Vortex-lattice melting in magnesium diboride in terms of the elastic theory

TL;DR

This paper uses elastic theory to analyze vortex-lattice melting in magnesium diboride, accurately predicting melting lines for different magnetic field orientations and aligning well with experimental results.

Contribution

It provides a systematic theoretical framework for vortex-lattice melting in magnesium diboride considering anisotropy and experimental parameters.

Findings

Theoretical melting lines match experimental data for both field orientations.

Vortex-lattice melting is well described by elastic theory with anisotropic parameters.

Different Lindemann numbers influence the melting line predictions.

Abstract

In the framework of elastic theory, we study the vortex-lattice melting transitions in magnesium diboride for magnetic fields both parallel and perpendicular to the anisotropy axis. Using the parameters from experiments, the vortex-lattice melting lines in the H-T diagram are located systematically by various groups of Lindemann numbers and the anisotropic parameters. It is observed that the theoretical result for the vortex melting with parallel and perpendicular fields agrees well with the experimental data.