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Disentangling the magnetoelectric and thermoelectric transport in topological insulator thin films
- Source :
- Physical Review B 91, 075431 (2015)
- Publication Year :
- 2015
-
Abstract
- We report transport studies on (Bi,Sb)2Te3 topological insulator thin films with tunable electronic band structure. We find a doping and temperature regime in which the Hall coefficient is negative indicative of electron-type carriers, whereas the Seebeck coefficient is positive indicative of hole-type carriers. This sign anomaly is due to the distinct transport behaviors of the bulk and surface states: the surface Dirac fermions dominate magnetoelectric transport while the thermoelectric effect is mainly determined by the bulk states. These findings may inspire new ideas for designing topological insulator-based high efficiency thermoelectric devices.<br />Comment: 9 figures
Details
- Database :
- arXiv
- Journal :
- Physical Review B 91, 075431 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1502.07794
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.91.075431