- Abstract:
-
Using femtosecond time- and angle-resolved photoemission spectroscopy, we investigated the nonequilibrium dynamics of the topological insulator Bi2Se3. We studied p-type Bi2Se3, in which the metallic Dirac surface state and bulk conduction bands are unoccupied. Optical excitation leads to a metastable population at the bulk conduction band edge, which feeds a nonequilibrium population of the surface state persisting for >10 ps. This unusually long-lived population of a metallic Dirac surfa...
Expand abstract - Publication status:
- Published
- Publisher copy:
- 10.1103/physrevlett.108.117403
-
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- Journal:
- Physical review letters
- Volume:
- 108
- Issue:
- 11
- Pages:
- 117403
- Publication date:
- 2012-03-05
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
- URN:
-
uuid:ac7bc455-d5e4-4a62-ac0f-ba4d65c2c1fc
- Source identifiers:
-
323516
- Local pid:
- pubs:323516
- Language:
- English
- Copyright date:
- 2012
Journal article
Ultrafast optical excitation of a persistent surface-state population in the topological insulator Bi2Se3.
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