Electrodynamics of (Nd,Eu,Gd)Ba2Cu3Oy single crystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F11%3A00185626" target="_blank" >RIV/68407700:21340/11:00185626 - 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

Electrodynamics of (Nd,Eu,Gd)Ba2Cu3Oy single crystals

Popis výsledku v původním jazyce

We studied infrared reflectivity of two single-crystalline (Nd,Eu,Gd)Ba2Cu3Oy superconductors at temperatures from 300 to 10 K and at frequencies from 35 to 8000 cm-1. The crystals had the same nominal Nd content and differed in the Eu and Gd content. The crystal with excess of Gd exhibited much more pronounced middle-infrared band and phonon lines than the second crystal. This was consistent with significantly lower charge-carrier concentration in the crystal which led to weaker screening of the phonons and the middle-infrared band. The concentration was determined from the simple Drude model. We also performed the one-component analysis of the reflectivity. The analysis revealed that the Gd-rich crystal optical response comes from bound and free charge carriers whereas the Eu-rich crystal response originates from interacting carriers which are neither free nor bound.

Název v anglickém jazyce

Electrodynamics of (Nd,Eu,Gd)Ba2Cu3Oy single crystals

Popis výsledku anglicky

We studied infrared reflectivity of two single-crystalline (Nd,Eu,Gd)Ba2Cu3Oy superconductors at temperatures from 300 to 10 K and at frequencies from 35 to 8000 cm-1. The crystals had the same nominal Nd content and differed in the Eu and Gd content. The crystal with excess of Gd exhibited much more pronounced middle-infrared band and phonon lines than the second crystal. This was consistent with significantly lower charge-carrier concentration in the crystal which led to weaker screening of the phonons and the middle-infrared band. The concentration was determined from the simple Drude model. We also performed the one-component analysis of the reflectivity. The analysis revealed that the Gd-rich crystal optical response comes from bound and free charge carriers whereas the Eu-rich crystal response originates from interacting carriers which are neither free nor bound.

Druh

O - Ostatní výsledky

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

Kód důvěrnosti údajů

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