Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 76: Poster Session: Transport 2
TT 76.25: Poster
Donnerstag, 23. März 2017, 15:00–19:00, P2-OG1
Low-temperature heat transport of the topological superconductor CuxBi2Se3 — •Lionel Andersen, Zhiwei Wang, Thomas Lorenz, and Yoichi Ando — II. Physikalisches Institut - Universität zu Köln, Germany
The topological insulator Bi2Se3 becomes superconducting when intercalated with copper. Recently the interest in this material was heightened by the confirmation of the topological superconductivity through observations of a rotational symmetry braking [1,2].
A manifestation of Majorana fermions is predicted to be a ballistic surface heat transport [3]. This could provide a possibility of a direct macroscopic observation of these exotic surface states by standard heat transport measurements. For these measurements, a disentanglement of the contributions from phonons, surface Majorana fermions and bulk quasiparticles is required. In this poster, measurements of the heat transport of CuxBi2Se3 performed in a dilution refrigerator will be presented.
[1] K. Matano et al., Nat. Phys. 12, 852 (2016)
[2] S. Yonezawa et al., Nat. Phys. DOI: 10.1038/NPHYS3907 (2016)
[3] L. Kouvenhoven and C. Beenakker, Nat. Phys. 12, 618 (2016)