Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Shenoy, S. R."'
To test a Partial Equilibration Scenario (PES) of Ritort and colleagues, we do Monte Carlo simulations of discretized-strain spin models, for four 3D martensitic structural transitions under quenches to a bath temperature $T
Externí odkaz:
http://arxiv.org/abs/2210.01997
We do Monte Carlo simulations of four 3D structural transitions, with vector-spin models of their martensitic strain domains under quenches to $T$, to test a generic post-quench Partial Equilibration Scenario (PES) of Ritort. We indeed confirm that e
Externí odkaz:
http://arxiv.org/abs/2111.04290
Publikováno v:
PhysRevB.91.214108 (2015)
Entropy barriers and ageing states appear in martensitic structural-transition models, slowly re-equilibrating after temperature quenches, under Monte Carlo dynamics. Concepts from protein folding and ageing harmonic oscillators turn out to be useful
Externí odkaz:
http://arxiv.org/abs/1506.02846
We consider ferroelastic first-order phase transitions with $N_{OP}$ order-parameter strains entering Landau free energies as invariant polynomials, that have $N_V$ structural-variant Landau minima. The total free energy includes (seemingly innocuous
Externí odkaz:
http://arxiv.org/abs/1010.5538
Finescale probes of many complex electronic materials have revealed a non-uniform nanoworld of sign-varying textures in strain, charge and magnetization, forming meandering ribbons, stripe segments or droplets. We introduce and simulate a Ginzburg-La
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304198
We derive underdamped evolution equations for the order-parameter (OP) strains of a ferroelastic material undergoing a structural transition, using Lagrangian variations with Rayleigh dissipation, and a free energy as a polynomial expansion in the $N
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211425
Publikováno v:
Physical Review A, 66, 033604 (2002)
An independent pair ansatz is developed for the many body wavefunction of dilute Bose systems. The pair correlation is optimized by minimizing the expectation value of the full hamiltonian (rather than the truncated Bogoliubov one) providing a rigoro
Externí odkaz:
http://arxiv.org/abs/cond-mat/0205282
Oscillations in quantum phase about a mean value of $\pi$, observed across micropores connecting two \helium baths, are explained in a Ginzburg-Landau phenomenology. The dynamics arises from the Josephson phase relation,the interbath continuity equat
Externí odkaz:
http://arxiv.org/abs/cond-mat/0011298
Publikováno v:
Phys. Rev. B57, 10314 (1998).
The effects of random dilution of junctions on a two-dimensional Josephson-junction array in a magnetic field are considered. For rational values of the average flux quantum per plaquette $f$, the superconducting transition temperature vanishes, for
Externí odkaz:
http://arxiv.org/abs/cond-mat/9802032
We consider a Bose-Einstein condensate (BEC) of $N$ atoms of repulsive interaction $\sim U_0$, in an elliptical trap, axially pierced by a Gaussian-intensity laser beam, forming an effective (quasi-2D) toroidal trap with minimum at radial distance $\
Externí odkaz:
http://arxiv.org/abs/cond-mat/9711295