Date of Award

3-1-2014

Document Type

Dissertation

Degree Name

Ph.D.

Organizational Unit

College of Natual Science and Mathematics

First Advisor

Barry L. Zink, Ph.D.

Second Advisor

Corinne Lengsfeld

Third Advisor

Kingshuk Ghosh

Fourth Advisor

Mark Siemens

Fifth Advisor

Maria M. Calbi

Keywords

Heat capacity, Johnson noise, Low temperature, Thermal trasport

Abstract

Calorimetric measurments and thermal transport measurments through a-SixNy suspended membranes have been performed to further the understanding of low temperature thin film thermal transport, and understand the interesting physics present within an amorphous dielectric material. The thermal properties of several calorimeters have been measured to understand the geometric dependence on transport phenomenon. We analyze and compare our results with observations of previous measurements, and with those indicating quantum limited thermal transport. We see strong indications of changes to the physical mechanism transporting heat through these materials as temperature changes from 50 mK to 2 K. We have also developed a relaxation calorimetric measurement for use with Johnson Noise Thermometry.

Publication Statement

Copyright is held by the author. User is responsible for all copyright compliance.

Rights Holder

Dain Bassett

Provenance

Received from ProQuest

File Format

application/pdf

Language

en

File Size

113 p.

Discipline

Physics

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