3 citations · 3 across the 3 of their papers we have counts for
4 papers
First-principles calculation of higher-order elastic constants from divided differences
Ruvini Attanayake, Umesh C. Roy, Abhiyan Pandit +1
A method is presented to calculate from first principles the higher-order elastic constants of a solid material. The method relies on finite strain deformations, a density function…
New Methods for Critical Analysis: Revealing the Simultaneous Existence of Universality Classes in Nontrivial Magnetic Systems
Harish Chandr Chauhan, Umesh C. Roy, Shovan Dan +2
In magnetic systems, the microscopic constituents exhibit power law behavior near the paramagnetic transition temperature, . The critical exponents (CEs) associated with the p…
Ab initio study of the density dependence of the Grüneisen parameter at pressures up to 360 GPa
Umesh C. Roy, Subir K. Sarkar
Ab initio calculations based on the Density Functional Theory are used to show that the Debye frequency is a linear function of density to a high accuracy for several elemental sol…
Birch's law at elevated temperatures
Umesh C. Roy, Subir K. Sarkar
Birch's law in high pressure physics postulates a linear relationship between elastic wave speed and density and one of its most well known applications is in investigations into t…