Giant magnetic response of a two-dimensional antiferromagnet

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10379324" target="_blank" >RIV/00216208:11320/18:10379324 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00497895

Výsledek na webu

<a href="https://doi.org/10.1038/s41567-018-0152-6" target="_blank" >https://doi.org/10.1038/s41567-018-0152-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41567-018-0152-6" target="_blank" >10.1038/s41567-018-0152-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Giant magnetic response of a two-dimensional antiferromagnet

Popis výsledku v původním jazyce

A fundamental difference between antiferromagnets and ferromagnets is the lack of linear coupling to a uniform magnetic field due to the staggered order parameter(1). Such coupling is possible via the Dzyaloshinskii-Moriya (DM) interaction(2,3), but at the expense of reduced antiferromagnetic (AFM) susceptibility due to the canting-induced spin anisotropy(4). We solve this long-standing problem with a top-down approach that utilizes spin-orbit coupling in the presence of a hidden SU(2) symmetry. We demonstrate giant AFM responses to sub-tesla external fields by exploiting the extremely strong two-dimensional critical fluctuations preserved under a symmetry-invariant exchange anisotropy, which is built into a square lattice artificially synthesized as a superlattice of SrIrO3 and SrTiO3. The observed field-induced logarithmic increase of the ordering temperature enables highly efficient control of the AFM order. Our results demonstrate that symmetry can be exploited in spin-orbit-coupled magnets to develop functional AFM materials for fast and secured spintronic devices(5-9).

Název v anglickém jazyce

Giant magnetic response of a two-dimensional antiferromagnet

Popis výsledku anglicky

A fundamental difference between antiferromagnets and ferromagnets is the lack of linear coupling to a uniform magnetic field due to the staggered order parameter(1). Such coupling is possible via the Dzyaloshinskii-Moriya (DM) interaction(2,3), but at the expense of reduced antiferromagnetic (AFM) susceptibility due to the canting-induced spin anisotropy(4). We solve this long-standing problem with a top-down approach that utilizes spin-orbit coupling in the presence of a hidden SU(2) symmetry. We demonstrate giant AFM responses to sub-tesla external fields by exploiting the extremely strong two-dimensional critical fluctuations preserved under a symmetry-invariant exchange anisotropy, which is built into a square lattice artificially synthesized as a superlattice of SrIrO3 and SrTiO3. The observed field-induced logarithmic increase of the ordering temperature enables highly efficient control of the AFM order. Our results demonstrate that symmetry can be exploited in spin-orbit-coupled magnets to develop functional AFM materials for fast and secured spintronic devices(5-9).

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

2018

Kód důvěrnosti údajů

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

Název periodika

Nature Physics

ISSN

1745-2473

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

806-810

Kód UT WoS článku

000440583300013

EID výsledku v databázi Scopus

2-s2.0-85048021920