2007/12/11 by Jifeng Yu, Ji-Feng Yu, Kai Ji +2 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1088/1742-6596/108/1/012017
published as J. Phys.: Conf. Ser. 100, 052100 (2008) · 6 pages, 4 figures, Procs. of LEHTSC 2007, submitted to J. Phys.: Conf. Ser
arxiv created 2007/12/11 · openalex publication_date 2008/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
A new path-integral theory is developed to calculate the photoemission spectra (PES) of correlated many-electron systems. The application to the study on Bi 2 Sr 2 CaCu 2 O 8 (Bi2212) and boron-doped diamond (BDD) is discussed in details. It is found that the isotopic shift in the angle-resolved photoemission spectra of Bi2212 is due to the off-diagonal quadratic electron-phonon ( e -ph) coupling, whereas the presence of electron-electron repulsion partially suppresses this effect. For the BDD, a semiconductor-metal phase transition, which is induced by increasing the e -ph coupling and dopant concentration, is reproduced by our theory. Additionally, the presence of Fermi edge and phonon step-like structure in PES is found to be due to a co-existence of itinerant and localized electronic states in BDD.