Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.issp.ac.ru/lpcbc/ABST/2_25.html
Дата изменения: Fri Dec 24 09:29:05 1999
Дата индексирования: Tue Oct 2 02:13:46 2012
Кодировка:
Поисковые слова: marsodyssey
F.Yu, V.N. Kopylov, M.B. Salamon,
N.N. Kolesnikov, M.A. Hubbard, H.M. Duan, A.M. Hermann. Field dependent thermal conductivity of Tl2Ba2CuO6:
evidence for Andreev scattering of quasiparticles.
Abstract: We have studied the thermal conductivity of
Tl2Ba2CuO6 (Tl-2201) crystals
as functions of temperature and magnetic field. A thermal conductivity
peak is observed near 0.6 Tcwhich is greatly reduced
on application of a magnetic field along the c axis. We argue that
the suppression of the peak at relatively low fields (£
8 T<< Hc2) permits us to separate
electronic and phononic contributions. Fields applied in plane are less
effective, but give the same reduction when applied either parallel or
perpendicular to the temperature gradient. A model based on Andreev reflection
by vortex screening currents is shown to be consistent with these results.