Ultrafast photocurrents at the surface of the three-dimensional topological insulator Bi2Se3
Surface currents in topological insulators can be controlled by light, but the underlying mechanisms are not well understood. Here, Braun et al. report an ultrafast shift photocurrent at the surface of Ca-doped Bi2Se3, whereas injection currents are much smaller than expected from asymmetric depopul...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2016-10-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/ncomms13259 |