Magnetotransport and THz-Optical Investigations at Devices with HgTe Quantum Wells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F10%3A10051609" target="_blank" >RIV/00216208:11320/10:10051609 - 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

Magnetotransport and THz-Optical Investigations at Devices with HgTe Quantum Wells

Popis výsledku v původním jazyce

We investigated the magnetoconductivity and the Terahertz (THz) photo-conductivity of devices with HgTe quantum wells embedded in barrier layers of HgCdTe. For the photoconductivity measurements, a THz laser system (p-Ge-Laser) with tunable output in thewavelength range 120 um { lambda { 180 um was applied. The THz laser radiation is used in order to excite charge carriers over the Landau-gap. The response of the sample to the laser impulses is in 2D-samples in the quantum Hall (QH) regime measured inorder to receive data of the relaxation of the charge carriers. In this presentation we present photoconduction measurements of the HgTe-quantum well in Hall bar, Corbino as well as combined Corbino-Hall bar geometry in the QH-regime. The material systemHgTe/HgCdTe is characterized by a small effective mass compared to GaAs and accordingly smaller magnetic fields below 2 T for operation for the appropriate cyclotron energy.

Název v anglickém jazyce

Magnetotransport and THz-Optical Investigations at Devices with HgTe Quantum Wells

Popis výsledku anglicky

We investigated the magnetoconductivity and the Terahertz (THz) photo-conductivity of devices with HgTe quantum wells embedded in barrier layers of HgCdTe. For the photoconductivity measurements, a THz laser system (p-Ge-Laser) with tunable output in thewavelength range 120 um { lambda { 180 um was applied. The THz laser radiation is used in order to excite charge carriers over the Landau-gap. The response of the sample to the laser impulses is in 2D-samples in the quantum Hall (QH) regime measured inorder to receive data of the relaxation of the charge carriers. In this presentation we present photoconduction measurements of the HgTe-quantum well in Hall bar, Corbino as well as combined Corbino-Hall bar geometry in the QH-regime. The material systemHgTe/HgCdTe is characterized by a small effective mass compared to GaAs and accordingly smaller magnetic fields below 2 T for operation for the appropriate cyclotron energy.

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

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Journal of Low Temperature Physics

ISSN

0022-2291

e-ISSN

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Svazek periodika

159

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

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Kód UT WoS článku

000275415400045

EID výsledku v databázi Scopus

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