Thermoelectric Properties of Complex Oxide Heterostructures
- 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:
- Materials science, Condensed matter physics, and Inorganic chemistry
- Keywords:
- Complex Oxide,
Seebeck Coefficient,
Thermoelectric,
Molecular Beam Epitaxy, and
SrTiO3 - Genres:
- Online resources and Dissertations, Academic
- 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
- Other Versions:
- http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:3724755
- ARK:
- ark:/48907/f3r20zj2
- ISBN:
- 9781339083919
- Catalog System Number:
- 990045715450203776
- Copyright:
- Tyler Cain, 2015
- Rights:
- In Copyright
- Copyright Holder:
- Tyler Cain
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