Microscopic gauge-invariant theory of the c-axis infrared response of bilayer cuprate superconductors and the origin of the superconductivity-induced absorption bands

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00035682" target="_blank" >RIV/00216224:14310/09:00035682 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microscopic gauge-invariant theory of the c-axis infrared response of bilayer cuprate superconductors and the origin of the superconductivity-induced absorption bands

Popis výsledku v původním jazyce

We report on results of our study of the c-axis infrared conductivity of bilayer high-Tc cuprate superconductors using a model involving the bilayer-split bands. An emphasis is on the gauge invariance of the theory, which turns out to be essential for the understanding of the electrodynamics of these compounds. The description of the optical response involves local intra- bilayer and interbilayer current densities and local conductivities. The local conductivities are obtained using a microscopic theory, where the quasiparticles of the two bands are coupled to spin fluctuations. The resulting response of the model is studied in detail and an interpretation of two superconductivity-induced peaks in the experimental data of the real part of the c-axis conductivity is proposed. The peak around 400 cm-1 is attributed to a collective mode of the intrabilayer regions, which is an analog of the Bogolyubov-Anderson mode. The peak around 1000 cm-1 is interpreted as a pair-breaking feature.

Název v anglickém jazyce

Microscopic gauge-invariant theory of the c-axis infrared response of bilayer cuprate superconductors and the origin of the superconductivity-induced absorption bands

Popis výsledku anglicky

We report on results of our study of the c-axis infrared conductivity of bilayer high-Tc cuprate superconductors using a model involving the bilayer-split bands. An emphasis is on the gauge invariance of the theory, which turns out to be essential for the understanding of the electrodynamics of these compounds. The description of the optical response involves local intra- bilayer and interbilayer current densities and local conductivities. The local conductivities are obtained using a microscopic theory, where the quasiparticles of the two bands are coupled to spin fluctuations. The resulting response of the model is studied in detail and an interpretation of two superconductivity-induced peaks in the experimental data of the real part of the c-axis conductivity is proposed. The peak around 400 cm-1 is attributed to a collective mode of the intrabilayer regions, which is an analog of the Bogolyubov-Anderson mode. The peak around 1000 cm-1 is interpreted as a pair-breaking feature.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

1098-0121

e-ISSN

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Svazek periodika

79

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

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Kód UT WoS článku

000266501200098

EID výsledku v databázi Scopus

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