Schüller, Christian, Broocks, Kay-Birger, Schröter, Patrick, Heyn, Christian, Heitmann, Detlef, Bichler, Max, Wegscheider, Werner, Chakraborty, Tapash and Apalkov, V. M.
(2003)
Optical Probing of a Fractionally Charged Quasihole in an Incompressible Liquid.
Physical Review Letters (PRL) 91 (11), p. 116403.
Date of publication of this fulltext: 08 Feb 2010 13:31at publisher (via DOI)
Abstract
In photoluminescence spectroscopy of a low-mobility two-dimensional electron gas subjected to a quantizing magnetic field, we observe an anomaly around nu= (1/3) at a very low temperature (0.1 K) and an intermediate electron density (0.9×1011 cm–2). The anomaly is explained as due to perturbation of the incompressible liquid at the Laughlin state due to close proximity of a localized charged ...
Abstract
In photoluminescence spectroscopy of a low-mobility two-dimensional electron gas subjected to a quantizing magnetic field, we observe an anomaly around nu= (1/3) at a very low temperature (0.1 K) and an intermediate electron density (0.9×1011 cm–2). The anomaly is explained as due to perturbation of the incompressible liquid at the Laughlin state due to close proximity of a localized charged exciton which creates a fractionally charged quasihole in the liquid. The anomaly of ~2 meV can be destroyed by applying a small thermal energy of ~0.2 meV that is enough to close the quasihole energy gap.
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