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Exact supersymmetry in the relativistic hydrogen atom in general dimensions -- supercharge and the generalized Johnson-Lippmann operator
Hosho Katsura, Hideo Aoki
A Dirac particle in general dimensions moving in a 1/r potential is shown to have an exact N = 2 supersymmetry, for which the two supercharge operators are obtained in terms of (a…
Electronic structure of an electron on the gyroid surface, a helical labyrinth
M. Koshino, H. Aoki
Previously reported formulation for electrons on curved periodic surfaces is used to analyze the band structure of an electron bound on the gyroid surface (the only triply-periodic…
Metal-induced gap states in epitaxial organic-insulator/metal interfaces
Manabu Kiguchi, Ryotaro Arita, Genki Yoshikawa +8
We have shown, both experimentally and theoretically, that the metal-induced gap states (MIGS) can exist in epitaxially grown organic insulator/metal interfaces. The experiment is…
Breakdown of an Electric-Field Driven System: a Mapping to a Quantum Walk
Takashi Oka, Norio Konno, Ryotaro Arita +1
Quantum transport properties of electron systems driven by strong electric fields are studied by mapping the Landau-Zener transition dynamics to a quantum walk on a semi-infinite o…
A new numerical algorithm for the double-orbital Hubbard model -- Hund-coupled pairing symmetry in the doped case
Shiro Sakai, Ryotaro Arita, Hideo Aoki
In order to numerically study electron correlation effects in multi-orbital systems, we propose a new type of discrete transformation for the exchange (Hund's coupling) and pair-ho…
Off-site-repulsion induced Triplet Superconductivity: a possibility of chiral p pairing in SrRuO
Ryotaro Arita, Seiichiro Onari, Kazuhiko Kuroki +1
In order to probe the effect of charge fluctuations on triplet pairing, we study the pairing symmetry in the one-band Hubbard model having the off-site Coulomb repulsion () on t…
Design of electron correlation effects in interfaces and nanostructures
Hideo Aoki
We propose that one of the best grounds for the materials design from the viewpoint of {\it electron correlation} such as ferromagnetism, superconductivity is the atomically contro…
Polar surface engineering in ultra-thin MgO(111)/Ag(111) -- possibility of metal-insulator transition and magnetism
Ryotaro Arita, Yoshiaki Tanida, Shiro Entani +3
A recent report [Kiguchi {\it et al.}, Phys. Rev. B {\bf 68}, 115402 (2003)] that the (111) surface of 5 MgO layers grown epitaxially on Ag(111) becomes metallic to reduce the elec…