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arXiv · 1306.4196

Evidence for A Two-dimensional Quantum Wigner Solid in Zero Magnetic Field

Jian Huang·L. N. Pfeiffer·K. W. West
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Abstract

We report the first experimental observation of a characteristic nonlinear threshold behavior from dc dynamical response as an evidence for a Wigner crystallization in high-purity GaAs 2D hole systems in zero magnetic field. The system under increasing current drive exhibits voltage oscillations with negative differential resistance. They confirm the coexistence of a moving crystal along with striped edge states as observed for electrons on helium surfaces. However, the threshold is well below the typical classical levels due to a different pinning and depinning mechanism that is possibly related to a quantum process.

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Jian Huang, L. N. Pfeiffer, K. W. West. 2013-10-02. Evidence for A Two-dimensional Quantum Wigner Solid in Zero Magnetic Field. https://doi.org/10.1063/1.4870193

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