Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3

Details Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3 Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3

2012-03-16

arxiv.org/abs/1203.3616v1

Phys. Rev. Lett. 108, 117403 (2012)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevLett.108.117403

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 meta-stable population at the bulk conduction band edge, which feeds a nonequilibrium population of the surface state persisting for >10ps. This unusually long-lived population of a metallic Dirac surface state with spin texture may present a channel in which to drive transient spin-polarized currents.

Affiliated with

Also associated with

No associations

Rating

Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrafast Optical Excitation of a Persistent Surface-State Population in the Topological Insulator Bi2Se3 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-349276