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Gruninger M, van Der Marel D, Tsvetkov AA, et al. Observation of out-of-phase bilayer plasmons in YBa(2)Cu(3)O(7-delta). Phys Rev Lett. 2000;84(7):1575-8doi: 10.1103/PhysRevLett.84.1575.
Gruninger, M., van Der Marel D, Tsvetkov, A. A., & Erb, A. (2000). Observation of out-of-phase bilayer plasmons in YBa(2)Cu(3)O(7-delta). Physical review letters, 84(7), 1575-8. https://doi.org/10.1103/PhysRevLett.84.1575
Gruninger, et al. "Observation of out-of-phase bilayer plasmons in YBa(2)Cu(3)O(7-delta)." Physical review letters vol. 84,7 (2000): 1575-8. doi: https://doi.org/10.1103/PhysRevLett.84.1575
Gruninger M, van Der Marel D, Tsvetkov AA, Erb A. Observation of out-of-phase bilayer plasmons in YBa(2)Cu(3)O(7-delta). Phys Rev Lett. 2000 Feb 14;84(7):1575-8. doi: 10.1103/PhysRevLett.84.1575. PMID: 11017571.
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Phys Rev Lett. 2000 Feb 14;84(7):1575-8. doi: 10.1103/PhysRevLett.84.1575.

Observation of out-of-phase bilayer plasmons in YBa(2)Cu(3)O(7-delta).

Physical review letters

Gruninger, van Der Marel D, Tsvetkov, Erb

Affiliations

  1. Laboratory of Solid State Physics, MSC, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

PMID: 11017571 DOI: 10.1103/PhysRevLett.84.1575

Abstract

The temperature dependence of the c-axis optical conductivity sigma(omega) of optimally and overdoped YBa2Cu3Ox ( x = 6.93 and 7) is reported in the far- (FIR) and midinfrared (MIR) range. Below T(c) we observe a transfer of spectral weight from the FIR not only to the condensate at omega = 0, but also to a new peak in the MIR. This peak is naturally explained as a transverse out-of-phase bilayer plasmon by a model for sigma(omega) which takes the layered crystal structure into account. With decreasing doping the plasmon shifts to lower frequencies and can be identified with the surprising and so far not understood FIR feature reported in underdoped bilayer cuprates.

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