The electron-phonon interaction at deep Bi 2 Te3-semiconductor interfaces from Brillouin light scattering
Artikel i vetenskaplig tidskrift, 2017
It is shown that the electron-phonon interaction at a conducting interface between a topological insulator thin film and a semiconductor substrate can be directly probed by means of high-resolution Brillouin light scattering (BLS). The observation of Kohn anomalies in the surface phonon dispersion curves of a 50 nm thick Bi2Te3 film on GaAs, besides demonstrating important electron-phonon coupling effects in the GHz frequency domain, shows that information on deep interface electrons can be obtained by tuning the penetration depth of optically-generated surface phonons so as to selectively probe the interface region, as in a sort of quantum sonar.
Författare
M. Wiesner
Uniwersytet im. Adama Mickiewicza w Poznaniu
A. Trzaskowska
Uniwersytet im. Adama Mickiewicza w Poznaniu
B. Mroz
Uniwersytet im. Adama Mickiewicza w Poznaniu
Sophie Charpentier
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
S. Wang
Chinese Academy of Sciences
Yuxin Song
Chalmers, Mikroteknologi och nanovetenskap, Fotonik
Floriana Lombardi
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
P. Lucignano
Superconductors, oxides and other innovative materials and devices
Universita degli Studi di Napoli Federico II
G. Benedek
Donostia International Physics Center
D. Campi
Universita' degli Studi di Milano-Bicocca
M. Bernasconi
Universita' degli Studi di Milano-Bicocca
Francisco Guinea
University of Manchester
IMDEA Nanoscience Institute
A. Tagliacozzo
Laboratori Nazionali di Frascati di INFN
Superconductors, oxides and other innovative materials and devices
Universita degli Studi di Napoli Federico II
Scientific Reports
2045-2322 (ISSN) 20452322 (eISSN)
Vol. 7 1 16449Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)
Europeiska kommissionen (EU) (EC/FP7/604391), 2013-10-01 -- 2016-03-31.
Ämneskategorier
Elektroteknik och elektronik
Den kondenserade materiens fysik
DOI
10.1038/s41598-017-16313-5