Kagome metal KV<sub>3</sub>Sb<sub>5</sub>: an excellent material for surface plasmon and plasmon-mediated hot carrier applications in the infrared region

He, Weihua; Ma, Xiangchao; Jiang, Jiali; Wu, Xin; Zhang, Jianqi

doi:10.1039/d2tc03942g

Cited by 2 publications

(2 citation statements)

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“…5b , is likely to maintain a positive trend at higher frequencies, extending beyond our current detection range while remains negative below the plasma frequency of about , indicating a much broader spectrum range of hyperbolicity in CsV 3 Sb 5 . We anticipate similar effects in the closely related compounds such as KV 3 Sb 5 56 and other Kagome metals, and envision that electronic correlations and dimensional confinement in these compounds may open up new avenues for engineering the properties of plasmon polaritons in the technologically important mid-IR to far-IR frequency range.…”

Section: Discussionmentioning

confidence: 79%

Plasmons in the Kagome metal CsV3Sb5

Shiravi,

Gupta,

Ortiz

et al. 2024

Nat Commun

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Plasmon polaritons, or plasmons, are coupled oscillations of electrons and electromagnetic fields that can confine the latter into deeply subwavelength scales, enabling novel polaritonic devices. While plasmons have been extensively studied in normal metals or semimetals, they remain largely unexplored in correlated materials. In this paper, we report infrared (IR) nano-imaging of thin flakes of CsV3Sb5, a prototypical layered Kagome metal. We observe propagating plasmon waves in real-space with wavelengths tunable by the flake thickness. From their frequency-momentum dispersion, we infer the out-of-plane dielectric function $${{{{{{\boldsymbol{\epsilon }}}}}}}_{{{{{{\boldsymbol{c}}}}}}}$$ ϵ c that is generally difficult to obtain in conventional far-field optics, and elucidate signatures of electronic correlations when compared to density functional theory (DFT). We propose correlation effects might have switched the real part of $${{{{{{\boldsymbol{\epsilon }}}}}}}_{{{{{{\boldsymbol{c}}}}}}}$$ ϵ c from negative to positive values over a wide range of middle-IR frequencies, transforming the surface plasmons into hyperbolic bulk plasmons, and have dramatically suppressed their dissipation.

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Section: Discussionmentioning

confidence: 79%

Plasmons in the Kagome metal CsV3Sb5

Shiravi,

Gupta,

Ortiz

et al. 2024

Nat Commun

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“…The recently discovered kagome CsV 3 Sb 5 was reported to exhibit efficient absorption of ultraviolet radiation and has a strong reflectivity for visible light [10]. Likewise, KV 3 Sb 5 has been reported as a potential candidate for plasmon-mediated hot carrier applications in the infrared region [11]. Kagome Nb 3 Cl 8 was reported to be a semiconductor which shows large optical anisotropy [12].…”

Section: Introductionmentioning

confidence: 99%

Electronic and optical properties of ternary kagome Rb₂Ni₃S₄: a density functional study

Bahadur Acharya,

Kim,

Ghimire

2024

Modelling Simul. Mater. Sci. Eng.

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The application of semiconductors with optical properties has grown significantly in the development of semiconductor photovoltaics. Here, we explore theelectronic and optical properties of ternary transition metal sulfide Rb2Ni3S4 by means of density functional theory. From the structural perspective, Ni atoms is found to form a kagome-like lattice in a two-dimensional plane of Rb2Ni3S4. From our calculations, Rb2Ni3S4 is found to be a semiconductor with an indirect band gap of ∼0.67 eV. Strong hybridization was observed between the S-3p with the Ni-3dxz and Ni-3dyz orbitals. Interestingly, a flat band was noticed below the Fermi level demonstrating one significant feature of kagome lattice. From the optical calculations, Rb2Ni3S4 is found to exhibit optical activity in both the visible and lower ultraviolet regions of the incident photon energies. The optical response suggests this material may be a potential candidate for opto-electronic device, given its ability to interact with light across a broad range of wavelengths. This work is expected to motivate the experimental group for transport measurements and may provide a new foundation in optics.

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Kagome metal KV₃Sb₅: an excellent material for surface plasmon and plasmon-mediated hot carrier applications in the infrared region

Abstract: KV3Sb5 has attracted a lot of attention because of its superconductivity, an unconventional electronic transport property. This transport property may facilitate excellent surface plasmon (SP). Here, based on many-body first-principles...

Cited by 2 publications

References 46 publications

Plasmons in the Kagome metal CsV3Sb5

Plasmons in the Kagome metal CsV3Sb5

Electronic and optical properties of ternary kagome Rb₂Ni₃S₄: a density functional study

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Kagome metal KV3Sb5: an excellent material for surface plasmon and plasmon-mediated hot carrier applications in the infrared region

Abstract: KV3Sb5 has attracted a lot of attention because of its superconductivity, an unconventional electronic transport property. This transport property may facilitate excellent surface plasmon (SP). Here, based on many-body first-principles...

Cited by 2 publications

References 46 publications

Plasmons in the Kagome metal CsV3Sb5

Plasmons in the Kagome metal CsV3Sb5

Electronic and optical properties of ternary kagome Rb2Ni3S4: a density functional study

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Product

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Kagome metal KV₃Sb₅: an excellent material for surface plasmon and plasmon-mediated hot carrier applications in the infrared region

Electronic and optical properties of ternary kagome Rb₂Ni₃S₄: a density functional study