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VOLUME 58 (1993) | ISSUE 10 | PAGE 822
Distinctive features of the weak localization of 2D holes on the tellurium (1010) surface: role of energy-spectrum anisotropy
The conductivity of a system of 2D holes in an accumulating quantum-well layer on the (1010) surface of a tellurium crystal has been studied at temperatures of 1.3-4.2 K. In weak magnetic fields there is an anomalous positive magnetoresistance. The latter is interpreted in a modified theory of a weak localization of particles which do not interact with each other. The modification consists of incorporating an anisotropy of the tellurium band spectrum. Phase relaxation of the wave function of the particles in the course of intervalley transitions plays a special role in the weak localization of 2D holes on the tellurium surface.