Pretransition state and structural transition in a deformed crystal

Physics of the Solid State - It is shown theoretically that a deformed crystal exhibiting structural instability can be treated as a quantum system of pseudospins. The quantum behavior of atoms...     

Low-Temperature Physical Mechanism of Inelastic Strain of Metallic Glass

Russian Physics Journal - The paper deals with the low-temperature physical mechanism of inelastic strain of metallic glass, which is the quantum atomic tunneling in a double well potential or...     

Kinetics of the Structural Transition to a Highly Excited State

It is demonstrated that in a crystal that undergoes a martensitic transition stimulated by an external force pacemakers arising in inhomogeneous regions of the medium are sources of forming an incommensurable lattice structure.     

A Quantum System of Pseudospins and a Structural Transformation in a Strained Crystal

It is shown that an unstable crystal structure in a stress field can be treated as a quantum system of pseudospins. A stimulating strain field gives rise to quantum tunneling of atoms. The latter effect is a physical cause for a coherent behavior of the crystal in a stress-concentrator zone wherein the material undergoes the nonequilibrium structural transformation a highly-excited state under load.     

Elastic-strain field soliton in a structurally unstable crystal

It is shown that a spatially localized collective excitation of the crystal lattice (soliton) can form and propagate in a structurally unstable crystal. This soliton is a structural defect consisting of two interphase boundaries separated by another phase and can be considered a pulse of the elastic-strain field with a characteristic length l ≈ 10^?8?10^?4 cm and a duration τ_p ≈ 10^?13? 10^?9s.     

Kinetic Model of Nanostructuring of an Amorphous Metal Film Induced by a Millisecond Thermal Pulse

Technical Physics - A model that describes amorphous–nanocrystalline transformation induced by either thermal annealing or millisecond thermal pulse is proposed. Generation of nanocrystals in...     

Physical model and the associative memory of a cytoskeleton microtubule as a system of dipoles

A physical model of the conformational degrees of freedom of a cytoskeleton microtubule represented as a system of interacting dipoles is elaborated, characteristic physical quantities are estimated, and a phase diagram of the ferroelectric state of the microtubule at T = 0 is constructed. The presence of frustrated couplings J _ij between the dipoles appears to be the most important feature of the disordered dipole system of the microtubule, owing to which the ground state of the dipole system splits into a large number of lower energy states. The dynamics of the dipole system is determined by the relaxation of the dipole-dipole interaction energy. After the dipole system has evolved to its final state, the input image is associated with one of reference images stored earlier; hence, the dipole system of a microtubule can be viewed as a distributed system with associative memory.     

Microscopic model and phase diagram of the dipole system of a cytoskeleton microtubule at finite temperatures

A microscopic model of the dipole system of a cytoskeleton microtubule at finite temperatures is developed. The phase diagram of the ground state of the dipole system of the cytoskeleton microtubule is constructed and the temperature dependence of the mean square of polarization in the dipole system of the cytoskeleton microtubule is calculated.     

A Kinetic Model of Nonequilibrium Melting of Metal under Critical Heating by a Nanosecond Volumetric Heat Source

Russian Physics Journal - A kinetic model of nonequilibrium melting of a metal under conditions of critical heating by a nanosecond volumetric heat source is formulated. The proposed approach takes...