Structural parameters of intercalation compounds based on titanium dichalcogenides near the temperature of the polaronic band collapse / Shorikov DO,Titov AN,Titova SG,Tolochko BP // NUCLEAR INSTRUMENTS \& METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - 2001. - V. 470, l. 1-2. - P. 215-218.

ISSN/EISSN:

0168-9002 / нет данных

Type:

Article; Proceedings Paper

Abstract:

Using in-situ X-ray and synchrotron powder diffraction, the crystal structure of two types of materials, AgxTiTe2 and Fe0.2TiTe2, with charge carriers localized in form of small polarons, has been investigated in a temperature range including the point of polaronic band collapse (PBC). We have found that in case when the Fermi level is situated above the middle of the polaronic band, the PBC leads to lattice softness because of the increase of screening of interatomic interaction by localized electrons. When the Fermi level is situated between the middle and bottom of the polaronic band, the effect of PBC leads to a complicated temperature dependence on lattice properties due to several competitive factors: formation of a gap at the Fermi level because of impurity ordering, change of the screening condition because of electron localization and change of the vibration mode number because of structural phase transition of the order-disorder type. (C) 2001 Elsevier Science B.V. All rights reserved.

Author keywords:

intercalation compounds; polarons; polaronic band collapse; powder diffraction

DOI:

10.1016/S0168-9002(01)01044-0

Web of Science ID:

ISI:000170979000044

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP 1
Note	13th Conference on National Synchrotron Radiation, NOVOSIBIRSK, RUSSIA, JUL 17-21, 2000
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Research-Areas	Instruments \& Instrumentation; Nuclear Science \& Technology; Physics
Web-of-Science-Categories	Instruments \& Instrumentation; Nuclear Science \& Technology; Physics, Nuclear; Physics, Particles \& Fields
ResearcherID-Numbers	Titov, Alexander/K-4328-2013 Titova, Svetlana/D-2316-2013
ORCID-Numbers	Titov, Alexander/0000-0003-3636-2604
Number-of-Cited-References	6
Usage-Count-Since-2013	1
Journal-ISO	Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip.
Doc-Delivery-Number	472HX