Volume 111, Number 3, August 2015
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||28 August 2015|
Quasiperiodicity and 2D topology in 1D charge-ordered materials
1 H. H. Wills Physics Laboratory, University of Bristol - Tyndall Avenue, Bristol, BS8 1TL, UK
2 Institute for Theoretical Physics, University of Amsterdam - 1090 GL Amsterdam, The Netherlands
Received: 18 January 2015
Accepted: 30 July 2015
The mathematical description of 1D quasicrystals has recently been linked to that of 2D quantum Hall states. The topological classification of 1D quasicrystals and the corresponding interpretation of their observed charge transport have been widely discussed. We demonstrate the equivalence of both 1D quasicrystals and 2D quantum Hall states to a mean-field treatment of charge order. Using the fractal nature of the spectrum of charge-ordered states we consider incommensurate order as a limit of commensurate. The topological properties of both are identical, arising from a 2D parameter space of phase and wave vector, and fit into class A of the Tenfold Way. The topological nature of all the systems can be tested by measuring a quantized particle transport upon dragging the charge order.
PACS: 71.45.Lr – Charge-density-wave systems / 61.44.Br – Quasicrystals / 73.43.-f – Quantum Hall effects
© EPLA, 2015
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.