18 research outputs found
Nonperturbative Renormalization and the QCD Vacuum
We present a self consistent approach to Coulomb gauge Hamiltonian QCD which
allows one to relate single gluon spectral properties to the long range
behavior of the confining interaction. Nonperturbative renormalization is
discussed. The numerical results are in good agreement with phenomenological
and lattice forms of the static potential.Comment: 23 pages in RevTex, 4 postscript figure
Imperfect nesting and transport properties in unconventional density waves
We consider the effect of imperfect nesting in quasi-one dimensional
unconventional density waves.
The phase diagram is very close to those in a conventional DW. The linear and
non-linear aspects of the electric conductivity are discussed. At T=0 the
frequency dependent electric conductivity develops a small dip at low
frequencies.
The threshold electric field depends strongly on the imperfect nesting
parameter, allowing us to describe the measured threshold electric field in the
low temperature phase of the quasi-two dimensional organic conductor,
alpha-(BEDT-TTF)_2KHg(SCN)_4 very well.Comment: 9 pages, 9 figure
Competition between Pauli and orbital effects in a charge-density wave system
We present angular dependent magneto-transport and magnetization measurements
on alpha-(ET)2MHg(SCN)4 compounds at high magnetic fields and low temperatures.
We find that the low temperature ground state undergoes two subsequent
field-induced density-wave type phase transitions above a critical angle of the
magnetic field with respect to the crystallographic axes. This new phase
diagram may be qualitatively described assuming a charge density wave ground
state which undergoes field-induced transitions due to the interplay of Pauli
and orbital effects.Comment: 11 pages, 4 figures, shown at the APS march meeting 2000, appears in
the Ph.D. thesis of J. S. Qualls (Florida State University, 1999), and
submitted to PR