Broken gauge symmetries are typically restored at high temperature, and the leadingorder result for the critical temperature Tc was found many years ago by Weinberg and by Dolan and Jackiw. I find a simple expression for the next-to-leading order correction to Tc, which is order eTc where e is the gauge coupling. The result is a simple consequence of recent work on summing ring diagrams at high...

in this study, a manganite sample with a nominal formula of la0.9sr0.1mno3 was prepared by the microwave assisted sol-gel method and annealing at various temperatures. the structural and magnetic properties of the samples were investigated by xrd, fesem and ac susceptometer, respectively. xrd analysis showed that the samples are a nearly single phase. fesem micrographs showed that by increasing...

We report molecular dynamics simulations of a hydrophobic polymer-chain in aqueous solution between 260 K and 420 K at pressures of 1 bar, 3000 bar, and 4500 bar. The simulations reveal a hydrophobically collapsed structure at low pressures and high temperatures. At 3000 bar and about 260 K and at 4500 bar and about 260 K, however, an abrupt transition to a swelled state is observed. The transi...

Adsorption isotherms of alkanes ranging from methane through pentane in the microporous aluminophosphate AlPO4-5 are calculated using grand canonical monte carlo simulations. These simulations predict a surprisingly complex behavior. For methane and ethane we find at low temperatures a low-density-high-density transition that resembles capillary condensation. At intermediate temperatures a high...

The thermodynamic transition temperature is a key parameter to ascertain when assessing the properties of a crystalline hydrate. The transition temperature is sometimes difficult to determine experimentally due to rapid transformation between the two crystal forms in solution. In this study, a new approach for determining the transition temperature is presented, utilizing the temperature depend...

A dimer of bound atoms cannot melt, only dissociate. Bulk metals show a well defined first order transition between their solid and liquid phases. The appearance of the melting transition is explored for increasing clusters sizes via the signatures in the specific heat and the root mean square of the bond lengths δB (Berry parameter) by means of Monte-Carlo simulations of Al clusters modelled b...

The phase-transition temperatures of an elastin-like polypeptide (ELP) with the (GVGVP)40 sequence and solvent dipolarity/polarizability, hydrogen-bond donor acidity, and hydrogen-bond acceptor basicity in its aqueous solutions were quantified in the absence and presence of different salts (Na2SO4, NaCl, NaClO4, and NaSCN) and various osmolytes (sucrose, sorbitol, trehalose, and trimethylamine ...

The martensitic–austenitic phase transformation of a polycrystalline shape memory alloys (SMA) occurs gradually over a range of temperatures even though the monocrystal undergoes a first-order transition (at a single temperature). Factors such as material inhomogeneities and internal stresses in a polycrystal are believed to cause the spread in transformation temperatures. In this work, we assu...

We elucidate the physics of protein dynamical transition via 10-100-ns molecular dynamics simulations at temperatures spanning 160-300 K. By tracking the energy fluctuations, we show that the protein dynamical transition is marked by a crossover from nonstationary to stationary processes that underlie the dynamics of protein motions. A two-timescale function captures the nonexponential characte...

The transition of the physical phase of lipids in membrane fragments of a blue-green alga Anacystis nidulans was studied by a spin labeling technique. The maximum hyperfine splitting of the electron spin resonance spectrum of the N-oxyl-4', 4'-dimethyloxazolidine derivative of 5-ketostearic acid plotted against the reciprocal of the absolute temperature gave a discontinuity point that was chara...