Tunable Exchange Interaction in Quantum Dot Devices
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概要
- 論文の詳細を見る
We theoretically discuss the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between semiconductor quantum dots (QDs). When each QD having a local spin is coupled to the conduction electrons in semiconductors, an indirect exchange interaction, i.e., the RKKY interaction, is induced between two local spins. The RKKY interaction between QDs, which is mediated by the Fermi sea in semiconductors, is modulated by changing the Fermi energy, and the magnitude or even the sign of the exchange interaction can be tuned, which leads to a tunable magnetic transition in QD devices. We estimate the magnitude of the RKKY interaction in QDs as a function of the electron density and the inter-dot distance.
- Japan Society of Applied Physicsの論文
- 2004-05-15
著者
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Takayanagi Hideaki
Ntt Basic Research Laboratories
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Tamura Hiroyuki
Ntt Basic Research Laboratories
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Shiraishi Kenji
Institute Of Physics University Of Tsukuba
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Shiraishi Kenji
Institute of Physics, University of Tsukuba, Tennodai, Tsukuba 305-8571, Japan
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