Mott versus anderson localization in 1t-TaS2

  • P. Fazekas
Random Systems
First Online:
Part of the Lecture Notes in Physics book series (LNP, volume 115)

Abstract

A review of electrical, structural and magnetic properties of pure and doped IT-TaS2 suggests that the transition into the commensurate phase at 200 K is accompanied by the Mott localization of 1/13th of the Ta 5d electrons. States at the edges of the almost touching Hubbard subbands become Anderson-localized and, at helium temperatures, conduction proceeds by variable range hopping. The rest of the d-electrons occupies the bonding-type orbitals of the star-shaped atomic clusters. Many properties of the doped samples can be understood by assuming that these clusters are preferentially centred on less electronegative impurities.

Keywords

Star Centre Anderson Localization Mott Localization Undoped Material Commensurate Phase 
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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • P. Fazekas
    • 1
  1. 1.Central Research Institute for PhysicsBudapest 114Hungary

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