search for




 

Energy Spectrum of Magnetic Quantum Dot in Graphene
New Physics: Sae Mulli
Published online September 18, 2017;  
© 2017 New Physics: Sae Mulli.

Nojoon Myoung, Gukhyung Ihm*
Received August 28, 2017; Revised September 18, 2017; Accepted September 18, 2017.
Abstract
We investigate the eigen energies of magnetic quantum dot which is formed in graphene by inhomogeneous distributions of magnetic fields. The motivation of our study is to overcome the existing difficulties in the formation of quantum structures in graphene via electrostatic confinements. The strongly localized states on the magnetic quantum dot are observed in the quantum Hall regime and are understood by the magnetic edge states circulating either clockwise or anti-clockwise along the boundary of the dot. The eigen energy spectra are shown to be critically depend on the number of missing flux quanta in the magnetic quantum dot.  The existence of localized magnetic edge states can be proved experimentally by measuring the two-terminal conductance of small graphene conductor with magnetic quantum dot formed in the center which reflects the resonant backscattering via the magnetic edge states. 


September 2017, 67 (9)