Two-dimensional Jeff=1/2 antiferromagnetic insulator unraveled from interlayer exchange coupling in artificial perovskite iridate superlattices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00484697" target="_blank" >RIV/68378271:_____/17:00484697 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10363558

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevLett.119.027204" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.119.027204</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.119.027204" target="_blank" >10.1103/PhysRevLett.119.027204</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Two-dimensional Jeff=1/2 antiferromagnetic insulator unraveled from interlayer exchange coupling in artificial perovskite iridate superlattices

Popis výsledku v původním jazyce

We report an experimental investigation of the two-dimensional Jeff ¼ 1=2 antiferromagnetic Mott insulator by varying the interlayer exchange coupling in [ðSrIrO3 Þ 1, ðSrTiO3 Þ m] (m ¼ 1, 2 and 3) superlattices. Although all samples exhibited an insulating ground state with long-range magnetic order, temperature-dependent resistivity measurements showed a stronger insulating behavior in the m ¼ 2 and m ¼ 3 samples than the m ¼ 1 sample which displayed a clear kink at the magnetic transition. This difference indicates that the blocking effect of the excessive SrTiO3 layer enhances the effective electronelectron correlation and strengthens the Mott phase. The significant reduction of the Néel temperature from 150 K for m ¼ 1 to 40 K for m ¼ 2 demonstrates that the long-range order stability in the former is boosted by a substantial interlayer exchange coupling.

Název v anglickém jazyce

Two-dimensional Jeff=1/2 antiferromagnetic insulator unraveled from interlayer exchange coupling in artificial perovskite iridate superlattices

Popis výsledku anglicky

We report an experimental investigation of the two-dimensional Jeff ¼ 1=2 antiferromagnetic Mott insulator by varying the interlayer exchange coupling in [ðSrIrO3 Þ 1, ðSrTiO3 Þ m] (m ¼ 1, 2 and 3) superlattices. Although all samples exhibited an insulating ground state with long-range magnetic order, temperature-dependent resistivity measurements showed a stronger insulating behavior in the m ¼ 2 and m ¼ 3 samples than the m ¼ 1 sample which displayed a clear kink at the magnetic transition. This difference indicates that the blocking effect of the excessive SrTiO3 layer enhances the effective electronelectron correlation and strengthens the Mott phase. The significant reduction of the Néel temperature from 150 K for m ¼ 1 to 40 K for m ¼ 2 demonstrates that the long-range order stability in the former is boosted by a substantial interlayer exchange coupling.

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

2017

Kód důvěrnosti údajů

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

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

—

Svazek periodika

119

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

000405514700017

EID výsledku v databázi Scopus

2-s2.0-85024477953