Portal de Periódicos da CAPES

Bloch Electrons in a Jahn-Teller Crystal and an Orbital-Density-Wave State due to the Berry Phase

1998; American Physical Society; Volume: 80; Issue: 20 Linguagem: Inglês

10.1103/physrevlett.80.4518

1092-0145

Hiroyasu Koizumi, Takashi Hotta, Yasutami Takada,

Inorganic Chemistry and Materials

The effect of the Berry phase is included explicitly in the wave function describing conduction electrons in a crystal composed of periodically arrayed Jahn-Teller centers that have conically intersecting potential energy surfaces. The Berry phase can make a drastic change in the band structure, leading generally to the formation of an orbital-density-wave state. We discuss implications of our theory and possible relations to the orbital ordering observed in the manganese perovskites.