https://doi.org/10.1140/epjb/e2018-90070-4
Regular Article
Ballistic transport in aperiodic Labyrinth tiling proven through a new convolution theorem
1
Departamento de Física, Facultad de Ciencias, Universidad Nacional Autónoma de México,
04510
Ciudad de México, Mexico
2
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México,
04510
Ciudad de México, Mexico
a e-mail: chumin@unam.mx
Received:
11
February
2018
Received in final form:
18
April
2018
Published online: 27
June
2018
In this article, we report a distinct convolution theorem developed for the Kubo-Greenwood formula in Labyrinth tiling by transforming the two-dimensional lattice into a set of independent chains with rescaled Hamiltonians. Such transformation leads to an analytical solution of the direct-current conductance spectra, where quantized steps with height of 2g0 are found in Labyrinth tiling with periodic order along the applied electric field direction, in contrast to the step height of g0 observed in the corresponding square lattices, being g0 the conductance quantum. When this convolution theorem is combined with the real-space renormalization method, we are able to address in non-perturbative way the electronic transport in macroscopic aperiodic Labyrinth tiling based on generalized Fibonacci chains. Furthermore, we analytically demonstrate the existence of ballistic transport states in aperiodic Labyrinth tiling. This finding suggests that the periodicity should not be a necessary condition for the single-electron ballistic transport even in multidimensional fully non-periodic lattices.
Key words: Solid State and Materials
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2018