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Title: Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1:6La0:4Cu2O6+sigma superconductors

Abstract

We report the first measurement of the Cu-O bond stretching phonon dispersion in optimally doped Bi2Sr1.6La0.4Cu2O6+delta using inelastic x-ray scattering. We found a softening of this phonon at q=(0.25,0,0) from 76 to 60 meV, similar to the one reported in other cuprates. A comparison with angle-resolved photoemission data on the same sample revealed an excellent agreement in terms of energy and momentum between the angle-resolved photoemission nodal kink and the soft part of the bond stretching phonon. Indeed, we find that the momentum space where a 63+-5 meV kink is observed can be connected with a vector q=(xi,0,0) with xi>= 0.22, corresponding exactly to the soft part of the bond stretching phonon.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Materials Sciences Division
OSTI Identifier:
938787
Report Number(s):
LBNL-1032E
TRN: US0806129
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Physical Review Letter
Additional Journal Information:
Journal Volume: 100; Related Information: Journal Publication Date: 4 June 2008
Country of Publication:
United States
Language:
English
Subject:
75; CUPRATES; PHONONS; PHOTOEMISSION; SCATTERING; SUPERCONDUCTORS; VECTORS; ARPES IXS INS phonon superconductivity

Citation Formats

Graf, Jeff, d', Astuto, M, Jozwiak, C, Garcia, D R, Saini, N L, Krisch, M, Ikeuchi, K, Baron, A Q.R., Eisaki, H, and Lanzara, Alessandra. Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1:6La0:4Cu2O6+sigma superconductors. United States: N. p., 2008. Web.
Graf, Jeff, d', Astuto, M, Jozwiak, C, Garcia, D R, Saini, N L, Krisch, M, Ikeuchi, K, Baron, A Q.R., Eisaki, H, & Lanzara, Alessandra. Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1:6La0:4Cu2O6+sigma superconductors. United States.
Graf, Jeff, d', Astuto, M, Jozwiak, C, Garcia, D R, Saini, N L, Krisch, M, Ikeuchi, K, Baron, A Q.R., Eisaki, H, and Lanzara, Alessandra. Thu . "Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1:6La0:4Cu2O6+sigma superconductors". United States. https://www.osti.gov/servlets/purl/938787.
@article{osti_938787,
title = {Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1:6La0:4Cu2O6+sigma superconductors},
author = {Graf, Jeff and d' and Astuto, M and Jozwiak, C and Garcia, D R and Saini, N L and Krisch, M and Ikeuchi, K and Baron, A Q.R. and Eisaki, H and Lanzara, Alessandra},
abstractNote = {We report the first measurement of the Cu-O bond stretching phonon dispersion in optimally doped Bi2Sr1.6La0.4Cu2O6+delta using inelastic x-ray scattering. We found a softening of this phonon at q=(0.25,0,0) from 76 to 60 meV, similar to the one reported in other cuprates. A comparison with angle-resolved photoemission data on the same sample revealed an excellent agreement in terms of energy and momentum between the angle-resolved photoemission nodal kink and the soft part of the bond stretching phonon. Indeed, we find that the momentum space where a 63+-5 meV kink is observed can be connected with a vector q=(xi,0,0) with xi>= 0.22, corresponding exactly to the soft part of the bond stretching phonon.},
doi = {},
journal = {Physical Review Letter},
number = ,
volume = 100,
place = {United States},
year = {2008},
month = {5}
}