Emergent transverse-field Ising model in d4 spin-orbit Mott insulators

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F24%3A00139401" target="_blank" >RIV/00216224:14310/24:00139401 - isvavai.cz</a>

Výsledek na webu

<a href="https://arxiv.org/abs/2401.02532" target="_blank" >https://arxiv.org/abs/2401.02532</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.109.L020403" target="_blank" >10.1103/PhysRevB.109.L020403</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Emergent transverse-field Ising model in d4 spin-orbit Mott insulators

Popis výsledku v původním jazyce

Mott-insulating transition metal oxides containing t&lt;SUB&gt;2&lt;/SUB&gt;&lt;SUP&gt;g 4&lt;/SUP&gt; ions with strong spin-orbit coupling were recently demonstrated to display unusual magnetism due to a dynamical mixing of the low-energy multiplet states via exchange processes. Here we derive exchange interactions in the situation where a tetragonal or trigonal crystal field selects a single relevant excited state on top of the singlet ionic ground state, producing an effective spin-1/2 . We show that these moments universally obey antiferromagnetic transverse-field Ising model (TFIM) with an intrinsic transverse field generated by the splitting of the two ionic singlets. Using Ru&lt;SUP&gt;4 +&lt;/SUP&gt; as a example ion, we provide quantitative estimates of the exchange and illustrate the emergent TFIM physics based on phase diagrams and excitation spectra obtained for several 2D lattices—square, honeycomb, as well as for the frustrated triangular lattice.

Název v anglickém jazyce

Emergent transverse-field Ising model in d4 spin-orbit Mott insulators

Popis výsledku anglicky

Mott-insulating transition metal oxides containing t&lt;SUB&gt;2&lt;/SUB&gt;&lt;SUP&gt;g 4&lt;/SUP&gt; ions with strong spin-orbit coupling were recently demonstrated to display unusual magnetism due to a dynamical mixing of the low-energy multiplet states via exchange processes. Here we derive exchange interactions in the situation where a tetragonal or trigonal crystal field selects a single relevant excited state on top of the singlet ionic ground state, producing an effective spin-1/2 . We show that these moments universally obey antiferromagnetic transverse-field Ising model (TFIM) with an intrinsic transverse field generated by the splitting of the two ionic singlets. Using Ru&lt;SUP&gt;4 +&lt;/SUP&gt; as a example ion, we provide quantitative estimates of the exchange and illustrate the emergent TFIM physics based on phase diagrams and excitation spectra obtained for several 2D lattices—square, honeycomb, as well as for the frustrated triangular lattice.

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/GA22-28797S" target="_blank" >GA22-28797S: Pohybliví nositelé náboje v exotických magnetech se spin-orbitálním propletením</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

109

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

1-6

Kód UT WoS článku

001174203100011

EID výsledku v databázi Scopus

2-s2.0-85184151231