Quantum diffusion regime of the charge transport in GdB6 caused by electron and lattice instability
Abstract
Based on accurate X-ray structure analysis of GdB6 over the temperature range 85-300 K it has been shown that anomalously strong charge carrier scattering in the quantum diffusion regime of charge transport in this compound arises due to the formation of (i) dynamically coupled Gd3+ dimers of about 3.3 {\AA} in size with an energy of quasi-local oscillations ~ 7 - 8 meV and (ii) dynamic charge stripes along the [001] direction of the cubic lattice. It has been revealed that anharmonic approximation is useful when analyzing the static and dynamic components of the atomic displacement parameters of gadolinium. The barrier height of double-well potential of Gd3+ ions was determined both from low-temperature heat capacity measurements and from the electron density distribution reconstructed from X-ray data.
Keywords
Cite
@article{arxiv.1904.07130,
title = {Quantum diffusion regime of the charge transport in GdB6 caused by electron and lattice instability},
author = {Alexander P. Dudka and Olga N. Khrykina and Nadezhda B. Bolotina and Natalya Yu. Shitsevalova and Volodymyr B. Filipov and Mikhail A. Anisimov and Slavomir Gabani and Karol Flachbart and Nikolay E. Sluchanko},
journal= {arXiv preprint arXiv:1904.07130},
year = {2019}
}
Comments
13 pages, 5 figures