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Theoretical study on isotopic shift in angle-resolved photoemission spectra of Bi2Sr2CaCu2O8

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arxiv 0711.1488 v1 pith:22REPUP7 submitted 2007-11-09 cond-mat.str-el cond-mat.supr-con

Kai Ji , Keiichiro Nasu This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords angle-resolvedarpesbi2sr2cacu2o8e-phisotopicphotoemissionshiftspectra
verification ladder T0 review T1 audit T2 compute T3 formal

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We develop a path-integral theory to study the angle-resolved photoemission spectra (ARPES) of high-T_c superconductors based on a two-dimensional model for the CuO2 conduction plane, including both electron-electron (e-e) and electron-phonon (e-ph) interactions. Comparing our result with the experimental one of Bi2Sr2CaCu2O8, we find that the experimentally observed isotopic band shift in ARPES is due to the off-diagonal quadratic e-ph coupling, whereas the presence of e-e repulsion partially suppresses this effect.

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