Atomically resolved spectroscopic study of Sr2IrO4: Experiment and theory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00399018" target="_blank" >RIV/68378271:_____/13:00399018 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1038/srep03073" target="_blank" >http://dx.doi.org/10.1038/srep03073</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/srep03073" target="_blank" >10.1038/srep03073</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Atomically resolved spectroscopic study of Sr2IrO4: Experiment and theory

Popis výsledku v původním jazyce

In Sr2IrO4, the interplay between spin-orbit coupling, bandwidth and on-site Coulomb repulsion stabilizes a Jeff=1/2 spin-orbital entangled insulating state at low temperatures. Whether this insulating phase is Mott- or Slater-type, has been under intense debate. We address this issue via spatially resolved imaging and spectroscopic studies of the Sr2IrO4 surface using scanning tunneling microscopy/ spectroscopy. STS results show opening of an gap (150,250 meV) below the Ne´el temperature, in qualitative agreement with our density-functional theory calculations. More importantly, the temperature dependence of the gap is consistent with our dynamical mean field theory results, both showing a continuous transition from a gapped insulating ground state toa non-gap phase as temperatures approach TN. These results indicate a significant Slater character of gap formation, thus suggesting that Sr2IrO4 is a uniquely correlated system, where Slaterand Mott-Hubbard-type behaviors coexist.

Název v anglickém jazyce

Atomically resolved spectroscopic study of Sr2IrO4: Experiment and theory

Popis výsledku anglicky

In Sr2IrO4, the interplay between spin-orbit coupling, bandwidth and on-site Coulomb repulsion stabilizes a Jeff=1/2 spin-orbital entangled insulating state at low temperatures. Whether this insulating phase is Mott- or Slater-type, has been under intense debate. We address this issue via spatially resolved imaging and spectroscopic studies of the Sr2IrO4 surface using scanning tunneling microscopy/ spectroscopy. STS results show opening of an gap (150,250 meV) below the Ne´el temperature, in qualitative agreement with our density-functional theory calculations. More importantly, the temperature dependence of the gap is consistent with our dynamical mean field theory results, both showing a continuous transition from a gapped insulating ground state toa non-gap phase as temperatures approach TN. These results indicate a significant Slater character of gap formation, thus suggesting that Sr2IrO4 is a uniquely correlated system, where Slaterand Mott-Hubbard-type behaviors coexist.

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

<a href="/cs/project/GA13-25251S" target="_blank" >GA13-25251S: Silné elektronové korelace v systémech se spin-orbitální vazbou</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

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Svazek periodika

3

Číslo periodika v rámci svazku

OCT

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000326331200001

EID výsledku v databázi Scopus

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