12 papers
Magnetic bound states in the quarter-filled ladder system }
P. Lemmens, M. Fischer, G. Els +6
Raman scattering in the quarter-filled spin ladder system alpha'-NaV_2O_5 shows in the dimerized singlet ground state () an unexpected sequence of three magnetic…
Magnetic Bound States in Dimerized Quantum Spin Systems
P. Lemmens, M. Fischer, M. Grove +5
Magnetic bound states are a general phenomenon in low dimensional antiferromagnets with gapped singlet states. Using Raman scattering on three compounds as dedicated examples we sh…
NaV_2O_5 as a quarter-filled ladder compound
H. Smolinski, C. Gros, W. Weber +4
A new X-ray diffraction study of the one-dimensional spin-Peierls compound α-NaV_2O_5 reveals a centrosymmetric (Pmmn) crystal structure with one type of V site, contrary to the pr…
Magnetic Resonance in the Spin-Peierls compound
S. Schmidt, W. Palme, B. Lüthi +3
We present results from magnetic resonance measurements for 75-350 GHz in '-NaVO. The temperature dependence of the integrated intensity indicates that we observe tr…
Interference of a first-order transition with the formation of a spin-Peierls state in alpha'-NaV2O5?
M. Koeppen, D. Pankert, R. Hauptmann +4
We present results of high-resolution thermal-expansion and specific-heat measurements on single crystalline alpha'-NaV2O5. We find clear evidence for two almost degenerate phase t…
Effects of in-chain and off-chain substitutions on spin fluctuations in the spin-Peierls compound CuGeO_3
P. Lemmens, M. Fischer, G. Güntherodt +6
The effect of in-chain and off-chain substitutions on 1D spin fluctuations in the spin-Peierls compound CuGeO_3 has been studied using Raman scattering in order to understand the i…