Electric and optical properties modulations of armchair silicene nanoribbons by transverse electric fields

Lu, Dao-Bang; Song, Yiyun; Huang, Xiaoyu

doi:10.1016/j.cap.2018.11.001

Cited by 11 publications

(3 citation statements)

References 27 publications

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“…Figures 3(a [53]. The most significant difference of ε 2 (ω) when doped with Cr is the great enhanced absorption peak A in E//X of spin-up channel, whose intensity depends on the ratio of the width of silicene and silicane dimer lines in SSSLs.…”

Section: Resultsmentioning

confidence: 99%

Enhanced and spin-dependent infrared optical response of silicene/silicane superlattices with Cr adsorption

Deng¹,

Li²,

Tang³

et al. 2021

J. Phys. D: Appl. Phys.

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The electronic, magnetic and optical properties of silicene/silicane superlattices with Cr adsorption (Cr-SSSLs) are investigated via first-principles density functional calculations. The results show that all Cr-SSSLs are spin-polarized due to the defective states near the Fermi level induced by Cr and their band gaps oscillate with the width of the armchair dimer lines of the silicene segment. The total magnetic moments are dependent on the interaction between Cr and silicene, which are 2.0 and 4.0 µ B /cell for embedded and non-embedded adsorptions, respectively. In particular, the optical absorption in the infrared range is greatly enhanced by Cr adsorption, resulting in a strong spin-dependent absorption peak at 0.1 ∼ 0.3 eV. Our study shows that the electronic and optical properties of armchair SSSLs can be modulated by Cr-adsorption, which makes them an attractive candidate for spin-optoelectronic devices.

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Section: Resultsmentioning

confidence: 99%

Enhanced and spin-dependent infrared optical response of silicene/silicane superlattices with Cr adsorption

Deng¹,

Li²,

Tang³

et al. 2021

J. Phys. D: Appl. Phys.

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“…Especially for structures with widths of 3, 4, 13, 16 atoms, the band gap width decreases rapidly to 0. The optical properties of SiNRs are also thoroughly studied [29][30][31][32][33][34][35][36]. Studies on the optical properties of armchair SiNRs have shown that all studied configurations are semiconductors with a direct band gap suitable for infrared optical applications [32].…”

Section: Introductionmentioning

confidence: 99%

Electrical and optical properties of C, Ge-doped armchair silicene nanoribbons applied in optoelectronics

Ngoc

Thuy

2023

J. Phys.: Condens. Matter

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With the continuous development of nanotechnology, the search for new material structures plays a crucial role. Silicene nanoribbons are one-dimensional materials that hold promise for numerous potential applications in the future. The electric and optical properties of C, Ge-doped armchair silicene nanoribbons are investigated in this study using Density Functional Theory (DFT). All the doped configurations are stable and maintain the honeycomb hexagonal structure after optimization. Doping with C yields flatter structures, while doping with Ge yields larger buckling heights. The C 1-1 doping configuration is highlighted because its band gap is extended up to 2.35 eV, making it an ideal candidate for potential optoelectronic applications. The charge distribution, charge density difference, and hybridization of multiple orbitals are also systematically studied. The optical properties reveal the differences between C and Ge doping, with a clear anisotropy observed. Strong absorption occurs at high electromagnetic wave energies,, while the absorption coefficient rapidly decreases in the long-wavelength range. The study of electron-hole density shows good agreement with the energy band structure, where electron-hole pairs only exist when the excitation energy is greater than the bandgap width, and not all excitation energy values give rise to electron-hole pairs. This study contributes a small part to creating potential applications in nanotechnology.

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“…Also in [35] have been worked on the optical properties of silicene nanoribbons and the effect of an external field on them. Other articles have investigated the optical properties of silicene [36][37][38][39]. In this paper, we explore the optical properties of silicene such as optical conductivity and refractive index under the influence of environmental factors such as temperature, Fermi level, EF, and perpendicular external electric field, Ez to it.…”

Section: Introductionmentioning

confidence: 99%

Outstanding Tunable Electrical And Optical Characteristics In Monolayer Silicene At high Terahertz Frequencies

Nejad

Mir

Farmani

et al. 2021

Preprint

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Silicene, a zero-gap semi-metallic advanced material, has received much attention due to its extraordinary electronic and optical characteristics, which could be used in plasmonics nano-devices. This material presenting as a tunable material without degrading its high carrier mobility. By applying the rigorous numerical techniques, the optical and electrical properties of silicene at high terahertz frequencies are calculated here. Beneath the inﬂuence of environmental effects such as the Fermi level, temperature, and external electric field, on the optical conductivity and refractive index of silicene are investigated using the tight-binding model. The effect of Fermi level from zero to 1 eV, external electric field from zero to 2.5 eV, and temperature from 5 to 400 K are investigated on the optical properties of silicene. One of the interesting features of Silicene is its adjustable bandgap, which we are present here.

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Electric and optical properties modulations of armchair silicene nanoribbons by transverse electric fields

Cited by 11 publications

References 27 publications

Enhanced and spin-dependent infrared optical response of silicene/silicane superlattices with Cr adsorption

Enhanced and spin-dependent infrared optical response of silicene/silicane superlattices with Cr adsorption

Electrical and optical properties of C, Ge-doped armchair silicene nanoribbons applied in optoelectronics

Outstanding Tunable Electrical And Optical Characteristics In Monolayer Silicene At high Terahertz Frequencies

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