84 citations · 550 across the 31 of their papers we have counts for
6 papers · 1 filter
Metal-insulator transition in anisotropic systems
F. Milde, R. A. Roemer, M. Schreiber
We study the three-dimensional Anderson model of localization with anisotropic hopping, i.e., weakly coupled chains and weakly coupled planes. In our extensive numerical study we i…
Critical behavior of the thermoelectric transport properties in amorphous systems near the metal-insulator transition
C. Villagonzalo, R. A. Roemer, M. Schreiber +1
The scaling behavior of the thermoelectric transport properties in disordered systems is studied in the energy region near the metal-insulator transition. Using an energy-dependent…
Disorder and Two-Particle Interaction in Low-Dimensional Quantum Systems
Rudolf A. Roemer, Michael Schreiber, Thomas Vojta
We review some of the recent results on two-interacting particles (TIP) in low-dimensional disordered quantum models. Special attention is given to the mapping of the problem onto…
Exponents of the localization lengths in the bipartite Anderson model with off-diagonal disorder
Andrzej Eilmes, Rudolf A. Roemer, Michael Schreiber
We investigate the scaling properties of the two-dimensional (2D) Anderson model of localization with purely off-diagonal disorder (random hopping). In particular, we show that for…
Integrable impurities for an open fermion chain
X. -W. Guan, U. Grimm, R. A. Roemer +1
Employing the graded versions of the Yang-Baxter equation and the reflection equations, we construct two kinds of integrable impurities for a small-polaron model with general open…
Off-diagonal disorder in the Anderson model of localization
P. Biswas, P. Cain, R. A. Roemer +1
We examine the localization properties of the Anderson Hamiltonian with additional off-diagonal disorder using the transfer-matrix method and finite-size scaling. We compute the lo…