Size and temperature dependent ultrasonic properties of thermoelectric nanowires

作者：Dhawan Punit Kumar^*; Upadhyay Sanjay; Verma S K; Wan Meher; Yadav R R; Joshi B

来源：Materials Letters, 2014, 114: 15-18.

DOI：10.1016/j.matlet.2013.09.104

• PbTe NWs
• Nanocrystalline materials
• Ultrasonic attenuation
• Elastic properties
• Thermal properties

Hicks and Dresselhauss proposed that conversion of bulk materials into low dimensional size might significantly enhance thermoelectric performance. PbTe nanowires have been suggested as promising thermoelectric materials. In the present paper, nonlinear second and third order elastic constants (SOECs/TOECs) for PbTe nanowires (NWs) are calculated using a simple interaction potential model. Finally, the temperature dependent ultrasonic attenuation is determined for different diameters of the PbTe NWs. Good correlation between the size and temperature dependent thermophysical properties and the ultrasonic attenuation has been established. The studies are important for the development of NWs for energy and thermoelectric cooling applications.

• 出版日期2014-1-1