Hysteresis of low temperature thermal conductivity, boson peak in glassy As2S3 and low frequency AsnSm nanocluster vibrations

Abstract

The origins of low temperature thermo conductivity and Boson peak are still remain open to question and are matter of debate [1-8] .We have studiedthermal conductivity in g-As2S3 between 2 and 100 K. Thermal conductivity is weakly temperature k(T) dependent from 2 to 10 K showing a plateau region during both cooling and heating (Fig. 1). The jump of value in k(T) dependence between cooling and heating cycles of g-As2S3 were discovered.