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cond-mat.str-el2001★ 14 cited
Peierls-insulator Mott-insulator transition in 1D
H. Fehske, G. Wellein, A. Weiße +3
In an attempt to clarify the nature of the crossover from a Peierls band insulator to a Mott Hubbard insulator, we analyze ground-state and spectral properties of the one-dimension…
cond-mat.str-el2001★ 4 cited
Density-Matrix Algorithm for Phonon Hilbert Space Reduction in the Numerical Diagonalization of Quantum Many-Body Systems
Alexander Weiße, Gerhard Wellein, Holger Fehske
Combining density-matrix and Lanczos algorithms we propose a new optimized phonon approach for finite-cluster diagonalizations of interacting electron-phonon systems. To illustrate…