| Autor: |
Amin Naseri, Alex Zazunov, Reinhold Egger |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Physical Review X, Vol 4, Iss 3, p 031033 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2160-3308 |
| DOI: |
10.1103/PhysRevX.4.031033 |
| Popis: |
We study the ground state of N weakly interacting electrons (with N≤10) in a two-dimensional parabolic quantum dot with strong Rashba spin-orbit coupling. Using dimensionless parameters for the Coulomb interaction λ≲1 and the Rashba coupling α≫1, the low-energy physics is characterized by an almost flat single-particle dispersion. From an analytical approach for α→∞ and N=2, and from numerical exact-diagonalization and Hartree-Fock calculations, we find a transition from a conventional unmagnetized ground state (for λλ_{c}), with a large magnetization and a circulating charge current. We show that the critical interaction strength λ_{c}=λ_{c}(α,N) vanishes in the limit α→∞. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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