Boldizsar Janko: Research Interests

Superconductor-insulator transition in uniform disordered thin films

Single electron tunneling (SET) phenomena

• Number parity effects in small superconductors
• Superconductivity in the canonical ensemble
• Quantum size effects in superconductors: critical size and validity of Anderson's criterion
• Cooper instability and the parity restriction
• Josephson tunneling phenomena in the presence of charging
• Diffusion limited recombination in Coulomb blockaded superconductors
• Superconducting SET transistor

Raman scattering in one dimensional S=1 Heisenberg spin systems

Nonequilibrium phenomnena at a normal-superconductor (N-S) phase boundary

• Resistive anomaly at N-S interface
• Long range proximity effect
• Dynamics of an N-S interface at a geometrical boundary

Vortex core states and nonequilibrium vortex dynamics

• Raman scattering off bound vortex core states
• Self consistency effects in nonequilibrium vortex motion

Strongly correlated fermion systems

• nonperturbative methods for investigating the low and very high dimensional limit
• The interplay between diagonal and off-diagonal long-range order in narrow-band systems with Hubbard-type interaction