Electronically Induced Anomaly in LO Phonon Dispersion of High - Tc Superconductors
Slaven Barisic, Ivana Mrkonjic, Ivan Kupcic
Abstract
The strong, electronically induced anomaly in the spectrum of the longitudinal optical (LO) phonons propagating along the main axes of the CuO2 plane is tentatively attributed to the oxygen-oxygen charge transfer between the two oxygens in the plane. It is argued that this charge transfer can be large and that it is strongly coupled to the zone boundary LO phonons. The corresponding negative contribution to the free energy is quartic in the LO phonon amplitude, making the LO phonon unstable through the first order phase transition, with a concomitant domain structure.
Create a lesson
Related papers
Spacetime Dynamics of Altermagnetic Magnons
Ali Emami Kopaei, Karthik Subramaniam Eswaran, Krzysztof Wohlfeld
Engineering Weak Universality with Quantum Dots
Warre Missiaen, Michael Wimmer, Natalia Chepiga
Lyapunov-controlled thermalization: an exact real-time example
Jonas Loy, Jan C. Louw
Multiconfigurational Analysis of Local Electronic Structure of RuO2 Using Relativistic Embedded Clusters
Zhosan I. A., Lomachuk Yu. V., Maltsev D. A. et al.
Unconstrained compact lattice QED2+1 coupled to phonons: Gauss sectors, orthogonal semimetal, and deconfined criticality
João C. Inácio, Fakher F. Assaad
Collective Charge-\(2e\) Bosonic Excitations in Charge-Ordered Systems
Ping Tang