Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F19%3A00109307" target="_blank" >RIV/00216224:14310/19:00109307 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.99.054513" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.99.054513</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.99.054513" target="_blank" >10.1103/PhysRevB.99.054513</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors

Popis výsledku v původním jazyce

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 &gt;= 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.

Název v anglickém jazyce

Signatures of the bonding-antibonding splitting in the c-axis infrared response of moderately underdoped bilayer and trilayer cuprate superconductors

Popis výsledku anglicky

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 &gt;= 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

99

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

„054513-1“-„054513-11“

Kód UT WoS článku

000459576600001

EID výsledku v databázi Scopus

2-s2.0-85062523098