Quantum diffusion regime of charge transport in Gd B6 caused by electron and lattice instability
Abstract
Based on accurate x-ray structure analysis of Gd B6 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 G d3 + pairs of about 3.3 Å in size and with energy of quasilocal oscillations ∼7-8 meV, and due to (ii) dynamic charge stripes along the [001] direction of the cubic lattice. It has been shown that the anharmonic approximation is appropriate when analyzing the static and dynamic components of the atomic displacement parameters of gadolinium. The barrier height of double-well potential of G d3 + ions was determined both from low-temperature heat capacity measurements and from the electron density distribution reconstructed from x-ray data.
- Publication:
-
Physical Review B
- Pub Date:
- November 2019
- DOI:
- 10.1103/PhysRevB.100.205103
- arXiv:
- arXiv:1904.07130
- Bibcode:
- 2019PhRvB.100t5103D
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 13 pages, 5 figures