A first-principles study of strain tuned optical properties in monolayer tellurium

Wang, Jinjin; Guo, Yanhui; Shen, Hong; Chen, Yu Yo; Zhang, Rongjun; Zheng, Yu‐Xiang; Chen, Liang‐Yao; Wang, Song-You; Jia, Yu; Chen, Hong Yi; Su, Wan-Sheng

doi:10.1039/c9ra08515g

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…By studying ambipolar tellurene based FETs, Berweger demonstrated the general ability of near-field scanning microwave microscopy to image and study the local carrier type and relevant conductivity by operando [99] . It was revealed that the global minimum of device conductivity relying on transport measurements results from the continued coexistence of p-type regions at the device edge and n-type regions in the interior of their micrometer-scale devices.…”

Section: Optical Propertiesmentioning

confidence: 99%

Tellurene: An elemental 2D monolayer material beyond its bulk phases without van der Waals layered structures

et al. 2020

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Due to the quantum confinement effect, atomically thin two-dimensional (2D) monolayer materials possess distinct characteristics from their corresponding bulk materials, which have received wide attention from science and industry. Among all the 2D materials, elemental 2D materials with the simplest components are most striking. As an emerging group-VIA elemental 2D monolayer material, tellurene exhibits many exciting fundamental properties, such as chemical and mechanical stabilities, bandgap and high carrier mobilities compared to phosphorene, graphene and MoS2, respectively. Besides, in further exploration, it was found that tellurene or tellurene-based device presents excellent thermoelectric properties, piezoelectric properties, quantum Hall effects, and superb optical properties especially nonlinear optics characteristics, etc. The properties of tellurene can be modulated by virtue of strain, defects, edges, and heterojunction effects. In view of so many unique properties, it has drawn significant interest since tellurene was predicted and fabricated successfully in 2017. In this paper, we review the 2D tellurene allotropes, experimental preparation, excellent properties, performance modulation and future development.

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Section: Optical Propertiesmentioning

confidence: 99%

Tellurene: An elemental 2D monolayer material beyond its bulk phases without van der Waals layered structures

et al. 2020

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“…ε z , exhibits different properties from that along the x and y directions. Compared with monolayer Te, the static dielectric constant ε 1 (0) of the armchair (5, 5) NT along three directions is larger than that of monolayer Te [39], and the ε 1 (0) of armchair (5, 5) NT along the z direction is greater than that along the x and y directions. The imaginary part of the dielectric constant, ε 2 , reflects the absorption properties of the material, where the peaks of ε 2x and ε 2y are found at 1.6 eV, and the peak of ε 2z is near 0.9 eV.…”

Section: Resultsmentioning

confidence: 85%

A first-principles study of structural, electronic and optical properties of α-Te tubular nanostructures modulated by uniaxial strain

et al. 2022

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First-principles calculations were performed to study the effect of uniaxial strain on the electronic properties of α-Te nanotubes (NTs) of different configurations and tube sizes. Our ab initio molecular dynamics simulation and phonon dispersion calculation indicate that both armchair (5, 5) and zigzag (10, 0) α-Te NTs are thermodynamically stable and exhibit good dynamic stability at room temperature. Under compressive and tensile strains of ±10%, the atomic structure of the α-Te NTs remains stable, demonstrating they have good flexibility. An increase in uniaxial strain leads to a progressive decrease in the band gap for both armchair and zigzag α-Te NTs. Interestingly, it is found that armchair (5,5) α-Te NTs experience an intriguing semiconductor–metal transition at a critical strain, while other α-Te NTs are semiconducting with an adjustable band gap. In addition, the valence band maximum and conduction band minimum charge density between the interlayers has an impact on the type of band gap in the (5, 5) and (10, 0) NTs. Finally, we found the optical properties can be significantly modulated under strain in the z direction. Increasing our understanding of the electronic and optical properties of α-Te NTs under strain modulation helps shed light on the properties of new nanomaterials more generally, paving the way for future optoelectronic applications. These findings highlight the tunable electronic and optical properties of α-Te nanotubes, which is promising for applications in nanodevices such as opto-electronics, electrical switches, and nanoscale strain sensors.

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“…Similar to BP, the bandgap and optical property of Te can also be tuned through changes in the layer thickness [107,140,141], the mechanical strain [43,108,[142][143][144], the charge doping [145], and the external electrical field [146]. Te shows a thickness-dependent bandgap evolution with an indirect bandgap of 0.35 eV in the bulk and a direct bandgap of 1.04 eV in its monolayer form [107].…”

Section: Tellurenementioning

confidence: 99%

Emerging low-dimensional materials for mid-infrared detection

Wang

Yan

et al. 2020

Nano Res.

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Mid-infrared (IR) detectors based on the emerging low-dimensional (two-dimensional and quasi one-dimensional) materials offer unique characteristics including large bandgap tunability, optical polarization sensitivity and integrability with typical silicon process, which are not available in the mid-IR detectors based on traditional compound semiconductors. Here, we review the recent progress in study of mid-IR detectors based on the low-dimensional materials, including black phosphorus, black arsenic phosphorus, tellurene and BaTiS 3 , from the perspectives of crystal structure, material synthesis, optical properties, and the detector characteristics. The detector gain and detectivity are benchmarked, and the unique properties, such as the polarization sensitivity, are discussed. We also provide our perspective about key future research directions in this field.

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A first-principles study of strain tuned optical properties in monolayer tellurium

Abstract: We have theoretically investigated the tunable optical properties of monolayer tellurium under biaxial strain and materials with better performance can be obtained with the application of strain.

Cited by 6 publications

References 33 publications

Tellurene: An elemental 2D monolayer material beyond its bulk phases without van der Waals layered structures

Tellurene: An elemental 2D monolayer material beyond its bulk phases without van der Waals layered structures

A first-principles study of structural, electronic and optical properties of α-Te tubular nanostructures modulated by uniaxial strain

Emerging low-dimensional materials for mid-infrared detection

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