| Publication Type |
Journal Article |
| School or College |
College of Science |
| Department |
Physics |
| Creator |
Vardeny, Zeev Valentine; Symko, Orest George |
| Other Author |
Han, S. G.; Koren, G. |
| Title |
Femtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor films |
| Date |
1991-03 |
| Description |
We have studied the transient electronic response of YBa2Cu307-δ epitaxialy grown H T c superconductor thin films in the femtosecond time domain, using transient photoinduced reflectivity (AR) with 60 fsec time resolution. For temperatures T>Tc only a bolometric signal was observed with ARrO. For T<Tc, AR<O with a temperature dependent rise time of order 300 fsec followed by a relaxation (of order 3 psec) into a state with ARzO. The results for T<Tc are explained in terms of quasi-particle (QP) electronic response giving AR<O. Thus the femtosecond rise time is interpreted as avalanche multiplication of QP across the gap 2A and the subsequent picosecond relaxation as QP recombination. The QP optical response is explained within the two fluid model. |
| Type |
Text |
| Publisher |
Institute of Electrical and Electronics Engineers (IEEE) |
| Journal Title |
IEEE Transactions on Magnetics |
| Volume |
27 |
| Issue |
2 |
| First Page |
1548 |
| Last Page |
1551 |
| DOI |
10.1109/20.133479 |
| citatation_issn |
189464 |
| Subject |
Femtosecond dynamics; YBa2Cu3O7-8; Transient electronic response; Transient optical response |
| Subject LCSH |
Femtochemistry; Superconductors -- Optical properties; Quasiparticles (Physics); Thin films -- Optical properties; Superconductors |
| Language |
eng |
| Bibliographic Citation |
Han, S. G., Vardeny, Z. V., Symko, O. G., & Koren, G. (1991). Femtosecond dynamics of quasi-particles in YBa2Cu3O7-δ superconductor films. IEEE Transactions on Magnetics, 27(2), 1548-51. |
| Rights Management |
(c) 1991 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. http://dx.doi.org/10.1109/20.133479 |
| Format Medium |
application/pdf |
| Format Extent |
287,587 bytes |
| Identifier |
ir-main,9678 |
| ARK |
ark:/87278/s6dn4p5t |
| Setname |
ir_uspace |
| ID |
702538 |
| Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6dn4p5t |
