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6 Result(s)

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  1. No Access

    Article

    Local distribution approach to disordered binary alloys

    We study the electronic structure of the binary alloy and (quantum) percolation model. Our study is based on a self-consistent scheme for the distribution of local Green functions. We obtain detailed results ...

    A. Alvermann, H. Fehske in The European Physical Journal B - Condense… (2005)

  2. No Access

    Article

    Nature of the Peierls- to Mott-insulator transition in 1D

    In order to clarify the physics of the crossover from a Peierls band insulator to a correlated Mott-Hubbard insulator, we analyze ground-state and spectral properties of the one-dimensional half-filled Holstei...

    H. Fehske, A.P. Kampf, M. Sekania… in The European Physical Journal B - Condense… (2003)

  3. No Access

    Article

    Interplay of charge, spin, orbital and lattice correlations in colossal magnetoresistance manganites

    We derive a realistic microscopic model for doped colossal magnetoresistance manganites, which includes the dynamics of charge, spin, orbital and lattice degrees of freedom on a quantum mechanical level. The m...

    A. Weiße, H. Fehske in The European Physical Journal B - Condense… (2002)

  4. No Access

    Article

    A new model to describe the physics of

    In the past different models for the magnetic salt vanadyl pyrophosphate (VO)2P2O7 were discussed. Neither a spin ladder nor an alternating chain are capable to describe recently measured magnetic excitations. In...

    A. Weiße, G. Bouzerar, H. Fehske in The European Physical Journal B - Condense… (1999)

  5. No Access

    Chapter

    The Phase Diagram of the 2D Holstein-t-J Model

    The importance of both strong antiferromagnetic Coulomb correlations as well as strong electron-phonon (EP) interactions has become increasingly recognized as being essential in understanding the superconducti...

    H. Fehske, H. Röder in Nonlinear Coherent Structures in Physics and Biology (1994)

  6. No Access

    Chapter

    A Variational Slave Boson Approach to the Holstein-Hubbard Model

    Research on the high-T c cuprates has focused, once again, interest on strongly coupled electron-phonon (EP) systems. Although it is widely believed that most o...

    H. Fehske, U. Trapper, M. Deeg, H. Büttner in Nonlinear Coherent Structures in Physics a… (1994)