Spin Pumping and Measurement of Spin Currents in Optical Superlattices.
Phys Rev Lett
; 117(17): 170405, 2016 Oct 21.
Article
de En
| MEDLINE
| ID: mdl-27824444
ABSTRACT
We report on the experimental implementation of a spin pump with ultracold bosonic atoms in an optical superlattice. In the limit of isolated double wells, it represents a 1D dynamical version of the quantum spin Hall effect. Starting from an antiferromagnetically ordered spin chain, we periodically vary the underlying spin-dependent Hamiltonian and observe a spin current without charge transport. We demonstrate a novel detection method to measure spin currents in optical lattices via superexchange oscillations emerging after a projection onto static double wells. Furthermore, we directly verify spin transport through in situ measurements of the spins' center-of-mass displacement.
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Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Phys Rev Lett
Année:
2016
Type de document:
Article
Pays d'affiliation:
Allemagne