ELFT HÍRADÓ

[tcsaba <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


                          Wataru Izumida
                        (Tohoku University)

           Zero energy edge states in carbon nanotubes
                   with superconducting pairing


Recent study has shown emergence of Majorana quasiparticles as zero 
energy edge states in carbon nanotubes in proximity with a 
superconductor by tuning the system having a helical pair by applying 
magnetic field [1].
In this talk, I will show that, even in the absence of magnetic fields, 
zero energy edge states can also emerge in the nanotubes as a combined 
effect of curvature-induced Dirac point shift and strong superconducting 
coupling between nearest-neighbor sites [2].  These edge states exist in 
pair, thus they are in contrast to the Majorana quasiparticles [1].


[1] M. Marganska, L. Milz, W. Izumida, C. Strunk, M. Grifoni, 
arXiv:1711.03616.
[2] W. Izumida, L. Milz, M. Marganska, M. Grifoni, Phys. Rev. B 96, 
125414 (2017)


Időpont: 2018. február 23. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba