Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2010-02-09
Phys.Rev.B82:075133,2010
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages, 1 figure
Scientific paper
10.1103/PhysRevB.82.075133
The damping rate of two-dimensional massless Dirac fermions exhibit non-Fermi liquid behavior, $\propto \epsilon^{1/2}$, due to gauge field at zero temperature and zero chemical potential. We study the fate of this behavior at finite chemical potential. We fist calculate explicitly the temporal and spatial components of vacuum polarization functions. The analytical expressions imply that the temporal component of gauge field develops a static screening length at finite chemical potential while the transverse component remains long-ranged owing to gauge invariance. We then calculate the fermion damping rate and show that the temporal gauge field leads to normal Fermi liquid behavior but the transverse gauge field leads to non-Fermi liquid behavior $\propto \epsilon^{2/3}$ at zero temperature. This energy-dependence is more regular than $\propto \epsilon^{1/2}$ and does not change as chemical potential varies.
Liu Guo-Zhu
Wang Jing-Rong
No associations
LandOfFree
Fate of non-Fermi liquid behavior in QED$_{3}$ at finite chemical potential does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fate of non-Fermi liquid behavior in QED$_{3}$ at finite chemical potential, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fate of non-Fermi liquid behavior in QED$_{3}$ at finite chemical potential will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-124161