Observation Of Infrared-Active Modes In Raman Scattering From Topological Insulator Nanoplates

Authors

Rui He, University of Northern Iowa
Zhenhua Wang, Case Western Reserve UniversityFollow
Richard L.J. Qiu, Case Western Reserve UniversityFollow
Conor Delaney, University of Northern IowaFollow
Ben Beck, University of Northern IowaFollow
T. E. Kidd, University of Northern IowaFollow
C. C. Chancey, University of Northern Iowa
Xuan P.A. Gao, Case Western Reserve UniversityFollow

Document Type

Article

Journal/Book/Conference Title

Nanotechnology

Volume

23

Issue

45

Abstract

Two infrared (IR)-active vibrational modes, observed at 93 and 113cm 1 in Raman scattering, are evidence of an inversion symmetry breakdown in thin (10nm) nanoplates of topological insulator Bi 2Te3 as-grown on SiO2. Both Raman and IR modes are preserved after typical device fabrication processes. In nanoplates transferred to another SiO2 substrate via contact printing, however, the IR modes are absent, and the Raman spectra are similar to those from bulk samples. The differences between as-grown and transferred nanoplates may result from nanoplate-substrate interactions. © 2012 IOP Publishing Ltd.

Department

Department of Physics

Original Publication Date

11-16-2012

DOI of published version

10.1088/0957-4484/23/45/455703

Recommended Citation

He, Rui; Wang, Zhenhua; Qiu, Richard L.J.; Delaney, Conor; Beck, Ben; Kidd, T. E.; Chancey, C. C.; and Gao, Xuan P.A., "Observation Of Infrared-Active Modes In Raman Scattering From Topological Insulator Nanoplates" (2012). Faculty Publications. 1724.
https://scholarworks.uni.edu/facpub/1724