RWTH Aachen University

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 1999 · cond-mat.str-elShow all

7 papers · 2 filters

cond-mat.str-el1999★ 33 cited

Electron-phonon and spin-phonon coupling in NaV $_{2}$ O $_{5}$ : charge fluctuations effect

E. Ya. Sherman, M. Fischer, P. Lemmens +2

We show that the asymmetric crystal environment of the V site in the ladder compound NaV $_{2}$ O $_{5}$ leads to a strong coupling of vanadium 3d electrons to phonons. This coupling…

cond-mat.str-el1999★ 4 cited

Quantum Spin Systems: From Spin Gaps to Pseudo Gaps

P. Lemmens, M. Fischer, M. Grove +5

Many low dimensional spin systems with a dimerized or ladder-like antiferromagnetic exchange coupling have a gapped excitation spectrum with magnetic bound states within the spin g…

cond-mat.str-el1999★ 35 cited

Stripe Conductivity in La(1.775)Sr(0.225)NiO(4)

Yu. G. Pashkevich, V. A. Blinkin, V. P. Gnezdilov +10

We report Raman light-scattering and optical conductivity measurements on a single crystal of La(1.775)Sr(0.225)NiO(4) which exhibits incommensurate charge-stripe order. The extra…

cond-mat.str-el1999★ 326 cited

Renormalization group analysis of the 2D Hubbard model

Christoph J. Halboth, Walter Metzner

Salmhofer [Commun. Math. Phys. 194, 249 (1998)] has recently developed a new renormalization group method for interacting Fermi systems, where the complete flow from the bare actio…

cond-mat.str-el1999★ 18 cited

On the scaling of the (H-T)-phase diagram of CuGeO $_{3}$

J. Zeman, G. Martinez, P. H. M. van Loosdrecht +2

The H-T phase diagram of CuGeO $_{3}$ has been determined, for different values of the hydrostatic pressure, utilizing optical absorption spectroscopy on the Cu $^{2 +}$ d-d transitions…

cond-mat.str-el1999★ 40 cited

Spin gap behavior and charge ordering in α^{\prime}-NaV_2O_5 probed by light scattering

M. Fischer, P. Lemmens, G. Els +5

We present a detailed analysis of light scattering experiments performed on the quarter-filled spin ladder compound $α^{'}$ -NaV $_{2}$ O $_{5}$ for the temperature range 5 K $\leq$ T$…

cond-mat.str-el1999★ 15 cited

Boundary effects on one-particle spectra of Luttinger liquids

K. Schoenhammer, V. Meden, W. Metzner +2

We calculate one-particle spectra for a variety of models of Luttinger liquids with open boundary conditions. For the repulsive Hubbard model the spectral weight close to the bound…

Electron-phonon and spin-phonon coupling in NaV2​O5​: charge fluctuations effect