Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1 [electronic resource] : 6La0 4Cu2O6+sigma superconductors
- Berkeley, Calif. : Lawrence Berkeley National Laboratory, 2008.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 4 : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- We report the first measurement of the Cu-O bond stretching phonon dispersion in optimally doped Bi2Sr1.6La0.4Cu2O6+delta using inelastic x-ray scattering. We found a softening of this phonon at q=(0.25,0,0) from 76 to 60 meV, similar to the one reported in other cuprates. A comparison with angle-resolved photoemission data on the same sample revealed an excellent agreement in terms of energy and momentum between the angle-resolved photoemission nodal kink and the soft part of the bond stretching phonon. Indeed, we find that the momentum space where a 63+-5 meV kink is observed can be connected with a vector q=(xi,0,0) with xi>= 0.22, corresponding exactly to the soft part of the bond stretching phonon.
- Published through SciTech Connect.
Physical Review Letter 100 FT
Ikeuchi, K.; Garcia, D.R.; Eisaki, H.; Baron, A.Q.R.; Krisch, M.; Saini, N.L.; Lanzara, Alessandra; Jozwiak, C.; Astuto, M.; Graf, Jeff; d'.
Materials Sciences Division
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