29 citations · 81 across the 14 of their papers we have counts for
14 papers
Aharonov-Bohm-Coulomb Problem in Graphene Ring
Eylee Jung, Mi-Ra Hwang, ChangSoo Park +1
We study the Aharonov-Bohm-Coulomb problem in a graphene ring. We investigate, in particular, the effects of a Coulomb type potential of the form on the energy spectrum of Di…
Diabolical Points in Molecular Magnets with a Four-Fold Easy Axis
Chang-Soo Park, Anupam Garg
We study the points of degeneracy (diabolical points) in magnetic molecules such as Mn_{12}-acetate that have an easy axis of four-fold symmetry. This is done for general magnetic…
Topological Quenching of Spin Tunneling in Mn_12-acetate Molecules
Chang-Soo Park, Anupam Garg
We investigate the topological quenching of spin tunneling in Mn_12-acetate molecules with an applied magnetic field along the hard axis. The model Hamiltonian describing this syst…
Effect of Aharonov-Bohm Phase on Spin Tunneling
ChangSoo Park, D. K. Park
The role of Aharonov-Bohm effect in quantum tunneling is examined when a potential is defined on the and has -fold symmetry. We show that the low-lying energy levels split…
Oscillation of the tunnel splitting in nanospin systems within the particle mapping formalism
Sahng-Kyoon Yoo, Soo-Young Lee, Dal-Ho Yoon +1
The oscillation of tunnel splitting in the biaxial spin system within magnetic field along the anisotropy axis is analyzed within the particle mapping approach, rather than in the…
Quantum-classical phase transition of escape rate in biaxial spin system with an arbitrarily directed magnetic field
Chang-Soo Park, Sahng-Kyoon Yoo, Dal-Ho Yoon
We investigate the escape rate of a biaxial spin particle with an arbitrarily dierected magnetic field in the easy plane, described by Hamiltonian ${\cal H} = -AS_z^2 - BS_x^2 -H_x…