Stability of the (0001) surface of the Bi2Se3 topological insulator

被引:0
作者
O. E. Tereshchenko
K. A. Kokh
V. V. Atuchin
K. N. Romanyuk
S. V. Makarenko
V. A. Golyashov
A. S. Kozhukhov
I. P. Prosvirin
A. A. Shklyaev
机构
[1] Russian Academy of Sciences,Institute of Semiconductor Physics, Siberian Branch
[2] Novosibirsk State University,Joint Institute of Geology, Geophysics, and Mineralogy, Siberian Branch
[3] Russian Academy of Sciences,Boreskov Institute of Catalysis, Siberian Branch
[4] Russian Academy of Sciences,undefined
来源
JETP Letters | 2011年 / 94卷
关键词
JETP Letter; Topological Insulator; Tunneling Conductance; Dirac Cone; Scanning Tunneling Spectroscopy;
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摘要
The inertness of the cleaved (0001) surface of a Bi2Se3 single crystal to oxidation has been demonstrated using X-ray photoelectron spectroscopy, as well as atomic-force and scanning tunneling microscopy and spectroscopy. No intrinsic bismuth and selenium oxides are formed on the surface after a month of storage in air. Atomically flat surfaces with macroscopic sizes (∼1 cm2) and rms roughness less than 0.1 nm have been prepared, and (1 × 1)-(0001) Bi2Se3 atomic structure has been resolved. The tunneling conductance measurements have shown that the energy dependence of the surface density of states is quasilinear in the band gap of Bi2Se3.
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页码:465 / 468
页数:3
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