Recent experiments on triangular lattice organic Mott insulators have found evidence for a two-dimensional 2D spin liquid in close proximity to the metal-insulator transition. A Gutzwiller wave function study of the triangular lattice Heisenberg model with a four-spin ring exchange term appropriate in this regime has found that the projected spinon Fermi sea state has a low variational energy. ...

The multifractal properties of electronic eigenstates at the metal-insulator transition of a two-dimensional disordered tight-binding model with spin-orbit interaction are investigated numerically. The correlation dimensions of the spectral measure D̃2 and of the fractal eigenstate D2 are calculated and shown to be related by D2 = 2D̃2. The exponent η = 0.35 ± 0.05 describing the energy correlati...

I. Leonov,1 Dm. Korotin,2 N. Binggeli,3 V. I. Anisimov,2 and D. Vollhardt1 1Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg 86135, Germany 2Institute of Metal Physics, S. Kovalevskoy Street 18, 620219 Yekaterinburg GSP-170, Russia 3Abdus Salam International Center for Theoretical Physics, INFM-CNR Democritos Natio...

Supplemental Information for A new route to the Mott-Hubbard metal-insulator transition: Strong correlations effects in Pr0.7Ca0.3MnO3 Hong Sub Lee, Sun Gyu Choi, Hyung-Ho Park & M. J. Rozenberg Department of Materials Science and Engineering, Yonsei University, Seodaemun-Ku, Seoul 120-749, Korea, Laboratoire de Physique des Solides, CNRS-UMR 8502 Université Paris-Sud, Orsay 91405, France, Depa...

Using t(2g) Wannier functions, a low-energy Hamiltonian is derived for orthorhombic 3d(1) transition-metal oxides. Electronic correlations are treated with a new implementation of dynamical mean-field theory for noncubic systems. Good agreement with photoemission data is obtained. The interplay of correlation effects and cation covalency (GdFeO3-type distortions) is found to suppress orbital fl...

chemical nature, thermodynamic and kinetic properties of metal cations in aqueous solutions are described and discussed in terms of structural factors controlling physical properties of the systems. The structure of hydrated cations, reaction mechanism of water exchange on the cations, hydrolytic phenomena and acidity of the cations are presented. Correlations between coordination states of the...

The competition of charge, orbital, and ferromagnetic interactions in lay-ered manganites is investigated by magneto-Raman scattering spectroscopy. We find that the colossal magnetoresistance effect in the layered compounds results from the interplay of the orbital and ferromagnetic double-exchange correlations. Inelastic scattering by charge-order fluctuations dominates the quasiparticle dynam...

I. Leonov,1 A. I. Poteryaev,2,3 V. I. Anisimov,2 and D. Vollhardt1 1Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany 2Institute of Metal Physics, Sofia Kovalevskaya Street 18, 620219 Yekaterinburg GSP-170, Russia 3Institute of Quantum Materials Science, 620107 Yekaterinburg, Russia (Received 3 Octo...

We explore the effect of pressure on the electronic properties of the ferromagnetic Mott-Hubbard insulator YTiO3. We show that the pressure-induced insulator-metal transition is accompanied by anisotropic structural changes driven by the competition between strongly orbital dependent one-electron hopping and strong, multiorbital electronic correlations in the real crystal structure of YTiO3. Ou...