Regensburg 2013 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Poster II

DY 33.61: Poster

Donnerstag, 14. März 2013, 17:00–19:00, Poster C

Multifractal analysis of electronic states in corner-sharing tetrahedral lattices — Martin Puschmann, •Philipp Cain, and Michael Schreiber — Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz

The corner-sharing tetrahedral lattices appear as a sublattice in different materials, e.g. spinels and pyrochlore. We consider the transport of non-interacting electrons and investigate their electronic states in the vicinity of the localization-delocalization (LD) transitions by analyzing the multifractal properties of the wave functions. The multifractal analysis (MFA) is used to explore the phase diagram, which is then compared to the results obtained by other methods [1]. Furthermore the MFA yields detailed insight into the critical behavior at the LD transition, i.e. the divergence of the correlation length, which is characterized by the value of the universal critical exponent.

[1] F. Fazileh, X. Chen, R. J. Gooding, and K. Tabunshchyk, Phys. Rev. B 73, 035124 (2006)