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Evidence of layered transport of bulk carriers in Fe-doped Bi2Se3 topological insulators
- Source :
- Solid State Communications. 211:29-33
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- We observe quantized Hall plateaus and Shubnikov de Haas oscillations in 10 at% Fe-doped Bi2Se3 flakes. All the features of the quantum transport coincide while normalizing the field-angle variable magnetoresistance to the perpendicular direction. The Hall step gives a specific contribution of ~1 e2/h per quintuple layer. This reveals a two-dimensional (2D) transport of the bulk electrons in the topological insulators. The crystal is demonstrated with an obvious ferromagnetism. Further evidences including a Berry phase of zero, a weak localization and a large effective mass rule out the contribution of the topological surface states (SS), suggesting that a great care should be taken to pindown the transport of the topological SS in topological insulators.
- Subjects :
- Physics
Magnetoresistance
Condensed matter physics
General Chemistry
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Condensed Matter Physics
Weak localization
Effective mass (solid-state physics)
Geometric phase
Ferromagnetism
Topological insulator
Materials Chemistry
Topological order
Condensed Matter::Strongly Correlated Electrons
Surface states
Subjects
Details
- ISSN :
- 00381098
- Volume :
- 211
- Database :
- OpenAIRE
- Journal :
- Solid State Communications
- Accession number :
- edsair.doi...........0994c087047180bd70520e4eccf59dbc