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arxiv: cond-mat/0403521 · v3 · submitted 2004-03-19 · ❄️ cond-mat.supr-con

Coupling Of The B1g Phonon To The Anti-Nodal Electronic States of Bi2Sr2Ca0.92Y0.08Cu2O(8+delta)

T. Cuk , F. Baumberger , D.H. Lu , N. Ingle , X.J. Zhou , H. Eisaki , N. Kaneko , Z. Hussain
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T.P. Devereaux N. Nagaosa Z.-X. Shen
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classification ❄️ cond-mat.supr-con
keywords electronicbi2sr2ca0couplingcu2odeltamodephononrenormalization
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Angle-resolved photoemission spectroscopy (ARPES) on optimally doped Bi2Sr2Ca0.92Y0.08Cu2O(8+delta) uncovers a coupling of the electronic bands to a 40 meV mode in an extended k-space region away from the nodal direction, leading to a new interpretation of the strong renormalization of the electronic structure seen in Bi2212. Phenomenological agreements with neutron and Raman experiments suggest that this mode is the B1g oxygen bond-buckling phonon. A theoretical calculation based on this assignment reproduces the electronic renormalization seen in the data.

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