Strong Rashba Spin--Orbit Interaction Intensity in Low-Potential-Barrier Quantum Dots
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概要
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We study the spin splitting energies of different orbital states of quantum dots with a low-potential barrier. The experimental results show that the splitting energies are orbital state dependent. The theoretical analysis is done with a generalization of the Fock--Darwin states in the presence of spin--orbit interactions. The theoretical predictions match well with the experimental observations and exhibits that the Rashba interaction strength in vertical In<inf>0.05</inf>Ga<inf>0.95</inf>As/GaAs quantum dots is in the range 80\leq \lambda_{\text{R}}\leq 120 meV Å. This enhanced Rashba spin--orbit interaction intensity can be understood from the high penetration of the electron wavefunction into the quantum well with a low-potential barrier.
- 2013-04-25
著者
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Kono Kimitoshi
Low Temperature Physical Laboratory Riken
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Ono Keiji
Low Temperature Physics Laboratory Riken
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Badrutdinov Alexander
Quantum Dynamics Unit, Okinawa Institute of Science and Technology, Onna, Okinawa 904-0495, Japan
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Huang Shiu-Ming
Department of Physics, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, Republic of China
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