caa a22 4500 445365854 CHVBK 20180317142930.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0315-z doi (NATIONALLICENCE)springer-10.1007/s10909-010-0315-z Thermal Conductivity of Glasses Induced by Nuclear Quadrupole Interaction at Ultra Low Temperatures [Elektronische Daten] [I. Polishchuk, A. Burin] It is investigated how nuclear degrees of freedom of tunneling system (TS) inherent in amorphous solids influence its acoustic properties. It was shown in our previous papers that below 10 mK nuclear quadrupole interaction breaks down the coherent tunneling. This phenomenon results in appearance of the quasi-gap in the distribution function for the tunneling amplitude splitting. The quasi-gap is responsible for the plateau in the temperature dependence of the real part of a dielectric permittivity or speed of sound. In this paper we are interested in ultrasonic absorption and thermal conductivity which are intimately connected. We demonstrate that there exists a temperature interval in a millikelvin region where the sound absorption behavior changes drastically from the behavior predicted by the standard tunneling model (STM). In particular, the sound absorption increases approximately by an order of magnitude. Since in the millikelvin region the heat transport is due to acoustic phonons, the thermal conductivity also should demonstrate a strong increase as compared to standard tunneling model. The application of a strong magnetic field is known to restore the coherent tunneling and the standard distribution for the tunneling splitting amplitude. Thus, one can expect that in a strong magnetic field the thermal conductivity should drop in the temperature interval where the coherent tunneling was initially destroyed. Springer Science+Business Media, LLC, 2010 Ultra cold glasses nationallicence Nuclear quadrupole nationallicence Thermal conductivity nationallicence Polishchuk I. Kurchatov Institute, Kurchatov Sq. 1, 123182, Moscow, Russia aut Burin A. Department of Chemistry, Tulane University, 70118, New Orleans, LA, USA aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 509-515 0022-2291 162:5-6<509 2011 162 10909 https://doi.org/10.1007/s10909-010-0315-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0315-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Polishchuk I. Kurchatov Institute, Kurchatov Sq. 1, 123182, Moscow, Russia aut NATIONALLICENCE 700 1- Burin A. Department of Chemistry, Tulane University, 70118, New Orleans, LA, USA aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 509-515 0022-2291 162:5-6<509 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer