Two Distinct Classes of Tunnelling States in CN - -Doped KBr

Autor:	H. Schwoerer, M. v. Schickfus, D. Arndt, G. Weiss, Christian Enss
Rok vydání:	1994
Předmět:	Permittivity Tunnel effect Materials science Thermal Doping General Physics and Astronomy Dielectric Atmospheric temperature range Molecular physics Quantum tunnelling Microwave
Zdroj:	Europhysics Letters (EPL). 26:289-294
ISSN:	1286-4854 0295-5075
Popis:	We have investigated the low-temperature behaviour of the dielectric constant of the mixed crystal (KBr)1-x(KCN)x for x = 0.01 and x = 0.001. The experiments were performed at microwave frequencies between 150 and 1227 MHz in the temperature range from 0.015 K to 10 K. Our experiments prove the existence of tunnelling states with a very small and narrowly distributed energy splitting near E/kB = 10 mK for x = 0.001. E increases with CN- concentration and reaches E/kB = 40 mK for x = 0.01. These states occur in addition to those at 1 K, well known from thermal experiments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::772e7f2045dfd435d867ba34ee310904 https://doi.org/10.1209/0295-5075/26/4/009 Zobrazit plný text záznamu