Thermodynamic signatures for topological phase transitions to Majorana andWeyl superfluids in ultracold Fermi gases

摘要

We discuss the thermodynamic signatures for the topological phase transitions into Majorana and Weylnsuperfluid phases in ultracold Fermi gases in two and three dimensions (2D and 3D) in the presence of Rashbanspin-orbit coupling and a Zeeman field.We analyze the thermodynamic properties exhibiting the distinct nature ofnthe topological phase transitions linked with theMajorana fermions (2D Fermi gas) andWeyl fermions (3D Fermingas) which can be observed experimentally, including pressure, chemical potential, isothermal compressibility,nentropy, and specific heat, as a function of the interaction and the Zeeman field at both zero and finite temperatures.nWe conclude that among the various thermodynamic quantities, the isothermal compressibility and the chemicalnpotential as functions of the artificial Zeeman field have the strongest signatures of the topological transitions innboth two and three dimensions.