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

J 2024

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

CHALOUPKA, Jiří

Basic information

Original name

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

Authors

CHALOUPKA, Jiří (203 Czech Republic, guarantor, belonging to the institution)

Edition

Physical Review B, College PK, American Physical Society, 2024, 2469-9950

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10302 Condensed matter physics

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL URL

Impact factor

Impact factor: 3.700 in 2022

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1103/PhysRevB.109.L020403

UT WoS

001174203100011

Keywords in English

Mott insulators; Linear spin wave theory; Exchange interaction; Frustrated magnetism; Magnetic order; Quantum phase transitions; Spin dynamics

Abstract

V originále

Mott-insulating transition metal oxides containing t2g 4 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 Ru4 + 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.

Links

GA22-28797S, research and development project

Name: Pohybliví nositelé náboje v exotických magnetech se spin-orbitálním propletením

Investor: Czech Science Foundation

Citovat

CHALOUPKA, Jiří. Emergent transverse-field Ising model in d4 spin-orbit Mott insulators. Physical Review B. College PK: American Physical Society, 2024, vol. 109, No 2, p. 1-6. ISSN 2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.109.L020403.

@article{2393299,
   author = {Chaloupka, Jiří},
   article_location = {College PK},
   article_number = {2},
   doi = {http://dx.doi.org/10.1103/PhysRevB.109.L020403},
   keywords = {Mott insulators; Linear spin wave theory; Exchange interaction; Frustrated magnetism; Magnetic order; Quantum phase transitions; Spin dynamics},
   language = {eng},
   issn = {2469-9950},
   journal = {Physical Review B},
   title = {Emergent transverse-field Ising model in d4 spin-orbit Mott insulators},
   url = {https://arxiv.org/abs/2401.02532},
   volume = {109},
   year = {2024}
}

TY - JOUR
ID - 2393299
AU - Chaloupka, Jiří
PY - 2024
TI - Emergent transverse-field Ising model in d4 spin-orbit Mott insulators
JF - Physical Review B
VL - 109
IS - 2
SP - 1-6
EP - 1-6
PB - American Physical Society
SN - 24699950
KW - Mott insulators
KW - Linear spin wave theory
KW - Exchange interaction
KW - Frustrated magnetism
KW - Magnetic order
KW - Quantum phase transitions
KW - Spin dynamics
UR - https://arxiv.org/abs/2401.02532
N2 - Mott-insulating transition metal oxides containing t2g 4 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 Ru4 + 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.
ER -

CHALOUPKA, Jiří. Emergent transverse-field Ising model in d4 spin-orbit Mott insulators. \textit{Physical Review B}. College PK: American Physical Society, 2024, vol.~109, No~2, p.~1-6. ISSN~2469-9950. Available from: https://dx.doi.org/10.1103/PhysRevB.109.L020403.

Detailed Information on Publication Record