Charge‐Density Wave Driven Giant Thermionic‐Current Switching in 1T‐TaS2/2H‐TaSe2/2H‐MoS2 Heterostructure

Mahajan, Mehak; Majumdar, Kausik

doi:10.1002/aelm.202200866

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…To enhance the electromagnetic properties and increase the versatility of materials, the integration of metamaterials with active elements such as semiconductors [13][14][15], phase change materials [16,17], and twodimensional (2D) substances [18][19][20] has been explored by researchers. Graphene, a novel 2D material, which is composed of a hexagonal lattice of carbon atoms resembling a honeycomb structure [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional terahertz device based on plasmon-induced transparency

Lei,

Nie,

et al. 2024

Phys. Scr.

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Enhancing light-matter interaction is crucial in optics for boosting nanophotonic device performance, which can be achieved via plasmon-induced transparency (PIT). In this study, a polarization-insensitive PIT effect at terahertz frequencies is achieved using a novel metasurface composed of a cross-shaped graphene structure surrounded by four graphene strips. The high symmetry of this metasurface ensures its insensitivity to changes in the polarization angle of incident light. The PIT effect, stemming from the coupling of graphene bright modes, was explored through finite difference time domain (FDTD) simulations and coupled mode theory (CMT) analysis. By tuning the Fermi level in graphene, we effectively modulated the PIT transparent window, achieving high-performance optical switching with a modulation depth (88.9% < MD < 98.0%) and insertion losses (0.17 dB < IL < 0.51 dB) at a carrier mobility of 2 m2/(V·s). Furthermore, the impact of graphene carrier mobility on the slow-light effect was examined, revealing that increasing the carrier mobility from 0.5 m2/(V·s) to 3 m2/(V·s) boosts the group index from 126 to 781. These findings highlight the potential for developing versatile terahertz devices, such as optical switches and slow-light apparatus.

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Section: Introductionmentioning

confidence: 99%

Multifunctional terahertz device based on plasmon-induced transparency

Lei,

Nie,

et al. 2024

Phys. Scr.

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Improved structural calculations of bulk and monolayer TaX2 (X = S, Se) using DFT-D, and comparison of their electronic and elastic properties

Mansouri,

Ghalambor Dezfuli,

Salehi

2025

Solid State Communications

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Probing enhanced superconductivity in van der Waals polytypes of VxTaS2

Pudelko,

Liu,

Petocchi

et al. 2024

Phys. Rev. Materials

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Layered transition metal dichalcogenides (TMDs) stabilize in multiple structural forms with profoundly distinct and exotic electronic phases. Interfacing different layer types is a promising route to manipulate TMDs' properties, not only as a means to engineer quantum devices but also as a route to explore fundamental physics in complex matter. Here we use angle-resolved photoemission (ARPES) to investigate a strong layering-dependent enhancement of superconductivity in TaS2, in which the superconducting transition temperature, Tc, of its 2H structural phase is nearly tripled when insulating 1T layers are inserted into the system. The study is facilitated by a vanadium-intercalation approach to synthesizing various TaS2 polytypes, which improves the quality of the ARPES data while leaving key aspects of the electronic structure and properties intact. The spectra show the clear opening of the charge density wave gap in the pure 2H phase and its suppression when 1T layers are introduced to the system. Moreover, in the mixed-layer 4Hb system, we observe a strongly momentum-anisotropic increase in electron-phonon coupling near the Fermi level relative to the 2H phase. Both phenomena help to account for the increased Tc in mixed 2H/1T layer structures. Published by the American Physical Society 2024

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Charge‐Density Wave Driven Giant Thermionic‐Current Switching in 1T‐TaS₂/2H‐TaSe₂/2H‐MoS₂ Heterostructure

Cited by 3 publications

References 25 publications

Multifunctional terahertz device based on plasmon-induced transparency

Multifunctional terahertz device based on plasmon-induced transparency

Improved structural calculations of bulk and monolayer TaX2 (X = S, Se) using DFT-D, and comparison of their electronic and elastic properties

Probing enhanced superconductivity in van der Waals polytypes of VxTaS2

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