Qin H, Shi J, Cao Y, Wu K, Zhang J, Plummer EW, Wen J, Xu ZJ, Gu GD, Guo J. Direct determination of the electron-phonon coupling matrix element in a correlated system.
PHYSICAL REVIEW LETTERS 2010;
105:256402. [PMID:
21231605 DOI:
10.1103/physrevlett.105.256402]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Indexed: 05/30/2023]
Abstract
High-resolution electron energy loss spectroscopy measurements have been carried out on an optimally doped cuprate Bi(2)Sr(2)CaCu(2)O(8+δ). The momentum-dependent energy and linewidth of an A1 optical phonon were obtained. Based on these data as well as detailed knowledge of the electronic structure, we developed a scheme to determine the electron-phonon coupling (EPC) matrix element related to a specific phonon mode. Such an approach is general and applicable to elucidating the full structure of EPC in a system with anisotropic electronic structure.
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