Atomic structure of a 1T-TiSe2 surface layer from photoelectron and Auger electron holography data / Ogorodnikov I. I.,Vorokh A. S.,Titov A. N.,Kuznetsov M. V. // JETP LETTERS. - 2012. - V. 95, l. 7. - P. 372-379.

ISSN/EISSN:

0021-3640 / нет данных

Type:

Article

Abstract:

A three-dimensional (3D) reconstruction of the atomic structure of the (100) surface of a 1T-TiSe2 layered dichalcogenide crystal has been performed from X-ray photoelectron and Auger electron diffraction data. The diffraction patterns of the emission of Auger electrons of Se(LMM) selenium and photoelectrons of Ti2p titanium have been considered as holographic diagrams. Being processed with the scattering pattern extraction algorithm using the maximum entropy method (SPEA-MEM), they provide individual 3D images of the nearest environment of selenium and titanium atoms in the TiSe2 lattice. Using reconstructed 3D images, the positions of 128 atoms in the 2 x 2 x 1.5-nm region of the surface layer of TiSe2 have been determined. The structure of the surface has a 1T polytype. Interatomic distances in the layer and van der Waals gap are larger than the respective parameters in the bulk of the crystal. It is assumed that titanium layers in two Se-Ti-Se upper surface structural units are displaced along the {[}001] axis. The structure of the surface layer can be described by a unit cell of the P3 space group with the parameters a = 3.85 and c = 14.4 angstrom.

Author keywords:

DIFFRACTION

DOI:

10.1134/S0021364012070065

Web of Science ID:

ISI:000305239600007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	DIFFRACTION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	i\_ogorodnikov@mail.ru
ResearcherID-Numbers	Kuznetsov, Mikhail/N-4007-2014 Titov, Alexander/K-4328-2013 Vorokh, Andrey/D-1118-2010
ORCID-Numbers	Kuznetsov, Mikhail/0000-0002-4464-0355 Titov, Alexander/0000-0003-3636-2604 Vorokh, Andrey/0000-0002-2384-5378
Funding-Acknowledgement	Russian Foundation for Basic Research {[}10-03-96047\_r\_ural\_a, 11-03-00063\_a]
Funding-Text	This work was supported by the Russian Foundation for Basic Research (project nos. 10-03-96047\_r\_ural\_a and 11-03-00063\_a).
Number-of-Cited-References	23
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	46
Journal-ISO	Jetp Lett.
Doc-Delivery-Number	958LS