New observations on the low-temperature phase transitions in KLiSO4

Phase transitions and change of type in low-temperature heat

Classical heat pulse experiments have shown heat to propagate in waves through crystalline materials at temperatures close to absolute zero. With increasing temperature, these waves slow down and finally disappear, to be replaced by diffusive heat propagation. Several features surrounding this phenomenon are examined in this work. The model used switches between an internal parameter (or extend...

NUMERICAL SIMULATIONS OF THE PHASE TRANSITIONS IN CLUSTERS

We have studied the phase transitions in atomic clusters by molecular dynamics simulation, assuming Lennard-Jones interatomic pair potential. Calculations are performed by DAP parallel computer. The results are analyzed by simulating their orientational distribution plots (dot-plot), and neutron diffraction patterns. It is shown that all the main features of the bulk phase transitions are e...

Edge effects on low temperature surface adsorption phases and phase transitions on finite-width square terraces

A transfer matrix approach is used to conduct a thorough investigation of all possible adsorbate configurations or phases on terraces of various widths M including edge effects, and limited to firstand second-neighbor adsorbate–adsorbate interactions. Figures showing the configurations that occur within this model are presented for M 1⁄4 3 and 4, and detailed tables provide the phase sequences ...

Low-Temperature Phase Transitions in a Soluble Oligoacene and Their Effect on Device Performance and Stability

The absence of finite-temperature phase transitions in low-dimensional many-body models: a survey and new results

After a brief discussion of the Bogoliubov inequality and possible generalizations thereof, we present a complete review of results concerning the Mermin-Wagner theorem for various many-body systems, geometries and order parameters. We extend the method to cover magnetic phase transitions in the Periodic Anderson Model as well as certain superconducting pairing mechanisms for Hubbard films. The...