Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy

O. E. Dial, R. C. Ashoori, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

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.

Original languageEnglish (US)
Article number081306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number8
DOIs
StatePublished - Feb 28 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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