Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy
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Author(s)
Ashoori, Raymond
Dial, Oliver E.
Pfeiffer, L. N.
West, K. W.
Date Issued
February 2012
Journal
Physical Review B
Publisher
American Physical Society
Citation
Dial, O. et al. “Observations of Plasmarons in a Two-dimensional System: Tunneling Measurements Using Time-domain Capacitance Spectroscopy.” Physical Review B 85.8 (2012). ©2012 American Physical Society
Version
Final published version
Abstract
Calculations of the single-particle density of states (SPDOS) of electron liquids have long predicted that there exist two distinct charged excitations: the usual quasiparticle consisting of an electron or hole, and a plasmaron consisting of a hole resonantly bound to real plasmons in the Fermi sea. Using tunneling spectroscopy to measure the SPDOS of a 2D electronic system, we demonstrate the detection of a plasmaron in a 2D system in which electrons have mass. With the application of a magnetic field we discover unpredicted magnetoplasmarons which resemble Landau levels with a negative index.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.85.081306
