Magnetocaloric effect and specific heat of gapped graphene quantum dots in external fields

Abstract

This study examines the effects of temperature, radius, Aharonov-Bohm (AB) flux, and gap energy on the specific heat and magnetocaloric potential of bilayer graphene quantum dots (GQDs). By establishing the continuity of eigen spinors at the GQD interface, we have an equation that reveals the reliance of energy levels on external physical parameters. The specific heat shows a Schottky anomaly, increasing with temperature, peaking, and then decreasing. Stronger magnetic fields shift the peak temperature without changing the peak value. The magnetocaloric potential increases with magnetic field strength, at higher temperatures, where thermal agitation dominates.