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Spin-Dependent-Recombination Detected Magnetic Resonance of Antimony Donors in Silicon

Rosenius, Samuel LU (2014) PHYM01 20142
Solid State Physics
Department of Physics
Abstract
Realizing quantum information processing would be a paradigm shift in the way calculations and encryptions are used, and is as such a very attractive topic. On the hardware end, attempts on making architectures separating quantum processors and memories like in classical computers have been made. One type of possible quantum memory are group-V donor nuclear and electron spins in silicon, which exhibit long storage times and is well integrateable into the current silicon technology. Among the group-V donors, antimony has not previously been studied for possible use as a quantum memory in low magnetic fields. The antimony nucleus is theoretically expected to exhibit a strong quadrupole moment, which interactions might broaden or shift... (More)
Realizing quantum information processing would be a paradigm shift in the way calculations and encryptions are used, and is as such a very attractive topic. On the hardware end, attempts on making architectures separating quantum processors and memories like in classical computers have been made. One type of possible quantum memory are group-V donor nuclear and electron spins in silicon, which exhibit long storage times and is well integrateable into the current silicon technology. Among the group-V donors, antimony has not previously been studied for possible use as a quantum memory in low magnetic fields. The antimony nucleus is theoretically expected to exhibit a strong quadrupole moment, which interactions might broaden or shift magnetic resonance lines away from theory.

This work shows a successful magnetic resonance spectroscopy of the two stable antimony isotopes in silicon at low magnetic fields through the spin-dependent recombination process. Shifts in resonance frequency for low fields are in particular studied, namely hyperfine interaction shifts, g-factor shifts, and electrical quadrupole shifts. Conventional EPR electron Sx-transitions, electron-nucleus flip-flop Sz-transitions and NMR nuclear Ix transitions are successfully observed down to the lower limit of the experimental setup of 6 mT. A shift characteristic of quadrupole interactions is observed in both isotopes for the $S_z$ and $I_x$-transitions at the order of 10 MHz. (Less)
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author
Rosenius, Samuel LU
supervisor
organization
course
PHYM01 20142
year
type
H2 - Master's Degree (Two Years)
subject
keywords
quantum information, magnetic resonance, nuclear physics, semiconductors, donors
language
English
additional info
This work was done as part of the double-degree exchange program at Keio University, Tokyo, Japan.
id
4905125
date added to LUP
2015-02-10 21:02:54
date last changed
2015-02-10 21:02:54
@misc{4905125,
  abstract     = {Realizing quantum information processing would be a paradigm shift in the way calculations and encryptions are used, and is as such a very attractive topic. On the hardware end, attempts on making architectures separating quantum processors and memories like in classical computers have been made. One type of possible quantum memory are group-V donor nuclear and electron spins in silicon, which exhibit long storage times and is well integrateable into the current silicon technology. Among the group-V donors, antimony has not previously been studied for possible use as a quantum memory in low magnetic fields. The antimony nucleus is theoretically expected to exhibit a strong quadrupole moment, which interactions might broaden or shift magnetic resonance lines away from theory. 

	This work shows a successful magnetic resonance spectroscopy of the two stable antimony isotopes in silicon at low magnetic fields through the spin-dependent recombination process. Shifts in resonance frequency for low fields are in particular studied, namely hyperfine interaction shifts, g-factor shifts, and electrical quadrupole shifts. Conventional EPR electron Sx-transitions, electron-nucleus flip-flop Sz-transitions and NMR nuclear Ix transitions are successfully observed down to the lower limit of the experimental setup of 6 mT. A shift characteristic of quadrupole interactions is observed in both isotopes for the $S_z$ and $I_x$-transitions at the order of 10 MHz.},
  author       = {Rosenius, Samuel},
  keyword      = {quantum information,magnetic resonance,nuclear physics,semiconductors,donors},
  language     = {eng},
  note         = {Student Paper},
  title        = {Spin-Dependent-Recombination Detected Magnetic Resonance of Antimony Donors in Silicon},
  year         = {2014},
}