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@article{1506642,
author = {Mallett, BPP. and Maršík, Přemysl and Munzar, Dominik and Bernhard, Christian and Dubroka, Adam},
article_location = {College PK},
article_number = {5},
doi = {http://dx.doi.org/10.1103/PhysRevB.99.054513},
keywords = {high temperature superconductors cuprates; far infrared response; phonon anomalies; c-axis},
language = {eng},
issn = {2469-9950},
journal = {Physical Review B},
title = {Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors},
url = {http://dx.doi.org/10.1103/PhysRevB.99.054513},
volume = {99},
year = {2019}
}
TY - JOUR
ID - 1506642
AU - Mallett, BPP. - Maršík, Přemysl - Munzar, Dominik - Bernhard, Christian - Dubroka, Adam
PY - 2019
TI - Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors
JF - Physical Review B
VL - 99
IS - 5
SP - "054513-1"-"054513-11"
EP - "054513-1"-"054513-11"
PB - The American Physical Society
SN - 24699950
KW - high temperature superconductors cuprates
KW - far infrared response
KW - phonon anomalies
KW - c-axis
UR - http://dx.doi.org/10.1103/PhysRevB.99.054513
L2 - http://dx.doi.org/10.1103/PhysRevB.99.054513
N2 - We report on results of our analysis of the c-axis infrared conductivity,sigma(c )(omega), of bilayer LnBa(2)Cu(3)O(7-delta) (Ln=La, Nd, Y) and trilayer Bi2Sr2Ca2Cu3O10+delta high-T-c superconductors. The analysis employs the multilayer model involving the conductivity of the bilayer or trilayer unit, sigma(bl) (omega), and that of the spacing layers separating the latter units, sigma(int) (omega). For the YBa2Cu3O7-delta sample with concentration of holes p = 0.09, our fitting of the data strongly suggests that at low temperatures, the conductivity sigma(bl)(omega) possesses a pronounced and narrow Drude peak. For samples with p >= 0.115 however, the fitting indicates that sigma(bl)(omega) is, at low temperatures, dominated by a mode at a finite energy in the range from 30 to 60 meV. The properties of this resonance are in accord with those of a collective mode that appears in the spectra of sigma(bl)(omega) calculated using a microscopic gauge-invariant theory of sigma(c)(omega) by J. Chaloupka and coworkers [Phys. Rev. B 79, 184513 (2009)]. The frequency and spectral weight of the latter mode are determined by the magnitude of the splitting between the bonding and the antibonding band of the bilayer or trilayer unit. Our results, in conjunction with the microscopic theory, thus demonstrate that in moderately underdoped bilayer and trilayer high-T-c cuprates the bilayer (or trilayer) splitting is already developed. The observed doping dependence is consistent with results from angular resolved photoemission spectroscopy.
ER -
MALLETT, BPP., Přemysl MARŠÍK, Dominik MUNZAR, Christian BERNHARD a Adam DUBROKA. Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors. \textit{Physical Review B}. College PK: The American Physical Society, 2019, roč.~99, č.~5, s.~''054513-1''-''054513-11'', 11 s. ISSN~2469-9950. Dostupné z: https://dx.doi.org/10.1103/PhysRevB.99.054513.
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