4,587 research outputs found
Holographic model of hybrid and coexisting s-wave and p-wave Josephson junction
In this paper the holographic model for hybrid and coexisting s-wave and
p-wave Josephson junction is constructed by a triplet charged scalar field
coupled with a non-Abelian gauge fields in (3+1)-dimensional AdS
spacetime. Depending on the value of chemical potential , one can show
that there are four types of junctions (s+p-N-s+p, s+p-N-s, s+p-N-p and s-N-p).
We show that DC current of all the hybrid and coexisting s-wave and p-wave
junctions is proportional to the sine of the phase difference across the
junction. In addition, the maximum current and the total condensation decays
with the width of junction exponentially, respectively. For s+p-N-s and s-N-p
junction, the maximum current decreases with growing temperature. Moreover, we
find that the maximum current increases with growing temperature for s+p-N-s+p
and s+p-N-p junction, which is in the different manner as the behaviour of
s+p-N-s and s-N-p junction.Comment: 20 pages, 12 figures, v2: typos corrected, references added,
published versio
Dynamics of Order Parameter in Photoexcited Peierls Chain
The photoexcited dynamics of order parameter in Peierls chain is investigated
by using a microscopic quantum theory in the limit where the hot electrons may
establish themselves into a quasi-equilibrium state described by an effective
temperature. The optical phonon mode responsible for the Peierls instability is
coupled to the electron subsystem, and its dynamic equation is derived in terms
of the density matrix technique. Recovery dynamics of the order parameter is
obtained, which reveals a number of interesting features including the change
of oscillation frequency and amplitude at phase transition temperature and the
photo-induced switching of order parameter.Comment: 5 pages, 3 figure
Intertwined order and holography: the case of the parity breaking pair density wave
We present a minimal bottom-up extension of the Chern-Simons bulk action for
holographic translational symmetry breaking that naturally gives rise to pair
density waves. We construct stationary inhomogeneous black hole solutions in
which both the U(1) symmetry and spatially translational symmetry are
spontaneously broken at finite temperature and charge density. This novel
solution provides a dual description of a superconducting phase intertwined
with charge, current and parity orders.Comment: v3: Revised version in which the rules of effective field theory are
highlighted, to appear in Phys.Rev.Let
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