Effects of grain boundaries on THz conductivity in the crystalline states of Ge2Sb2Te5 phase-change materials: correlation with DC loss

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00553761" target="_blank" >RIV/68378271:_____/21:00553761 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/pssr.202000411" target="_blank" >https://doi.org/10.1002/pssr.202000411</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pssr.202000411" target="_blank" >10.1002/pssr.202000411</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of grain boundaries on THz conductivity in the crystalline states of Ge2Sb2Te5 phase-change materials: correlation with DC loss

Popis výsledku v původním jazyce

Herein, in situ temperature-dependent THz and DC conductivity measurements in the crystalline states of Ge2Sb2Te5 (GST225) are performed at relatively high temperatures (>300 K). As observed in many nanomaterials, a non-Drude type of THz conductivity is found in the crystalline state of phase-change (PC) materials. Both the intra- and intergrain effects can be separated in the THz and DC conductivity. It is shown that grain boundaries significantly affect the THz and DC conductivities of the crystalline phase (distorted rock salt structure). The experimentally observed DC Hall mobility is different from the intragrain mobility extracted from the THz conductivity, suggesting that a series sequence of intra- and intergrain transport mechanisms controls the electronic transport in the crystalline state of GST225.

Název v anglickém jazyce

Effects of grain boundaries on THz conductivity in the crystalline states of Ge2Sb2Te5 phase-change materials: correlation with DC loss

Popis výsledku anglicky

Herein, in situ temperature-dependent THz and DC conductivity measurements in the crystalline states of Ge2Sb2Te5 (GST225) are performed at relatively high temperatures (>300 K). As observed in many nanomaterials, a non-Drude type of THz conductivity is found in the crystalline state of phase-change (PC) materials. Both the intra- and intergrain effects can be separated in the THz and DC conductivity. It is shown that grain boundaries significantly affect the THz and DC conductivities of the crystalline phase (distorted rock salt structure). The experimentally observed DC Hall mobility is different from the intragrain mobility extracted from the THz conductivity, suggesting that a series sequence of intra- and intergrain transport mechanisms controls the electronic transport in the crystalline state of GST225.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Physica Status Solidi

ISSN

1862-6254

e-ISSN

1862-6270

Svazek periodika

15

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

5

Strana od-do

2000411

Kód UT WoS článku

000577423100001

EID výsledku v databázi Scopus

2-s2.0-85092402145