Superconductivity in bcc high-entropy alloys: a comparative review of experimental data and DFT predictions

High-entropy alloys (HEAs) with body-centred cubic (bcc) structures possess one of the highest critical parameters among HEA superconductors, making them one of the most promising candidates for practical applications in their field. This review systematically compares experimental data and theoretical predictions from density functional theory (DFT) for superconducting bcc HEAs, focusing on critical parameters such as the superconducting critical temperature, the Debye temperature, and the electron-phonon coupling constant. Although DFT provides valuable information on electronic structures, lattice dynamics, and thermodynamic stability, significant discrepancies persist between the computed and measured parameters. Possible reasons for this are discussed.