Home · Stephen Kang in Materials Science

Welcome to Stephen Kang’s research website!

I’ll be posting about topics in materials science, from fundamental background to forefront research. Stay tuned!

Force, Flux, and Irreversible Processes

Introduction to generalzied driving force (affinity) and flux for non-equilibrium thermodynamics. Entropy production and local equilibrium.

T2 Resistivity in Perovskites

Elongated Fermi surfaces in perovskites like SrTiO3 explain the T2 resistivity, previously thought to be from electron-electron interactions/scattering.

Types of Diffusivities

Why is chemical diffusivity similar to defect diffusivity, not self-diffusivity? How's tracer diffusivity related? Here's a guide to diffusion coefficients.

Fick’s Law: Thermodynamic Origin

Using the generalized thermodynamic driving force, we find where the definition of diffusivity comes from.