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- W1977029338 abstract "Ground-state properties of one-dimensional quantum rings with a few electrons, which interact with each other in the form of $1∕r$ Coulomb repulsion, are studied by exact diagonalization. For three electrons, the fully spin-polarized ground state is uniquely realized when the diameter of the ring is sufficiently large. In contrast, for four and five electrons, the fully polarized state never becomes the unique ground state, however large the diameter is. These results can be understood in terms of the multiple-spin exchange. When a perpendicular magnetic field is applied to the ring (i.e., the Aharonov-Bohm flux is introduced), the persistent current occurs, and the spin chirality is finite for a certain value of the flux. The difference between the quantum ring and the circularly arranged quantum dots is also discussed." @default.
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- W1977029338 date "2007-01-29" @default.
- W1977029338 modified "2023-09-26" @default.
- W1977029338 title "Ground-state properties of quantum rings with a few electrons: Magnetization, persistent current, and spin chirality" @default.
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- W1977029338 doi "https://doi.org/10.1103/physrevb.75.045343" @default.
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