Journal
PHYSICAL REVIEW B
Volume 85, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.035116
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Funding
- NSF [DMR-0757145, DMR-0705472, DMR-090647, PHY-0646094]
- DOE at Stanford [AC02-76SF00515]
- SFB FOQUS
- Institute for Quantum Information
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We argue that the ground state of a two-dimensional electron gas with Rashba spin-orbit coupling realizes one of several possible liquid crystalline or Wigner crystalline phases in the low-density limit, even for short-range repulsive electron-electron interactions (which decay with distance with a power larger than two). Depending on specifics of the interactions, preferred ground states include an anisotropic Wigner crystal with an increasingly anisotropic unit cell as the density decreases, a striped or electron smectic phase, and a ferromagnetic phase that strongly breaks the lattice point-group symmetry, i.e., exhibits nematic order. Melting of the anisotropic Wigner crystal or the smectic phase by thermal or quantum fluctuations can likely give rise to a nonmagnetic nematic phase that preserves time-reversal symmetry.
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