Resonant inelastic x-ray scattering in the topological semimetal FeSi DOI
Yao Shen, Anirudh Chandrasekaran, Jennifer Sears

et al.

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(24)

Published: Dec. 24, 2024

The energy spectrum of topological semimetals contains protected degeneracies in reciprocal space that correspond to Weyl, Dirac, or multifold fermionic states. To exploit the unconventional properties these states, one has access electronic structure three-dimensional bulk. In this paper, we present a joint theory-experiment study candidate semimetal with resonant inelastic x-ray scattering (RIXS). We resolve bulk states FeSi using momentum-dependent RIXS at Fe L3 edge. observe broad excitation continuum devoid sharp features, consistent particle-hole an underlying band structure. Using density functional theory (DFT), calculate and derive formulation fast collision approximation model process zero adjustable parameters. While predicts spectral features similar observed ones, discrepancies between experiment suggest presence low-energy processes DFT alone does not account for. This shows is useful tool for revealing unanticipated behavior class materials. locked icon Physics Subject Headings (PhySH)Topological materialsBand methodsResonant

Language: Английский

Time-domain study of coupled collective excitations in quantum materials DOI Creative Commons
Chenhang Xu, Alfred Zong

npj Quantum Materials, Journal Year: 2025, Volume and Issue: 10(1)

Published: Feb. 14, 2025

Language: Английский

Citations

1
Dispersive Dark Excitons in van der Waals Ferromagnet CrI3 DOI Creative Commons
Wei He, Jennifer Sears, Francesco Barantani

et al.

Physical Review X, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 25, 2025

Spin-flip dark excitons are optical-dipole-forbidden quasiparticles with remarkable potential in optoelectronics, especially when they realized within cleavable van der Waals materials. Despite this potential, have not yet been definitively identified ferromagnetic Here, we report two a model material CrI3 using high-resolution resonant inelastic x-ray scattering and show that feature narrower linewidths compared to the bright previously reported material. These shown spin-flip character, disperse as function of momentum, change through transition temperature. Given versatility materials, these hold promise for new types magneto-optical functionality. Published by American Physical Society 2025

Language: Английский

Citations

0
Magnetic excitations in Ndn+1NinO3n+1 Ruddlesden-Popper nickelates observed via resonant … DOI
Sophia F. R. TenHuisen, Grace A. Pan, Qi Song

et al.

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(16)

Published: April 22, 2025

Citations

0
Theory of Electron-Phonon Interactions in Extended Correlated Systems Probed by Resonant Inelastic X-Ray Scattering DOI Creative Commons
Jinu Thomas, Debshikha Banerjee, Alberto Nocera

et al.

Physical Review X, Journal Year: 2025, Volume and Issue: 15(2)

Published: April 25, 2025

An emerging application of resonant inelastic x-ray scattering (RIXS) is the study lattice excitations and electron-phonon (e-ph) interactions in quantum materials. Despite growing importance this area research, community lacks a complete understanding how RIXS process excites these encode information about e-ph interactions. Here, we present detailed spectra Hubbard-Holstein model defined on extended one-dimensional lattices. Using density matrix renormalization group method, compute response while treating electron mobility, many-body interactions, core-hole an equal footing. The predicted exhibit notable differences from those obtained using commonly adopted Lang-Firsov models, with important implications for analyzing past future experiments. Our results provide deeper probes e-ph set stage more realistic analysis Published by American Physical Society 2025

Language: Английский

Citations

0
Fractionalized excitations and resonant inelastic x-ray spectra in frustrated spin-1/2 trimer chains DOI

Prabhakar,

Subhajyoti Pal, Umesh Kumar

et al.

Physical review. B./Physical review. B, Journal Year: 2025, Volume and Issue: 111(20)

Published: May 5, 2025

Language: Английский

Citations

0
Resonant inelastic x-ray scattering in the topological semimetal FeSi DOI
Yao Shen, Anirudh Chandrasekaran, Jennifer Sears

et al.

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(24)

Published: Dec. 24, 2024

The energy spectrum of topological semimetals contains protected degeneracies in reciprocal space that correspond to Weyl, Dirac, or multifold fermionic states. To exploit the unconventional properties these states, one has access electronic structure three-dimensional bulk. In this paper, we present a joint theory-experiment study candidate semimetal with resonant inelastic x-ray scattering (RIXS). We resolve bulk states FeSi using momentum-dependent RIXS at Fe L3 edge. observe broad excitation continuum devoid sharp features, consistent particle-hole an underlying band structure. Using density functional theory (DFT), calculate and derive formulation fast collision approximation model process zero adjustable parameters. While predicts spectral features similar observed ones, discrepancies between experiment suggest presence low-energy processes DFT alone does not account for. This shows is useful tool for revealing unanticipated behavior class materials. locked icon Physics Subject Headings (PhySH)Topological materialsBand methodsResonant

Language: Английский

Citations

0