ELFT HÍRADÓ

[tcsaba AT eik.bme.hu]

                       M E G H Í V Ó - I N V I T A T I O N

     Seminar series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics

                              Doru Sticlet
                   (CNRS and Université de Bordeaux 1)

                Anderson localization on fractal lattices


The one-parameter scaling theory of localization describes the  
behavior of disordered systems in integer dimensions. We test its  
limits for systems with non-integer dimensions by studying conduction  
on fractal lattices with disorder. Notably, we demonstrate a new  
effect for symplectic Hamiltonians living on certain fractal families  
with Hausdorff dimension lower than two. Analytical arguments and  
numerical simulations show that weak antilocalization corrections  
induce an attractive critical point with a scale-invariant  
conductance. This phenomenon is not seen in integer dimension  
lattices, which have at most a single repulsive critical point,  
marking the metal-insulator transition.


Idöpont: 2015. október 9., 10:15
Helyszín:
BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsöház, szemináriumi szoba

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.