Possible zero sound in layered perovskites with ferromagnetic s-d exchange interaction

Abstract

Article highlights Propagation of zero sound in layered transition metal perovskites is predicted in framework of s-d exchange interaction with ferromagnetic sign. It is revealed that strong exchange interaction is created by strong s-p-d hybridization between the transition ion and oxidant. The propagation of zero sound is possible only close to cold spots directions of the normal charge carriers along the Fermi contour.

Keywords

• Zero sound
• s-d Exchange interaction
• Hot spots
• Cold spots
• High-Tc superconductivity
• Transverse sound modes