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  1. Article

    Open Access

    Emergent charge order from correlated electron-phonon physics in cuprates

    Charge-density wave order is now understood to be a widespread feature of underdoped cuprate high-temperature superconductors, although its origins remain unclear. While experiments suggest that the charge-ord...

    S. Banerjee, W. A. Atkinson, A. P. Kampf in Communications Physics (2020)

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  2. No Access

    Article

    Flux periodicities in loops and junctions with d-wave superconductors

    The magnetic flux periodicity in superconducting loops is reviewed. Whereas quantization of the magnetic flux with hc/2e prevails in sufficiently thick loops with current free interior, the supercurrent in na...

    F. Loder, A.P. Kampf, T. Kopp in The European Physical Journal Special Topics (2009)

  3. Article

    Magnetic flux periodicity of h/e in superconducting loops

    Superconducting loops exhibit macroscopic quantum phenomena that have far-reaching implications; magnetic flux periodicity and flux quantization are the key to our understanding of fundamental properties of su...

    F. Loder, A. P. Kampf, T. Kopp, J. Mannhart, C. W. Schneider… in Nature Physics (2008)

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  4. 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)

  5. No Access

    Chapter and Conference Paper

    Band to Mott Insulator Transition in the Ionic Hubbard Model

    We investigate the ground state phase diagram of the one-dimensional “ionic” Hubbard model with an alternating periodic potential at half filling by numerical diagonalization of finite systems with the Lanczos...

    Ph. Brune, A. P. Kampf in High Performance Computing in Science and Engineering ’01 (2002)

  6. No Access

    Article

    Thermal conductivity and thermal Hall effect in Bi- and Y-based high-T c superconductors

    Measurements of the thermal conductivity (kxx) and the thermal Hall effect (kxy) in high magnetic fields in Y- and Bi-based high-T c superconductors are presented. We describe ...

    B. Zeini, A. Freimuth, B. Büchner, M. Galffy… in The European Physical Journal B - Condense… (2001)

  7. No Access

    Chapter and Conference Paper

    Phase Transitions in Insulating 1D Electron Systems

    We study the ground state phase diagram of different extensions of the one-dimensional Hubbard model at half filling by numerically diagonalizing finite systems with the Lanczos and DMRG method. We discuss the...

    Ph. Brune, A. P. Kampf in High Performance Computing in Science and Engineering 2000 (2001)

  8. No Access

    Article

    Anisotropic scattering rates and antiferromagnetic precursor effects in the t-t'-U Hubbard model

    We have investigated the evolution of the electronic properties of the t-t'-U Hubbard model with hole do** and temperature. Due to the shape of the Fermi surface, scattering from short wavelength spin fluctuati...

    J. Altmann, W. Brenig, A.P. Kampf in The European Physical Journal B - Condense… (2000)

  9. No Access

    Article

    Anisotropy of the energy gap in the insulating phase of the U-t-t' Hubbard model

    We apply a diagrammatic expansion method around the atomic limit ( ) for the U-t-t ' Hubbard model at half filling and finite temperature by means of a continued fraction repre...

    Ph. Brune, A.P. Kampf in The European Physical Journal B - Condense… (2000)

  10. No Access

    Article

    Superconducting/non-superconducting phase boundary in the low temperature tetragonal phase of (La,RE)-Sr-Cu-O

    From measurements of the structural, superconducting and normal state transport properties of rare earth doped La2−xSrxCuO4 we find a phase boundary between a superconducting and a non-superconducting state of th...

    B. Büchner, M. Breuer, M. Cramm, A. Freimuth… in Journal of Low Temperature Physics (1994)