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Indications of topological transport by universal conductance fluctuations in Bi2Te2Se microflakes.
- Source :
- Applied Physics Express; Jun2014, Vol. 7 Issue 6, p1-1, 1p
- Publication Year :
- 2014
-
Abstract
- Universal conductance fluctuations (UCFs) are extracted in the magnetoresistance responses in bulk-insulating Bi<subscript>2</subscript>Te<subscript>2</subscript>Se microflakes. Their two-dimensional character is demonstrated by field-tilting magnetoresistance measurements. Their origin from the surface electrons is determined by the fact that the UCF amplitudes remain unchanged while applying an in-plane field to suppress the coherence of bulk electrons. After considering the ensemble average in a batch of micrometer-sized samples, the intrinsic UCF magnitude of over 0.37 e<superscript>2</superscript>/h is obtained. This agrees with the theoretical prediction on topological surface states. All the lines of evidence point to the successful observation of the UCF of topological surface states. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18820778
- Volume :
- 7
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Applied Physics Express
- Publication Type :
- Academic Journal
- Accession number :
- 100195149
- Full Text :
- https://doi.org/10.7567/APEX.7.065202