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74 papers · 1 filter
Domain Structures of Smectic Films Formed by Bent-Shaped Molecules
E. I. Kats, J. Lajzerowicz
We formulate a simple Landau type model describing macroscopic behaviour recently discovered new smectic phases composed of achiral bent-shaped molecules. Films of such smectics ex…
Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV
The D0 Collaboration, B. Abbott
Using the D0 detector, we have studied events produced in proton-antiproton collisions that contain large forward regions with very little energy deposition (``rapidity gaps'') and…
Andreev Reflection and Proximity effect
B. Pannetier, H. Courtois
The Andreev Reflection is the key mechanism for the superconducting proximity effect. It provides phase correlations in a system of non-interacting electrons at mesoscopic scales,…
Antiferromagnetism in a doped spin-Peierls model: classical and quantum behaviors
R. Mélin
We address the problem of antiferromagnetism in a two dimensional model of doped spin-Peierls system, at the classical and quantum levels. A Bethe-Peierls solution is derived for t…
The Isolated Photon Cross Section in p pbar Collisions at sqrt(s) = 1.8 TeV
D0 Collaboration, B. Abbott
We report a new measurement of the cross section for the production of isolated photons, with transverse energies (ET) above 10 GeV and pseudorapidities |eta| < 2.5, in p pbar coll…
Landau Zener method to study quantum phase interference of Fe8 molecular nanomagnets
W. Wernsdorfer, R. Sessoli, A. Caneschi +3
We present details about an experimental method based on the Landau Zener model which allows to measure very small tunnel splittings in molecular clusters Fe8. The measurements…