Abstract

Sanjay Kumar Bhagat

The electronic properties of quasi-crystals have been presented. The quasicrystals being based on quasiperiodic order other than crystal like periodic translational order and embodying self similarity, present unique condensed matter phases. In addition to their curious structural characteristics the paucity of translational periodicity leads to drastic deviations in their electronic behaviour as compared to crystalline counterparts. This paper describes and discusses some new developments in regard to structural and electronic aspects of quasi-crystalline materials. The fundamental property relating to electronic conductivity and its temperature variation has been attempted to become explicable based on (a) taking qc as disordered materials, (b) assuming qc as hierarchy of clusters and (c) bringing in new concept governing the wave functions of electrons (critical wave functions) and some other models.

Quasicrystals; electronic properties; transport properties

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