4,449 research outputs found
Observation of eta-mesic nuclei in photoreactions: results and perspectives
Recent results from the LPI experiment on searching for eta-mesic nuclei in
photoreactions are discussed and further perspectives are summarized.Comment: 4 pages, 4 figures. Talk given by G.A.S. at NSTAR01, Mainz, German
Anomalous Spin Dynamics in Doped Quantum Antiferromagnets
Finite-temperature spin dynamics in planar t-J model is studied using the
method based on the Lanczos diagonalization of small systems. Dynamical spin
structure factor at moderate dopings shows the coexistence of free-fermion-like
and spin-fluctuation timescales. At T<J, the low-frequency and static
susceptibility show pronounced T dependence, supporting a scenario, related to
the marginal Fermi-liquid one, for the explanation of neutron-scattering and
NMR-relaxation experiments in cuprates. Calculated NMR relaxation rates
reasonably reproduce experimental ones.Comment: 10 pages + 4 figures, Postscript in uuencoded compressed tar file,
IJS-TP-94/2
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