7,224 research outputs found
Orbital ferromagnetism in interacting few-electron dots with strong spin-orbit coupling
We study the ground state of weakly interacting electrons (with ) in a two-dimensional parabolic quantum dot with strong Rashba spin-orbit
coupling. Using dimensionless parameters for the Coulomb interaction,
, and the Rashba coupling, , the low-energy
physics is characterized by an almost flat single-particle dispersion. From an
analytical approach for and , and from numerical exact
diagonalization and Hartree-Fock calculations, we find a transition from a
conventional unmagnetized ground state (for ) to an orbital
ferromagnet (for ), with a large magnetization and a
circulating charge current. We show that the critical interaction strength,
, vanishes in the limit .Comment: 15 pages, 9 figures; (v2) more discussion added, fig.8 correcte
How do red and infrared low-level lasers affect folliculogenesis cycle in rat’s ovary tissue in comparison with clomiphene under in vivo condition
Tabriz University of Medical Sciences, 5/89/137Peer reviewedPublisher PD
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