Spectral signatures of critical charge and spin fluctuations in cuprates
We discuss how Raman spectra of high temperature superconducting cuprates are affected by nearly critical spin and charge collective modes, which are coupled to charge carriers near a stripe quantum critical point. We find that specific fingerprints of nearly critical collective modes can be observe...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
4 July 2009
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| In: |
Physica. B, Condensed matter
Year: 2009, Jahrgang: 404, Heft: 19, Pages: 3070-3074 |
| ISSN: | 1873-2135 |
| DOI: | 10.1016/j.physb.2009.07.007 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/j.physb.2009.07.007 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S092145260900547X 
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| Verfasserangaben: | M. Grilli, S. Caprara, C. Di Castro, T. Enss, R. Hackl, B. Muschler, W. Prestel |
MARC
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| 245 | 1 | 0 | |a Spectral signatures of critical charge and spin fluctuations in cuprates |c M. Grilli, S. Caprara, C. Di Castro, T. Enss, R. Hackl, B. Muschler, W. Prestel |
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| 520 | |a We discuss how Raman spectra of high temperature superconducting cuprates are affected by nearly critical spin and charge collective modes, which are coupled to charge carriers near a stripe quantum critical point. We find that specific fingerprints of nearly critical collective modes can be observed and that the selectivity of Raman spectroscopy in momentum space may be exploited to distinguish the spin and charge contribution. We apply our results to discuss the spectra of high-Tc superconducting cuprates finding that the collective modes should have masses with substantial temperature dependence in agreement with their nearly critical character. Moreover spin modes have larger masses and are more diffusive than charge modes indicating that in stripes the charge is nearly ordered, while spin modes are strongly overdamped and fluctuating with high frequency. | ||
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