Dirac Composite Fermions at the HalfFilled Landau Level (invited).
Abstract
Abstract not provided.
 Authors:
 Publication Date:
 Research Org.:
 Sandia National Lab. (SNLNM), Albuquerque, NM (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC22)
 OSTI Identifier:
 1372754
 Report Number(s):
 SAND20166913C
645884
 DOE Contract Number:
 AC0494AL85000
 Resource Type:
 Conference
 Resource Relation:
 Conference: Proposed for presentation at the 33rd International Conference on the Physics of Semiconductors held July 31  August 5, 2016 in Beijing, China.
 Country of Publication:
 United States
 Language:
 English
Citation Formats
Pan, Wei. Dirac Composite Fermions at the HalfFilled Landau Level (invited).. United States: N. p., 2016.
Web.
Pan, Wei. Dirac Composite Fermions at the HalfFilled Landau Level (invited).. United States.
Pan, Wei. 2016.
"Dirac Composite Fermions at the HalfFilled Landau Level (invited).". United States.
doi:. https://www.osti.gov/servlets/purl/1372754.
@article{osti_1372754,
title = {Dirac Composite Fermions at the HalfFilled Landau Level (invited).},
author = {Pan, Wei},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}
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Quasiparticle Behavior of Composite Fermions in the HalfFilled Landau Level
We calculate the effect of infrared fluctuations of the ChernSimons gauge field on the singleparticle Green{close_quote}s function of composite fermions in the halffilled Landau level via higherdimensional bosonization on a curved Fermi surface. We find that composite fermions remain welldefined quasiparticles, with an effective mass given by the meanfield value, but with anomalously large damping and a spectral function that contains considerable weight away from the quasiparticle peak. {copyright} {ital 1997} {ital The American Physical Society} 
Singular Pair Breaking in the Composite Fermi Liquid Description of the HalfFilled Landau Level
Fluctuations of the ChernSimons gauge field in the composite Fermi liquid description of the halffilled Landau level are pair breaking in all angular momentum channels. For shortrange electronelectron interactions these fluctuations are sufficiently strong to drive any T=0 pairing transition first order. For Coulomb interactions these fluctuations are weaker and a continuous transition is possible. {copyright} {ital 1999} {ital The American Physical Society } 
Influence of gaugefield fluctuations on composite fermions near the halffilled state
Taking into account the transverse gaugefield fluctuations, which interact with composite fermions, we examine the finitetemperature compressibility of the fermions as a function of an effective magnetic field {Delta}{ital B}={ital B}{minus}2{ital n}{sub {ital e}}{ital hc}/{ital e} ({ital n}{sub {ital e}} is the density of electrons) near the halffilled state. It is shown that, after including the lowestorder gaugefield correction, the compressibility becomes {partial_derivative}{ital n}/{partial_derivative}{mu}{proportional_to}{ital e}{sup {minus}{Delta}{omega}}{sub {ital c}}/2{ital T}[1 +[{ital A}({eta})/({eta}{minus}1)]({Delta}{omega}{sub {ital c}}){sup 2/(1+{eta})}/{ital T}] for {ital T}{much_lt}{Delta}{omega}{sub {ital c}}, where {Delta}{omega}{sub {ital c}}={ital e}{Delta}{ital B}/{ital mc}. Here we assume that the interaction between the fermions is given by {italmore »