Cedergren, Karin (2008) Intrinsic Josephson pi-junctions for novel devices. [Tesi di dottorato] (Inedito)
Anteprima |
PDF
Intrinsic_Josephson_pi-junctions_for_novel_devices.pdf Download (5MB) | Anteprima |
| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Intrinsic Josephson pi-junctions for novel devices |
| Autori: | Autore Email Cedergren, Karin karin.cedergren@chalmers.se |
| Data: | 1 Dicembre 2008 |
| Numero di pagine: | 112 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Istituzioni (extra): | INFM - Coherentia |
| Dipartimento: | Scienze fisiche |
| Dottorato: | Tecnologie innovative per materiali, sensori ed imaging |
| Ciclo di dottorato: | 20 |
| Coordinatore del Corso di dottorato: | nome email Abbate, Giancarlo [non definito] |
| Tutor: | nome email Tafuri, Francesco [non definito] Lombardi, Floriana [non definito] |
| Data: | 1 Dicembre 2008 |
| Numero di pagine: | 112 |
| Parole chiave: | Josephson HTS d-wave grain-boundary biepitaxial |
| Settori scientifico-disciplinari del MIUR: | Area 02 - Scienze fisiche > FIS/03 - Fisica della materia Area 02 - Scienze fisiche > FIS/01 - Fisica sperimentale |
| Depositato il: | 18 Nov 2009 09:53 |
| Ultima modifica: | 19 Gen 2015 11:54 |
| URI: | http://www.fedoa.unina.it/id/eprint/3461 |
| DOI: | 10.6092/UNINA/FEDOA/3461 |
Abstract
The properties of YBCO grain boundary Josephson junctions have been studied experimentally. Due to the d-wave symmetry of the order parameter of YBCO it is possible to have junctions with a 0-π phase discontinuity along the barrier profile. Such 0-π-junctions can have a ground state where spontaneous flux is generated at the discontinuity point. This work has been focused on understanding if it is possible to fabricate biepitaxial grain boundary 0-π-junctions that, despite the unavoidable faceting along the grain boundary line, can have a ground state with spontaneously generated flux. The interest in the biepitaxial technique lies in its flexibility for circuit design. The microstructure and transport properties of the grain boundary junctions have been studied in details. Scanning SQUID Microscope imaging has revealed the presence of spontaneous flux in our junctions. Finally the dynamics of 0-π-junctions compared to conventional 0-junctions have been studied and compared to simulation.
Downloads
Downloads per month over past year
Actions (login required)
 |
Modifica documento |
