Alexandria Digital Research Library

Thermoelectric Properties of Complex Oxide Heterostructures

Author:
Cain, Tyler Andrew
Degree Grantor:
University of California, Santa Barbara. Materials
Degree Supervisor:
Susanne Stemmer
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2015
Issued Date:
2015
Topics:
Condensed matter physics, Materials science, and Inorganic chemistry
Keywords:
Complex Oxide
SrTiO3
Molecular Beam Epitaxy
Seebeck Coefficient
Thermoelectric
Genres:
Dissertations, Academic and Online resources
Dissertation:
Ph.D.--University of California, Santa Barbara, 2015
Description:

Thermoelectrics are a promising energy conversion technology for power generation and cooling systems. The thermal and electrical properties of the materials at the heart of thermoelectric devices dictate conversion efficiency and technological viability. Studying the fundamental properties of potentially new thermoelectric materials is of great importance for improving device performance and understanding the electronic structure of materials systems.

In this dissertation, investigations on the thermoelectric properties of a prototypical complex oxide, SrTiO3, are discussed. Hybrid molecular beam epitaxy (MBE) is used to synthesize La-doped SrTiO3 thin films, which exhibit high electron mobilities and large Seebeck coefficients resulting in large thermoelectric power factors at low temperatures. Large interfacial electron densities have been observed in SrTiO3/RTiO 3 (R=Gd,Sm) heterostructures. The thermoelectric properties of such heterostructures are investigated, including the use of a modulation doping approach to control interfacial electron densities. Low-temperature Seebeck coefficients of extreme electron-density SrTiO3 quantum wells are shown to provide insight into their electronic structure.

Physical Description:
1 online resource (119 pages)
Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/48907/f3r20zj2
ISBN:
9781339083919
Catalog System Number:
990045715450203776
Rights:
Inc.icon only.dark In Copyright
Copyright Holder:
Tyler Cain
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