Details

Autor(en) / Beteiligte

• Kuroda, K
• Arita, M
• Miyamoto, K
• Ye, M
• Jiang, J
• Kimura, A
• Krasovskii, E E
• Chulkov, E V
• Iwasawa, H
• Okuda, T
• Shimada, K
• Ueda, Y
• Namatame, H
• Taniguchi, M

Titel

Hexagonally deformed Fermi surface of the 3D topological insulator Bi2Se3

Ist Teil von

• Physical review letters, 2010-08, Vol.105 (7), p.076802-076802

Ort / Verlag

United States

Erscheinungsjahr

2010

Link zum Volltext

Quelle

APS_美国物理学会过刊

Beschreibungen/Notizen

• A hexagonal deformation of the Fermi surface of Bi2Se3 has been for the first time observed by angle-resolved photoemission spectroscopy. This is in contrast to the general belief that Bi2Se3 possesses an ideal Dirac cone. The hexagonal shape is found to disappear near the Dirac node, which would protect the surface state electrons from backscattering. It is also demonstrated that the Fermi energy of naturally electron-doped Bi2Se3 can be tuned by 1% Mg doping in order to realize the quantum topological transport.