Power dissipation in spintronic devices out of thermodynamic equilibrium

Quantum limits of power dissipation in spintronic computing are estimated. A computing element composed of a single electron in a quantum dot is considered. Dynamics of its spin due to external magnetic field and interaction with adjacent dots are described via the Bloch equations. Spin relaxation d...

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Bibliographic Details
Published inJournal of superconductivity and novel magnetism Vol. 19; no. 6; pp. 497 - 513
Main Authors NIKONOV, Dmitri E, BOURIANOFF, George I, GARGINI, Paolo A
Format Journal Article
LanguageEnglish
Published New York, NY Springer 01.08.2006
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Physics
Spin polarized transport
Bloch equations
Quantum dots
quantum theory
Magnetic field effects
relaxation processes
Thermal dissipation
Background noise
Switching
Thermodynamic equilibrium
magnetic noise
Spin dynamics
Spin relaxation
Energy dissipation
computation theory: heat dissipation
Exchange interactions
Spintronics
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Summary:Quantum limits of power dissipation in spintronic computing are estimated. A computing element composed of a single electron in a quantum dot is considered. Dynamics of its spin due to external magnetic field and interaction with adjacent dots are described via the Bloch equations. Spin relaxation due to magnetic noise from various sources is described as coupling to a reservoir. Resulting dissipation of energy is calculated and is shown to be much less than the thermal limit, ~kT per bit, if the rate of spin relaxation is much slower than the switching rate. Clues on how to engineer an energy efficient spintronic device are provided.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-006-0148-9