Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.246403
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Funding
- DOE
- ARO
- NSF
- Russian Ministry of Education and Science
- Ministry of Education
- Grant Agency of the Czech Republic
- Intel fellowship
- Chateaubriand Fellowship
- EU
- EU ITN INDEX
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0907349] Funding Source: National Science Foundation
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We report the observation of spin currents in a coherent gas of indirect excitons. The realized long-range spin currents originate from the formation of a coherent gas of bosonic pairs-a new mechanism to suppress the spin relaxation. The spin currents result in the appearance of a variety of polarization patterns, including helical patterns, four-leaf patterns, spiral patterns, bell patterns, and periodic patterns. We demonstrate control of the spin currents by a magnetic field. We also present a theory of coherent exciton spin transport that describes the observed exciton polarization patterns and indicates the trajectories of the spin currents.
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