Gate-tunable renormalization of spin-correlated flat-band states and bandgap in a 2D magnetic insulator

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00574995" target="_blank" >RIV/68378271:_____/23:00574995 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10475858

Výsledek na webu

<a href="https://doi.org/10.1021/acsnano.3c01038" target="_blank" >https://doi.org/10.1021/acsnano.3c01038</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsnano.3c01038" target="_blank" >10.1021/acsnano.3c01038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gate-tunable renormalization of spin-correlated flat-band states and bandgap in a 2D magnetic insulator

Popis výsledku v původním jazyce

Emergent quantum phenomena in two-dimensional van der Waals (vdW) magnets are largely governed by the interplay between exchange and Coulomb interactions. The ability to precisely tune the Coulomb interaction enables the control of spin-correlated flat-band states, band gap, and unconventional magnetism in such strongly correlated materials. Here, we demonstrate a gate-tunable renormalization of spin-correlated flat-band states and bandgap in magnetic chromium tribromide (CrBr3) monolayers grown on graphene. Our gate-dependent scanning tunneling spectroscopy (STS) studies reveal that the interflat-band spacing and bandgap of CrBr3 can be continuously tuned by 120 and 240 meV, respectively, via electrostatic injection of carriers into the hybrid CrBr3/graphene system. We attribute it to the self-screening of CrBr3 arising from the gate-induced carriers injected into CrBr3, which dominates over the weakened remote screening of the graphene substrate.

Název v anglickém jazyce

Gate-tunable renormalization of spin-correlated flat-band states and bandgap in a 2D magnetic insulator

Popis výsledku anglicky

Emergent quantum phenomena in two-dimensional van der Waals (vdW) magnets are largely governed by the interplay between exchange and Coulomb interactions. The ability to precisely tune the Coulomb interaction enables the control of spin-correlated flat-band states, band gap, and unconventional magnetism in such strongly correlated materials. Here, we demonstrate a gate-tunable renormalization of spin-correlated flat-band states and bandgap in magnetic chromium tribromide (CrBr3) monolayers grown on graphene. Our gate-dependent scanning tunneling spectroscopy (STS) studies reveal that the interflat-band spacing and bandgap of CrBr3 can be continuously tuned by 120 and 240 meV, respectively, via electrostatic injection of carriers into the hybrid CrBr3/graphene system. We attribute it to the self-screening of CrBr3 arising from the gate-induced carriers injected into CrBr3, which dominates over the weakened remote screening of the graphene substrate.

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

<a href="/cs/project/GN22-18079O" target="_blank" >GN22-18079O: POLAR-PEC: Objevení (foto/elektro) katalytických vlastností povrchů polárních oxidů kovů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

ACS Nano

ISSN

1936-0851

e-ISSN

1936-086X

Svazek periodika

17

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

15441-15448

Kód UT WoS článku

001044503900001

EID výsledku v databázi Scopus

2-s2.0-85168427920