ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

okt. 10. péntek 14h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Kedar Damle (Tata Institute of Fundamental Research, Mumbai, India):
Percolation and chaos in maximum-density dimer packings and their physical
consequences

We connect the zero energy states of bipartite tight-binding models with
bond disorder and vacancy disorder, as well as collective zero-energy
Majorana excitations of networks (not necessarily bipartite) of coupled
localized Majorana modes to the random geometry of regions of the
underlying disordered lattice which host the monomers of any
maximum-density dimer packing of the lattice. This allows us to place upper
bounds on the localization length of the zero-energy Green function in both
cases, and use these upper bounds to draw conclusions about heat transport
in the Majorana networks or electrical transport in binary alloys described
by such bipartite random hopping models. For the Majorana contribution to
the heat conductance in the mixed triangular vortex lattice state of
topological p+ip superconductors, we argue that our results imply a strong
violation of self-averaging if the positional disorder of the vortex
lattice is strong, and the vacancy-disorder is weak.
[collaborators: Sounak Biswas, Mursalin Islam, and Ritesh Bhola]


Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor