Session V1: Collective Modes, Phonons in Cuprates
11:15 AM–2:15 PM, Thursday, March 24, 2005
LACC Room: 152
Sponsoring Unit:
DCMP
Chair: Z-X Shen, Stanford University
Abstract ID: BAPS.2005.MAR.V1.2
Abstract: V1.00002 : Electron-Phonon Coupling in the t-J Model
11:51 AM–12:27 PM
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Abstract 
Author:
Andrei Mishchenko
(CREST, Japan Science and Technology Agency (JST))
We present numeric results for ground state and angle resolved photoemission spectra (ARPES) for single hole in $tt't''-J$ model coupled to optical phonons. The systematic-error free diagrammatic Monte Carlo [1,2] is employed where the Feynman graphs for the Matsubara Green function in imaginary time are summed up completely with respect to phonons variables. It is found that interplay of electron-phonon interaction with intrinsic to the holes in Mott insulator interaction with magnons can explain the main puzzles encountered in ARPES experimental studies: anomalous damping in underdoped and moderately doped regime, ``kink,'' anomalous ``universal velocity,'' and giant anomalous isotope effect. Crucial discussions with N.\ Nagaosa and Z.-X.\ Shen are acknowledged. ([1] A.\ S.\ Mishchenko {et.\ al}.\ Phys.\ Rev.\ B {\bf 62} 6317 (2000); [2] A.\ S.\ Mishchenko and N.\ Nagaosa\ Phys.\ Rev.\ Lett.\ {\bf 93} 036402 (2004).)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.MAR.V1.2