22nd International Conference on Low Temperature Physics, Date: 1999/08/04 - 1999/08/11, Location: FINLAND, HELSINKI UNIV TECHNOL, HELSINKI
Physica B
Author:
Keywords:
excitons, intermediate valence, intermediate-valence, hybridization, Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, INTERMEDIATE-VALENCE, HYBRIDIZATION, 0204 Condensed Matter Physics, 0206 Quantum Physics, 0303 Macromolecular and Materials Chemistry, General Physics, 5104 Condensed matter physics
Abstract:
Low-temperature transport has been studied in steady and pulsed magnetic field on a single crystal of SmB6. Measurements in the range of intrinsic conduction allowed us to determine the indirect gap E-g approximate to 20 meV and microscopic parameters of carriers. The results obtained in the region of extrinsic conduction are discussed within the Kikoin-Mishchenko polaron-exciton model of charge fluctuations with short-range excitonic states E-ex approximate to 3.5 meV, R-ex approximate to 6 Angstrom. (C) 2000 Elsevier Science B.V. All rights reserved.