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Evidence for Two-Component High-Temperature Superconductivity in the Femtosecond Optical Response ofYBa2Cu3O7−δ
Abstract
Femtosecond time-resolved spectrocopy has been used to investigate electronic excitations contributing to the superconducting gap function $\ensuremath{\Delta}(\ensuremath{\omega},T)$ in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$. The optical response is strongly peaked at 1.5 eV, and contains two distinct components: one with a characteristic relaxation time of $\ensuremath{\sim}5\mathrm{ps}$, whose amplitude displays a two-fluid-like temperature dependence, and a long-lived component $(>10\mathrm{ns})$ which is consistent with localized quasiparticle states at the Fermi energy. The latter shows activated behavior below ${T}_{c}$ with an activation energy $2{\ensuremath{\Delta}}_{0}\ensuremath{\approx}{3.5kT}_{c}$.
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Cites
Possible highT c superconductivity in the Ba?La?Cu?O system
Bednorz, J. G., & M�ller, K. A. (1986) · Zeitschrift f�r Physik B Condensed Matter · doi:10.1007/bf01303701 · Cited by 14,319
Cited by
Kabanov, V. V., Demsar, J., Podobnik, B., & Mihailovic, D. (1999) · Physical Review B · doi:10.1103/physrevb.59.1497 · Cited by 332
Self-citationDemsar, J., Podobnik, B., Kabanov, V. V., Wolf, T., & Mihailovic, D. (1999) · Physical Review Letters · doi:10.1103/physrevlett.82.4918 · Cited by 279
Self-citationStudy on terahertz emission and optical/terahertz pulse responses with superconductors
Kawayama, I., Zhang, C., Wang, H., & Tonouchi, M. (2013) · Superconductor Science and Technology · doi:10.1088/0953-2048/26/9/093002 · Cited by 30
Metadata
- Authors
- Stevens, C. J., Smith, D., Chen, C., Ryan, J. F., Podobnik, B., Mihailovic, D., Wagner, G. A., & Evetts, J. E.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1997-03-17
- Volume
- 78
- Issue
- 11
- Pages
- 2212-2215
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1593716474
- Cited by
- 173
- References
- 1
- FWCI
- 13.70
- Type
- journal article
- Language
- en
- Open access
- closed
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- Stevens, C. J., Smith, D., Chen, C., Ryan, J. F., Podobnik, B., Mihailovic, D., Wagner, G. A., & Evetts, J. E. (1997). Evidence for Two-Component High-Temperature Superconductivity in the Femtosecond Optical Response ofYBa2Cu3O7−δ. Physical Review Letters. https://doi.org/10.1103/physrevlett.78.2212
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