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arXiv · 1604.06149

Manifestation of a non-abelian gauge field in a p-type semiconductor system

T. Li·L. A. Yeoh·A. Srinivasan·O. Klochan·D. A. Ritchie·M. Y. Simmons·O. P. Sushkov·A. R Hamilton
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Abstract

Gauge theories, while describing fundamental interactions in nature, also emerge in a wide variety of physical systems. Abelian gauge fields have been predicted and observed in a number of novel quantum many-body systems, topological insulators, ultracold atoms and many others. However, the non-abelian gauge field, while playing the most fundamental role in particle physics, up to now has remained a purely theoretical construction in many-body physics. In the present paper we report the first observation of a non-abelian gauge field in a spin-orbit coupled quantum system. The gauge field manifests itself in quantum magnetic oscillations of a hole doped two-dimensional (2D) GaAs heterostructure. Transport measurements were performed in tilted magnetic fields, where the effect of the emergent non-abelian gauge field was controlled by the components of the magnetic field in the 2D plane.

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T. Li, L. A. Yeoh, A. Srinivasan, O. Klochan, D. A. Ritchie, M. Y. Simmons, O. P. Sushkov, A. R Hamilton. 2016-06-01. Manifestation of a non-abelian gauge field in a p-type semiconductor system. https://arxiv.org/abs/1604.06149

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