Volume 101, Number 4, February 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||06 March 2013|
Polaron signatures in the phonon dispersion of high-temperature superconducting copper oxides
1 Max-Planck-Institute for Solid State Research - Heisenbergstr. 1, D-70569 Stuttgart, Germany, EU
2 Physik-Institut der Universität Zürich - Winterthurerstr. 190, CH-8057 Zürich, Switzerland
3 Los Alamos National Laboratory - Los Alamos, NM 87545, USA
Received: 22 October 2012
Accepted: 7 February 2013
High-temperature superconducting copper oxides display a variety of both long-range and local lattice anomalies which are related to the onset of the pseudogap phase and / or the onset of superconductivity. Here we show that these anomalies demonstrate polaron formation where specifically the local character of the polarons plays an important role. We predict that unconventional isotope effects will appear in both the long-wavelength and local lattice effects.
PACS: 74.20.-z – Theories and models of superconducting state / 74.72.Gh – Hole-doped / 74.25.Kc – Phonons
© EPLA, 2013
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