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Concepts in Spin Electronics$
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Sadamichi Maekawa

Print publication date: 2006

Print ISBN-13: 9780198568216

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198568216.001.0001

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Probing and manipulating spin effects in quantum dots

Probing and manipulating spin effects in quantum dots

(p.93) 3 Probing and manipulating spin effects in quantum dots
Concepts in Spin Electronics

S. Tarucha

M. Stopa

S. Sasaki

K. Ono

Oxford University Press

Probing and manipulating spin effects in quantum dots are described in this chapter. Electronic configuration in quantum dots is tunable with various parameters such as number of electrons, magnetic field, and inter-dot coupling. This is particularly true for the spin states, and the related spin effects manifest themselves in the electronic properties. Singlet-triplet and doublet-doublet crossings in single dots and exchange-coupled two electron states in double dots are described as the typical examples. Special emphasis is placed on the exchange coupling in the scheme of quantum computing. Then long spin relaxation in quantum dots is referred to state that spin is a robust quantum number in quantum dots. This allow for observation of novel phenomena including Pauli spin blockade and the Kondo effect, which are major topics described here.

Keywords:   exchange coupling, spin relaxation, spin blockade, Pauli effect, spin-orbit coupling, hyperfine interaction, Kondo effect, cotunneling, quantum computing

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