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Waveguides for spin-polarized currents in diluted magnetic semiconductor - nanomagnet hybrids Cheung, Kelly
Abstract
Diluted magnetic semiconductors in their paramagnetic phase exhibit a giant Zeeman response. This effect can be used in conjunction with external inhomogeneous magnetic fields to engineer spin-polarized charge-carrier eigenstates with certain desirable features. In this thesis, we solve Schrodinger’s equation numerically and examine the charge-carrier wavefunctions in DMS waveguides in the presence of a highly inhomogeneous external magnetic field from an infinitely long rectangular nanomagnet. The low-energy eigenstates are found and their dependence on various parameters, such as size of the nanomagnet, thickness of the DMS waveguide, strength of coupling between the charge-carriers and the magnetic spins in the semiconductor, and addition of other external magnetic fields, is characterized. This geometry is shown to be ideal for creating spin-polarized currents under the nanomagnet’s edges.
Item Metadata
Title |
Waveguides for spin-polarized currents in diluted magnetic semiconductor - nanomagnet hybrids
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2006
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Description |
Diluted magnetic semiconductors in their paramagnetic phase exhibit a giant Zeeman response. This effect can be used in conjunction with external inhomogeneous magnetic fields to engineer spin-polarized charge-carrier eigenstates with certain desirable features. In this thesis, we solve Schrodinger’s equation numerically and examine the charge-carrier wavefunctions in DMS waveguides in the presence of a highly inhomogeneous external magnetic field from an infinitely long rectangular nanomagnet. The low-energy eigenstates are found and their dependence on various parameters, such as size of the nanomagnet, thickness of the DMS waveguide, strength of coupling between the charge-carriers and the magnetic spins in the semiconductor, and addition of other external magnetic fields, is characterized. This geometry is shown to be ideal for creating spin-polarized currents under the nanomagnet’s edges.
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Genre | |
Type | |
Language |
eng
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Date Available |
2010-01-08
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0092680
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2006-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.