheets of each bilayer as well as the distance between the bilayer sheets [1]. The richness of the phase diagram could be the key to understand the interesting transport properties observed in recent experiments [2,3]. We aim to explain some key experimental features in terms of peculiar transport properties associated to excitonic condensates [4].
[1] J. Su and A.H. MacDonald, arXiv:1611.06410 (2016).
[2] J.I.A. Li et al., Phys. Rev. Lett., 117 046802 (2016).
[3] K. Lee et al., Phys. Rev. Lett. 117, 046803 (2016).
[4] M. Rontani & L. J. Sham, Phys. Rev. Lett. 94, 186404 (2005).