The electron-phonon interaction at deep Bi 2 Te3-semiconductor interfaces from Brillouin light scattering
Journal article, 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.

Author

M. Wiesner

Adam Mickiewicz University in Poznań

A. Trzaskowska

Adam Mickiewicz University in Poznań

B. Mroz

Adam Mickiewicz University in Poznań

Sophie Charpentier

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

S. Wang

Chinese Academy of Sciences

Yuxin Song

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Floriana Lombardi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

P. Lucignano

Universita degli Studi di Napoli Federico II

Superconductors, oxides and other innovative materials and devices

G. Benedek

Donostia International Physics Center

D. Campi

University of Milano-Bicocca

M. Bernasconi

University of Milano-Bicocca

Francisco Guinea

University of Manchester

IMDEA Nanociencia

A. Tagliacozzo

Universita degli Studi di Napoli Federico II

Laboratori Nazionali di Frascati di INFN

Superconductors, oxides and other innovative materials and devices

Scientific Reports

2045-2322 (ISSN)

Vol. 7 1 16449

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1038/s41598-017-16313-5

More information

Latest update

7/5/2018 8