Origin of large thermopower in LiRh$_2$O$_4$ (2008)
Arita, R., Kuroki, K., Held, K., Lukoyanov, A. V., Skornyakov, S., Anisimov, V. I.
Motivated by the newly synthesized mixed-valent spinel LiRh$_2$O$_4$ for which a large thermopower is observed in the metallic cubic phase above 230K [Okamoto {\it et al.} (arXiv:0806.2504)], we...
Doped Mott insulator as the origin of heavy Fermion behavior in LiV2O4 (2007)
Arita, R., Held, K., Lukoyanov, A. V., Anisimov, V. I.
We investigate the electronic structure of LiV2O4, for which heavy fermion behavior has been observed in various experiments, by the combination of the local density approximation and dynamical mean...
Sr$_2$(Ba$_2$)VO$_4$ under pressure -- an orbital switch and potential $d^1$ superconductor (2006)
Arita, R., Yamasaki, A., Held, K., Matsuno, J., Kuroki, K.
We study Sr$_2$(Ba$_2$)VO$_4$ under high pressure by means of the local density approximation + dynamical mean field theory method. While Sr$_2$VO$_4$ is a 1/6-filling three-band system at ambient...
Metal Induced Gap States at tetratetracontane/Cu Interface (2006)
Kiguchi, M., Yoshikawa, G., Saiki, K., Arita, R., Aoki, H.
We have shown, both experimentally and theoretically, that the metal-induced gap states (MIGS) can exist in epitaxially grown organic-insulator/metal interfaces. The material chosen is...
Metal Induced Gap States at tetratetracontane/Cu Interface (2006)
Kiguchi, M., Yoshikawa, G., Saiki, K., Arita, R., Aoki, H.
We have shown, both experimentally and theoretically, that the metal-induced gap states (MIGS) can exist in epitaxially grown organic-insulator/metal interfaces. The material chosen is...
Metal Induced Gap States at tetratetracontane/Cu Interface (2006)
Kiguchi, M., Yoshikawa, G., Saiki, K., Arita, R., Aoki, H.
We have shown, both experimentally and theoretically, that the metal-induced gap states (MIGS) can exist in epitaxially grown organic-insulator/metal interfaces. The material chosen is...
Onari, S., Arita, R., Kuroki, K., Aoki, H.
We explore how the superconductivity arising from the on-site electron-electron repulsion changes when the repulsion is made long-ranged, 1/r-like interaction by introducing an extended Hubbard model...
Crossover from d-wave to p-wave pairing in the t-t' Hubbard model at zero temperature (2006)
We develop an algorithm which employs the projective quantum Monte Carlo method for solving the equations of the dynamical cluster approximation at zero temperature, and apply it for studying pair...
Sakai, S., Arita, R., Aoki, H.
We propose a new quantum Monte Carlo method especially intended to couple with the dynamical mean-field theory. The algorithm is not only much more efficient than the conventional Hirsch-Fye...
Kuroki, K., Onari, S., Tanaka, Y., Arita, R., Nojima, T.
Motivated by recent experiments and band calculation results, we investigate the possibility of superconductivity originating from the a(1g) band of NaxCoO2 center dot yH(2)O assuming the absence of...
Sakai, S., Arita, R., Held, K., Aoki, H.
We propose to combine the Trotter decomposition and a series expansion of the partition function for Hund's exchange coupling in a quantum Monte Carlo (QMC) algorithm for multiorbital systems that...
Some clarifications on cond-mat/0508763 by M. I. Katsnelson (2005)
Feldbacher, M., Arita, R., Held, K., Assaad, F. F.
Katsnelson submitted his Comment on our paper "Projective Quantum Monte Carlo Method for the Anderson Impurity Model and its Application to Dynamical Mean Field Theory" to Phys. Rev. Lett. in May...
From d- to p-wave pairing in the t-t' Hubbard model at zero temperature (2005)
We develop a DCA(PQMC) algorithm which employs the projective quantum Monte Carlo (PQMC) method for solving the equations of the dynamical cluster approximation (DCA) at zero temperature, and apply...
Nonlinear Transport in One-Dimensional Mott Insulator in Strong Electric Fields (2005)
Time-dependent Schroedinger's equation is integrated for a one-dimensional strongly-correlated electron system driven by large electric fields. For larger electric fields, many-body Landau-Zener...
Orbital-selective Mott-Hubbard transition in the two-band Hubbard model (2005)
Recent advances in the field of quantum Monte Carlo simulations for impurity problems allow --within dynamical mean field theory-- for a more thorough investigation of the two-band Hubbard model with...
Onari, S., Arita, R., Kuroki, K., Aoki, H.
The idea of raising Tc in the spin-fluctuation mediated superconductivity on disconnected Fermi surfaces with the gap function changing sign across but not within the Fermi pockets, proposed by...
Tanuma, Y., Kuroki, K., Tanaka, Y., Arita, R., Kashiwaya, S., Aoki, H.
We propose that anisotropic $p$-, $d$-, or $f$-wave pairing symmetries can be distinguished from a tunneling spectroscopy in the presence of magnetic fields, which is exemplified here for a model...
Arita, R., Kuroki, K., Aoki, H., Yajima, A., Tsukada, M., Watanabe, S., ...
We have examined a Hubbard model on a chain of squares, which was proposed by Yajima et al as a model of an atomic quantum wire As/Si(100), to show that the flat-band ferromagnetism according to a...