Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors
By Alessandra Lanzara, P. Bogdanov, Xingjiang Zhou, S. Kellar, D. Feng, E. Lu, Tsuneya Yoshida, H. Eisaki, A. Fujimori, K. Kishio and 5 more. Nature, 2001
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Coupling between electrons and phonons (lattice vibrations) drives the formation of the electron pairs responsible for conventional superconductivity. The lack of direct evidence for electron–phonon coupling in the electron dynamics of the high-transition-temperature superconductors has driven an intensive search for an alternative mechanism. A coupling of an electron with a phonon would result in an abrupt change of its velocity and scattering rate near the phonon energy. Here we use angle-resolved photoemission spectroscopy to probe electron dynamics—velocity and scattering rate—for three different families of copper oxide superconductors. We see in all of these materials an abrupt change of electron velocity at 50–80 meV, which we cannot explain by any known process other than to invoke coupling with the phonons associated with the movement of the oxygen atoms. This suggests that electron–phonon coupling strongly influences the electron dynamics in the high-temperature superconductors, and must therefore be included in any microscopic theory of superconductivity.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/fd31c6f2834faafd8f4c95ff1d2ec755b7ae77bc
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Citations in the corpus
- Fröhlich polaron and bipolaron: recent developments (2009, background): “…(Khasanov et al. , 2004; Zhao and Morris , 1995; Zhao et al. , 1997), high resolution angle resolved photoemission (ARPES) (Gweon et al. , 2004; Lanzara et al. , 2001; Meevasana et al. , 2006), a number of earlier optical (Calvani et al. , 1994; Mihailović et al. , 1990; Zamboni et al. ,…”
- Electrodynamics of correlated electron materials (2011, background): “In addition, angle resolved photoemmision (Bogdanov et al., 2000; Lanzara et al., 2001; Meevasana et al., 2006) and tunneling spectroscopy (Lee et al., 2006a; Levy de Castro et al., 2008; Zasadzinski et al., 2001) spectra show clear indications of a peak in the electron-boson coupling function at…”
- Progress and perspectives on electron-doped cuprates (2009, background): “This has been inferred from both possible phonon signatures in the charge spectra (Lanzara et al., 2001; Lee et al., 2006a), as well as directly in the doping induced softening of a number of high-frequency oxygen bond-stretching modes in many p−type cuprates as observed by neutron and x-ray…”
- Angle-resolved photoemission studies of quantum materials (2020, neutral): “2, electron-phonon interactions (Balasubramanian et al., 1998; Hengsberger et al., 1999; Lanzara et al., 2001; Valla et al., 1999b), electron-electron interactions (Pines and Nozières, 1966), and spin-orbit coupling (LaShell et al., 1996) each have distinct signatures in the ARPES spectra, visible…”
- Angle-resolved photoemission studies of the cuprate superconductors (2002, background): “…insulator (Wells et al., 1995), of the normal-state pseudogap (Ding, Yokoya, et al., 1996; Loeser et al., 1996; Marshall et al., 1996), of spin-charge separation in one-dimensional cuprates (Kim et al., 1996), and of strong electron-proton interaction in p-type cuprates (Lanzara et al., 2001).”