Experimental detection and control of trions and Fermi edge singularity in single barrier GaAs/AlAs/GaAs heterostructure using photocapacitance spectroscopy

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Bhunia, Amit.; Singh, Mohit Kumar.; Galvão Gobato, Y..; Henini, Mohamed.; Datta, Shouvik.;
  • Publisher: American Physical Society
  • Subject:
    arxiv: Condensed Matter::Quantum Gases | Condensed Matter::Materials Science | Condensed Matter::Mesoscopic Systems and Quantum Hall Effect | Condensed Matter::Other

We show how photocapacitance spectra can probe and manipulate two dimensional excitonic complexes and Fermi-edge singularities as a function of applied bias even at a temperature of 100 K. For lower density regimes ([less than] 1×1011cm−2) the appearance of two distinct... View more
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