Objectif It is well established now that copper-oxide high-temperature superconductors are characterized by two distinguished properties, namely, d-symmetry of the superconducting order parameter and normal-state pseudogap observed in the under doped regime. However, these fundamental features have been found experimentally only for hole-doped copper oxides, whereas properties of the electron-doped materials are profoundly different (this phenomenon is called electron-hole asymmetry). It should be emphasized that all the experiments for the electron-doped materials were performed using copper-oxides samples, which are suspected to have defects in the oxygen sublattice. These defects can mask intrinsic properties of the CuO2 planes, such as the normal-state pseudogap as well as signature of the d-wave paring, making thus hardly possible unambiguous interpretation of the results obtained.The aim of the present project is to perform for the first time experimental study of the electronic state of the electron-doped copper oxides using a new generation of the infinite layer samples Sr1-xRxCuO2 (R=La, Pr; 0 < x < 0.15) electron-doped character of which can be firmly confirmed. The suggested experiments include NMR measurements of the normal-state spin susceptibility, with the focusing on the normal-state pseudogap behaviour in the underdoped regime. Inelastic neutron scattering technique will be employed to search for the crystalline electric field excitations, with the focusing on the local lowering of the space symmetry due to doping of the CuO2 plane with charge carriers as well as on a formation of clusters of undoped, intermediately doped and heavily doped character) frustrated phase separation). Normal-state transport (electrical resistivity, Hall effect, thermopower), structural and magnetic properties in the superconducting state of the infinite-layer compounds under study will also be investigated. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Thème(s) 1B - Condensed Matter, Optics and Plasma Physics OPEN - OPEN Call Appel à propositions Data not available Régime de financement Data not available Coordinateur Eidg. Technische Hochschule Zurich & Paul Scherrer Institut Contribution de l’UE Aucune donnée Adresse PSI West 5232 Villigen PSI Suisse Voir sur la carte Coût total Aucune donnée Participants (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire Russian Academy of Sciences Russie Contribution de l’UE Aucune donnée Adresse S. Kovalevskaya, 18 620219 Ekaterinburg Voir sur la carte Coût total Aucune donnée Russian Academy of Sciences Russie Contribution de l’UE Aucune donnée Adresse 142092 Troitsk, Moscow region Voir sur la carte Coût total Aucune donnée Rutherford Appleton Laboratory Royaume-Uni Contribution de l’UE Aucune donnée Adresse OX11 OQX Chilton, Didcot, Oxfordshire Voir sur la carte Coût total Aucune donnée
