Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4879831
Keywords
-
Categories
Funding
- Singapore National Research Foundation [RCA-08/018]
- Singapore Ministry of Education AcRF [MOE2010-T2-2-059, RG 13/12, ARC 23/08]
- National Research Foundation [NRF-CRP4-2008-04]
- National Nuclear Security Administration of the U.S. DOE at LANL [DE-AC52-06NA25396]
- Center for Integrated Nanotechnologies, a U.S. DOE Office of Basic Energy Sciences user facility
Ask authors/readers for more resources
Using ultrafast optical pump-probe technique, we studied the temperature-dependent carrier and phonon dynamics of the topological insulator Bi1.5Sb0.5Te1.8Se1.2 single-crystal from 10K to 300 K. Two relaxation processes of carriers and coherent optical/acoustic phonons have been observed. By using the two-temperature model, we are able to attribute the fast (similar to ps) relaxation component to carrier-phonon coupling involving carriers in the conduction band. We also studied the temperature dependence of the dephasing time and frequency of optical phonon, and the optical penetration depth of Bi1.5Sb0.5Te1.8Se1.2. (C) 2014 AIP Publishing LLC.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available