Naslov
Electron mechanism for the tilting transition in La_2-x Sr_xCuO₄

Autori
Barišić, Slaven ; Batistić, Ivo

Izvornik
Journal de Physique, France (0302-0738) 49 (1988), 2; 153-8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
electron mechanism; high temperature superconductor; tilting transition; deformation; electrons; Umklapp matrix elements;

Sažetak
It is shown that the tilting deformation is coupled to the electrons through the tilting induced variation of the Umklapp matrix elements. The latter are important only for small concentrations of Sr if the electron-electron interaction, (which are assumed to be repulsive), are reasonably small. The leading term in the resulting deformation energy is quadratic in the tilting deformation and leads to the critical decrease of the tilting mode frequency when the temperature is lowered. The resistivity, although enhanced by Umklapps, is continuous through the tilting transition. The model bears some resemblance to that developed previously for 4k/sub F/ deformations in organic superconductors. Some consequences of the model for the high T/sub c/ superconductivity are briefly discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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