Comment on High-temperature superconductivity in transition metallic hydrides MH11 (M = Mo, W, Nb, and Ta) under high pressure by M. Du, Z. Zhang, H. Song, H. Yu, T. Cui, V. Z. Kresinc and D. Duan, Phys. Chem. Chem. Phys., 2021, 23, 6717

The Monkhorst-Pack scheme is applied in Phys. Chem. Chem. Phys., 2021, 23, 6717 to study superconductivity in transition metallic hydrides, implying that umklapp phonons have been excluded. But in a superconductor scattered electrons should be able to cover the entire Fermi surface so that umklapp phonons must be included. The authors should take care to explain if and how measures were taken to include umklapp phonons for electron-phonon scattering.

Automated summary

The Monkhorst-Pack scheme is used to study superconductivity in transition metallic hydrides in a paper published in Phys. Chem. Chem. Phys., 2021, 23, 6717, excluding umklapp phonons. However, in a superconductor, scattered electrons should cover the entire Fermi surface, indicating the inclusion of umklapp phonons is necessary. The authors should provide an explanation of whether and how measures were taken to include umklapp phonons for electron-phonon scattering.