Open AccessINFRARED DIVERGENCE RESPONSE IN REORIENTATIONAL RELAXATION PROCESS OF Al3+-HOLE IN α QUARTZ
Author(s) -
Liu Yan-Zhang,
Fan Xi-Qing
Publication year - 1994
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.43.332
Subject(s) - relaxation (psychology) , dielectric , materials science , dielectric loss , condensed matter physics , quantum tunnelling , superposition principle , cole–cole equation , impurity , nuclear magnetic resonance , infrared , quartz , chemistry , optics , physics , optoelectronics , organic chemistry , composite material , quantum mechanics , psychology , social psychology
The infrared divergence response theory is applied to reorientational relaxation process of Al3+-hole in α-quartz containing Al impurity to study the behaviour of low temperature dielectric relaxation loss properties in this system. Our calculation results showed that the single phononassisted tunneling process makes the main contribution to the dielectric loss for T10 K, the thermally activated relaxation process dominates the dielectric loss; as for 6.5 K < T<10 K, the dielectric loss is the superposition of the two relaxation process. It is pointed out that for the same relaxation unit, different relaxation process may have different infrared divergence response. The ultrasonic relaxation loss properties induced by the same relaxation unit is also discussed.