Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 83: Heterostructures and Interfaces
O 83.10: Vortrag
Donnerstag, 10. März 2016, 12:15–12:30, H17
Hybrid structures of semi-metals, excitonic insulators and superconductors — •Dario Bercioux1,2 and Sebastian Bergeret1,3 — 1Donostia International Physics Center (DIPC), E-20018 San Sebastián, Spain — 2IKERBASQUE, Basque Foundation of Science, 48011 Bilbao, Spain — 3Centro de Física de Materiales (CFM-MPC) Centro Mixto CSIC-UPV/EHU, E-20018 Donostia-San Sebastian, Spain
Excitonic insulars are a condensate phase of matter investigated since the sixties [1]. They remain so far an elusive phase in solid state systems. Recent experiments on HgTe quantum wells with a width of circa 20 nm [2] hints at their observation. However, there is no common agreement on this point [3]. Combinations of excitonic insulators with superconductors should show evidence of Andreev processes due to the combination of two different type of condensates [4]. Here, we present results for hybrid structures combining semi-metals, excitonic insulators and superconductors and discuss phenomena related to the interplay between the two distinct condensates.
[1] D. Jérome, T. M. Rice, & W. Kohn, W., Phys. Rev. 158, 462 (1967).
[2] G. M. Minkov, et al., Phys. Rev. B 88, 155306 (2013).
[3] M. Knap, J. D. Sau, B. I. Halperin, & E. Demler, Phys. Rev. Lett. 113, 186801 (2014).
[4] F. Dolcini, et al., Phys. Rev. Lett. 104, 027004 (2010).