Objectif I propose to study ‘neutral excitations’ in 2d and 1d electronic systems. Such excitations, rarely studied, are unique since they are chargeless but may carry energy. Being byproducts of electron interaction, they come in a few flavors: (i) Downstream modes in composite edge channels of the integer quantum Hall effect (IQHE) regime; (ii) Upstream modes in the fractional quantum Hall effect (FQHE) regime; and (iii) Zero energy Majorana states (localized or propagating quasi-particles), in non-abelian FQHE states and in 1d topological P-wave superconductors. My main interests in neutral modes in the QHE regime are: (a) Their direct association with the nature of the wavefunction of the quantum state; (b) Being excited when a charge mode is being partitioned (say, by a quantum point contact), they may play a prime role in dephasing interference of quasi-particles due to the energy they rob (in the partitioning process). As for detecting Majorana quasi-particles, and aside from the exciting physics, their non-abelian nature makes them attractive as building blocks in ‘decoherence resistant’ systems. Based on our acquired abilities, such as material growth, processing techniques, and sensitive measurement techniques, I plan to perform experiments, which include: thorough studies of downstream and upstream neutral modes via shot noise and thermoelectric current measurements; proving (or disproving) their involvement in dephasing fractionally charged quasi-particles; growing and processing structures that harbor Majorana states (in 1d nano-wires and in 2d FQHE regime; and, possibly, eventually, manipulate Majorana states (by coupling and braiding). Experiments will employ, e.g. ultra-low temperatures, sensitive shot noise measurements, cross-correlation of current fluctuations, and interference of quasi-particles (charge and neutral) in novel interferometers. Champ scientifique natural sciencesphysical sciencescondensed matter physicsmesoscopic physicsnatural sciencesphysical scienceselectromagnetism and electronicssuperconductivity Programme(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) ERC-AG-PE3 - ERC Advanced Grant - Condensed matter physics Appel à propositions ERC-2013-ADG Voir d’autres projets de cet appel Régime de financement ERC-AG - ERC Advanced Grant Institution d’accueil WEIZMANN INSTITUTE OF SCIENCE Contribution de l’UE € 2 428 042,00 Adresse HERZL STREET 234 7610001 Rehovot Israël Voir sur la carte Type d’activité Higher or Secondary Education Establishments Chercheur principal Mordehai (Moty) Heiblum (Prof.) Contact administratif Gabi Bernstein (Ms.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée Bénéficiaires (1) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire WEIZMANN INSTITUTE OF SCIENCE Israël Contribution de l’UE € 2 428 042,00 Adresse HERZL STREET 234 7610001 Rehovot Voir sur la carte Type d’activité Higher or Secondary Education Establishments Chercheur principal Mordehai (Moty) Heiblum (Prof.) Contact administratif Gabi Bernstein (Ms.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée