| GEFFROY, Dominique, Jiří CHALOUPKA, Thomas DAHM and Dominik MUNZAR. Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T-c cuprate superconductors. Physical Review B. College PK: AMER PHYSICAL SOC, 2016, vol. 93, No 14, p. "nestrankovano", 11 pp. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.93.144501. |
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@article{1373505,
author = {Geffroy, Dominique and Chaloupka, Jiří and Dahm, Thomas and Munzar, Dominik},
article_location = {College PK},
article_number = {14},
doi = {http://dx.doi.org/10.1103/PhysRevB.93.144501},
keywords = {high-temperature superconductivity; cuprates; energy dispersion; spin-fermion model},
language = {eng},
issn = {2469-9950},
journal = {Physical Review B},
title = {Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T-c cuprate superconductors},
url = {http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.144501},
volume = {93},
year = {2016}
}
TY - JOUR
ID - 1373505
AU - Geffroy, Dominique - Chaloupka, Jiří - Dahm, Thomas - Munzar, Dominik
PY - 2016
TI - Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T-c cuprate superconductors
JF - Physical Review B
VL - 93
IS - 14
SP - "nestrankovano"
EP - "nestrankovano"
PB - AMER PHYSICAL SOC
SN - 24699950
KW - high-temperature superconductivity
KW - cuprates
KW - energy dispersion
KW - spin-fermion model
UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.144501
L2 - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.144501
N2 - We investigate the electronic dispersion of the high-T-c cuprate superconductors using the fully self-consistent version of the phenomenological model, where charge planar quasiparticles are coupled to spin fluctuations. The inputs we use, the underlying (bare) band structure and the spin susceptibility chi, are extracted from fits of angle-resolved photoemission and inelastic neutron scattering data of underdoped YBa2Cu3O6.6 by T. Dahm and coworkers [Nat. Phys. 5, 217 (2009)]. Our main results are as follows: (i) We have confirmed the finding by Dahm and coworkers that the main nodal kink is, for the present values of the input parameters, determined by the upper branch of the hourglass of chi. We demonstrate that the properties of the kink depend qualitatively on the strength of the charge-spin coupling. (ii) The effect of the resonance mode of chi on the electronic dispersion strongly depends on its kurtosis in the quasimomentum space. A low (high) kurtosis implies a negligible (considerable) effect of the mode on the dispersion in the near-nodal region. (iii) The energy of the kink decreases as a function of the angle theta between the Fermi surface cut and the nodal direction, in qualitative agreement with recent experimental observations. We clarify the trend and make a specific prediction concerning the angular dependence of the kink energy in underdoped YBa2Cu3O6.6.
ER -
GEFFROY, Dominique, Jiří CHALOUPKA, Thomas DAHM and Dominik MUNZAR. Role of the upper branch of the hour-glass magnetic spectrum in the formation of the main kink in the electronic dispersion of high-T-c cuprate superconductors. \textit{Physical Review B}. College PK: AMER PHYSICAL SOC, 2016, vol.~93, No~14, p.~''nestrankovano'', 11 pp. ISSN~2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.93.144501.
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