Self-consistent modeling of thermal and elastic properties of unconventional superconductor PuCoGa5 / Filanovich A. N.,Povzner A. A. // PHYSICA B-CONDENSED MATTER. - 2016. - V. 491, l. . - P. 17-21.

ISSN/EISSN:

0921-4526 / 1873-2135

Type:

Article

Abstract:

A self-consistent thermodynamic model of PuCoGa5 is developed, which for the first time takes into account the anharmonicity of both acoustic phonons, described within a Debye model, and optical phonons, considered in an Einstein approximation. Within the framework of this model, we have calculated the temperature dependencies of lattice contributions to heat capacity, bulk modulus, volumetric coefficient of thermal expansion, Debye and Einstein temperatures and their Grfineisen parameters. The electronic heat capacity of PuCoGa5 is obtained, which demonstrates an unusual temperature dependence with two maxima. In addition, it is shown that an abnormal low temperature behavior of the bulk modulus of PuCoGa5 is not caused by the effects of lattice anharmonicity and is most likely due to the valence fluctuations, which is in agreement with previous studies. (C) 2016 Elsevier B.V. All rights reserved.

Author keywords:

Thermodynamic simulations; Thermodynamic properties; Heat capacity; Elastic properties; Phonon anharmonicity; Superconductors GRUNEISEN PARAMETERS; TEMPERATURE; PLUTONIUM; SPECTROSCOPY; TRANSITION

DOI:

10.1016/j.physb.2016.03.026

Web of Science ID:

ISI:000373986800003

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-2135
Keywords-Plus	GRUNEISEN PARAMETERS; TEMPERATURE; PLUTONIUM; SPECTROSCOPY; TRANSITION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	a.n.filanovich@urfu.ru a.a.povzner@urfu.ru
ResearcherID-Numbers	Povzner, Aleksandr/A-4625-2016
Funding-Acknowledgement	Ministry of education and science of Russian Federation {[}3.1236.2014/K]
Funding-Text	The results were obtained in the framework of the task of The Ministry of education and science of Russian Federation, contract 3.1236.2014/K
Number-of-Cited-References	15
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	17
Journal-ISO	Physica B
Doc-Delivery-Number	DJ1TJ