We probe for statistical and Coulomb-induced spin textures among the low-lying states of repulsively interacting particles confined to potentials that are both rotationally and time-reversal invariant. In particular, we focus on two-dimensional quantum dots and employ configuration-interaction techniques to directly compute the correlated many-body eigenstates of the system. We produce spatial maps of the single-particle charge and spin density and verify the annular structure of the charge density and the rotational invariance of the spin field. We further compute two-point spin correlations to determine the correlated structure of a single component of the spin vector field. In addition, we compute three-point spin-correlation functions to uncover chiral structures. We present evidence for both chiral and quasitopological spin textures within energetically degenerate subspaces in the three-and four-particle systems.
机构:
Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA
Columbia Univ, Dept Phys, New York, NY 10027 USAConsiglio Nazl Ric CNR NANO NEST Pisa, Ist Nanosci, I-56127 Pisa, Italy
Pinczuk, A.
Pfeiffer, L. N.
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机构:
Alcatel Lucent, Bell Labs, Murray Hill, NJ 07974 USA
Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USAConsiglio Nazl Ric CNR NANO NEST Pisa, Ist Nanosci, I-56127 Pisa, Italy
Pfeiffer, L. N.
West, K. W.
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机构:
Alcatel Lucent, Bell Labs, Murray Hill, NJ 07974 USA
Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USAConsiglio Nazl Ric CNR NANO NEST Pisa, Ist Nanosci, I-56127 Pisa, Italy