Surface Electronic Structure of Cr Doped Bi2Se3 Single Crystals
Here, by using angle-resolved photoemission spectroscopy, we showed that Bi2−xCrxSe3 single crystals have a distinctly well-defined band structure with a large bulk band gap and undistorted topological surface states. These spectral features are unlike their thin film forms in which a large nonmagnetic gap with a distorted band structure was reported. We further provide laser-based high resolution photoemission data which reveal a Dirac point gap even in the pristine sample. The gap becomes more pronounced with Cr doping into the bulk of Bi2Se3. These observations show that the Dirac point can be modified by the magnetic impurities as well as the light source.
Authors
- Genda Gu (ORCID: https://orcid.org/0000-0002-9886-3255)
- Zhongwei Dai (ORCID: https://orcid.org/0000-0001-5450-1060)
- Jerzy T. Sadowski (ORCID: https://orcid.org/0000-0002-4365-7796)
- Xiao Tong (ORCID: https://orcid.org/0000-0002-5567-9677)
- Turgut Yilmaz (ORCID: https://orcid.org/0000-0001-7571-0937)
- B. Sinković (ORCID: https://orcid.org/0000-0002-2741-9114)
- K. Shimada (ORCID: https://orcid.org/0000-0002-1945-2352)
- Kim Kisslinger (ORCID: https://orcid.org/0000-0002-6528-7044)
- E. Vescovo (ORCID: https://orcid.org/0000-0003-0350-3861)
- Sooyeon Hwang (ORCID: https://orcid.org/0000-0001-5606-6728)
Institutions
- Hiroshima University (JP)
- University of Connecticut (US)
- Brookhaven National Laboratory (US)
Publication Details
- Journal
- Crystals
- Published
- 2024-09-14
- DOI
- https://doi.org/10.3390/cryst14090812
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- Office of Science
- Basic Energy Sciences
- Brookhaven National Laboratory