Skoči na glavni sadržaj

Pismo uredniku

Electronically induced anomaly in LO phonon dispersion of high - Tc superconductors

Slaven Barišić
Ivana Mrkonjić
Ivan Kupčić


Puni tekst: engleski pdf 111 Kb

verzije

str. 169-176

preuzimanja: 37

citiraj


Sažetak

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 two in-plane oxygen atoms. It is argued that this charge transfer can be large and that it is strongly coupled to the LO dimerization of the oxygens. The corresponding negative contribution to the free energy is quartic in the LO phonon amplitude, indicating the instability via the first-order phase transition, with a concomitant domain structure.

Ključne riječi

superconductivity; high-Tc cuprates; La2-xSrxCuO4; YBa2Cu3O6+x; LO phonons; oxygen-oxygen charge susceptibility; first-order phase transitions

Hrčak ID:

301562

URI

https://hrcak.srce.hr/301562

Datum izdavanja:

1.10.2001.

Podaci na drugim jezicima: hrvatski

Posjeta: 182 *