Details

Autor(en) / Beteiligte

• Kellner, Jens
• Eschbach, Markus
• Kampmeier, Jörn
• Lanius, Martin
• Młyńczak, Ewa
• Mussler, Gregor
• Holländer, Bernhard
• Plucinski, Lukasz
• Liebmann, Marcus
• Grützmacher, Detlev
• Schneider, Claus M.
• Morgenstern, Markus

Titel

Tuning the Dirac point to the Fermi level in the ternary topological insulator (Bi1− x Sb x )2Te3

Ist Teil von

• Applied physics letters, 2015-12, Vol.107 (25)

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2015

Quelle

Scitation (American Institute of Physics)

Beschreibungen/Notizen

• In order to stabilize Majorana excitations within vortices of proximity induced topological superconductors, it is mandatory that the Dirac point matches the Fermi level rather exactly, such that the conventionally confined states within the vortex are well separated from the Majorana-type excitation. Here, we show by angle resolved photoelectron spectroscopy that (Bi1−xSbx)2Te3 thin films with x = 0.94 prepared by molecular beam epitaxy and transferred in ultrahigh vacuum from the molecular beam epitaxy system to the photoemission setup match this condition. The Dirac point is within 10 meV around the Fermi level, and we do not observe any bulk bands intersecting the Fermi level.