Topological defects play an important role in the melting phenomena in two-dimensions. In this work, we report experimental observation of topological defect induced melting in two-dimensional electron systems (2DES) in the presence of strong Coulomb interaction and disorder. The phenomenon is characterised by measurement of conductivity which goes to zero in a Berezinskii-Kosterlitz-Thouless like transition. Further evidence is provided via low-frequency conductivity noise measurements.

Topics
Acoustic noise measurement, Heterostructures, Electrostatics, Topological excitations, Semiconductors
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© 2013 AIP Publishing LLC.
2013
AIP Publishing LLC
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