Tunable phase transitions in half-Heusler TbPtBi compound.

We report various phase transitions in half-Heusler TbPtBi compound using density functional theory. Specifically, the inclusion of spin-orbit coupling (SOC) leads to the band inversion resulting in the transition from the metallic to the topological semimetallic phase. However, in the presence of SOC, there is a phase transition from the topological semimetal to the trivial semimetal when the material is subjected to compressive strain-7%.

The case of itinerant magnetism in CaMnAl: self-consistent renormalisation (SCR) theory study.

We have applied the powerful self-consistent renormalization theory of spin fluctuations for the system CaMnAldiscovered in 2015 and was conjectured to be an itinerant magnet. We have calculated the inverse static i.e.

Spin correlations and spin-density wave phase in a finite-temperature quasi-one-dimensional electron gas.

In this paper, we theoretically investigate the effect of temperature on spin correlations in an unpolarized quasi-one-dimensional electron gas (Q1DEG). The correlations are treated dynamically within quantum version of the self-consistent mean-field approach of SingwiNumerical results for the ↑↑ and ↑↓ components of static structure factor and pair-correlation function, and the wave vector dependent static spin and charge susceptibilities are presented over a wide range of temperatureand electron coupling. We find that the recently reported (2020335403) non-monotonic-dependence of the contact pair-correlation function(= 0;) is driven primarily by an interplay between ↑↓ correlations and thermal effects.

Dynamic correlation effects on correlational properties of finite-temperature quasi-one-dimensional electron gas.

We have studied correlational properties of quasi-one-dimensional electron gas at finite temperatureby incorporating the dynamics of electron correlations within the quantum version of the self-consistent mean-field approach of Singwi, Tosi, Land, and Sjölander. Static structure factor, pair-correlation function, static density susceptibility, excess kinetic energy, and free correlation energy are calculated covering a wide range of temperature and electron number density. As at absolute zero temperature, the inclusion of dynamics of correlations results in stronger spatial electron correlations, with a pronounced peak in the static structure factor at wave vector∼ 3.