scholarly journals Unzipping DNA by a periodic force: Hysteresis loops, dynamical order parameter, correlations, and equilibrium curves

2019 ◽  
Vol 150 (22) ◽  
pp. 224903 ◽  
Author(s):  
M. Suman Kalyan ◽  
Rajeev Kapri
Keyword(s):  
Order Parameter ◽  
Hysteresis Loops ◽  
Periodic Force ◽  
Dynamical Order

scholarly journals TYPICAL-MEDIUM THEORY OF MOTT–ANDERSON LOCALIZATION

2010 ◽  
Vol 24 (12n13) ◽  
pp. 1680-1726 ◽  
Author(s):  
V. Dobrosavljević
Keyword(s):  
Order Parameter ◽  
Lattice Site ◽  
Fundamental Problem ◽  
Metal Insulator ◽  
Medium Theory ◽  
Anderson Transition ◽  
Dynamical Order ◽  
Static Order ◽  
Two Fluid ◽  
Insight Into

The Mott and the Anderson routes to localization have long been recognized as the two basic processes that can drive the metal–insulator transition (MIT). Theories separately describing each of these mechanisms were discussed long ago, but an accepted approach that can include both has remained elusive. The lack of any obvious static symmetry distinguishing the metal from the insulator poses another fundamental problem, since an appropriate static order parameter cannot be easily found. More recent work, however, has revisited the original arguments of Anderson and Mott, which stressed that the key diference between the metal end the insulator lies in the dynamics of the electron. This physical picture has suggested that the "typical" (geometrically averaged) escape rate [Formula: see text] from a given lattice site should be regarded as the proper dynamical order parameter for the MIT, one that can naturally describe both the Anderson and the Mott mechanism for localization. This article provides an overview of the recent results obtained from the corresponding Typical-Medium Theory, which provided new insight into the the two-fluid character of the Mott–Anderson transition.

scholarly journals Correlations in Space and Time for a Soft-mode Phase-transforming System

1987 ◽  
Vol 40 (5) ◽  
pp. 619 ◽  
Author(s):  
SL Mair
Keyword(s):  
Correlation Function ◽  
Frequency Spectrum ◽  
Order Parameter ◽  
Central Peak ◽  
Square Lattice ◽  
Order Component ◽  
Low Frequencies ◽  
Potential Wells ◽  
Parameter Correlation ◽  
Dynamical Order

Using molecular dynamics (MD) for a system of.nonlinear (quadruple-quadratic) oscillators on a nearest-neighbour square lattice, the pair-displacement correlations. and the frequency spectrum for the dynamical order-parameter correlation function are obtained as a function of temperature. For temperatures T near Tc' the pair-displacement correlation function (with the long-range order component subtracted out) was found to vary with particle separation r as r- 1/2 exp { - A( T) rj, at least out to the tenth neighbour in the 40x40 particle lattice. This is consistent with predictions for the two-dimensional Ising model for T above, but not below, Tc. The frequency spectrum for the dynamical order-parameter correlation function shows the softening of the damped phonon-like modes as T approaches Tc and the formation of a central peak at Tc' consistent with the presence of soliton-like excitations. For small I T - Tc I an additional broad peak appears at low frequencies. This is interpreted as an additional phonon-like peak, the two quasi-phonon processes being associated with vibration across the potential barrier and vibration in one or other of the two potential wells respectively. Although the squared frequency wi of the soft quasi-phonon is approximately linear with I T - Tc lover a range of temperatures, as T increases the wi curve eventually flattens out.

EFFECT OF ORDER PARAMETER RELAXATION ON JOSEPHSON JUNCTION TRANSIENTS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-550-C6-551
Author(s):  
H. Suhl ◽  
J. Hurell ◽  
A. H. Silver ◽  
Y. Song
Keyword(s):  
Josephson Junction ◽  
Order Parameter

NEUTRON INVESTIGATION OF THE SPIN GLASS ORDER PARAMETER FOR T ≪ Tg

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1019-C8-1020
Author(s):  
H. Alloul ◽  
B. Hennion ◽  
P. Mendels
Keyword(s):  
Spin Glass ◽  
Order Parameter

Birefringence and order parameter in nematic N-p-cyanobenzylidene-p-octyloxyaniline

1974 ◽  
Vol 35 (10) ◽  
pp. 185-187 ◽  
Author(s):  
C.C. Huang ◽  
R.S. Pindak ◽  
J.T. Ho
Keyword(s):  
Order Parameter
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