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Enhancing the light-matter interactions in two-dimensional materials via optical metasurfaces has attracted much attention due to its potential to enable breakthrough in advanced compact photonic and quantum information devices. Here, we…

We propose the design of low strained and energetically favourable mono and bilayer graphene overlayer on anatase TiO$_2$ (001) surface and examined the electronic structure of the interface with the aid of first principle calculations. In…

Materials Science · Physics 2020-12-22 Shashi B. Mishra , Somnath C. Roy , B. R. K. Nanda

Solid solutions of perovskite oxides (KNbO3)1-x+(La2NiMnO6)x (x=0, 0.1, 0.2 and 0.3) with a variation of band gap (1.33-3.6 eV) have been introduced as a promising photovoltaic absorber. The structural characterization of the prepared…

Materials Science · Physics 2018-09-21 Md S. Sheikh , A. Dutta , T. K. Bhowmik , S. K. Ghosh , S. K. Rout , T. P. Sinha

We report a post-growth aging mechanism of Bi$_2$Te$_3$(111) films with scanning tunneling microscopy in combination with density functional theory calculation. It is found that a monolayered structure with a squared lattice symmetry…

Materials Science · Physics 2017-04-05 Zhi-Wen Wang , Wen-Kai Huang , Kai-Wen Zhang , Da-Jun Shu , Mu Wang , Shao-Chun Li

Enhancing light-matter coupling in two-dimensional (2D) semiconductors such as transition metal dichalcogenide monolayers remains a central challenge in nanophotonics due to their atomic thickness, which limits their interaction volume with…

Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties, at the length scales of the present technology. Here we…

Sapphire is a promising wideband substrate material for visible photonics. It is a common growth substrate for III-nitride light-emitting diodes and laser structures. Doped sapphires are important gain media foundational to the development…

Optics · Physics 2024-05-07 Yubo Wang , Yu Guo , Yiyu Zhou , Hao Xie , Hong X. Tang

Ultrathin lateral heterostructures of monolayer MoS2 and WS2 have successfully been realized with the metal-organic chemical vapor deposition method. Atomic-resolution HAADF-STEM observations have revealed that the junction widths of…

Two-dimensional (2D) material heterostructures have attracted considerable attention owing to their interesting and novel physical properties, which expand the possibilities for future optoelectronic, photovoltaic, and nanoelectronic…

Mesoscale and Nanoscale Physics · Physics 2023-07-27 Fan Li , Jialin Li , Junsheng Zheng , Yuanbiao Tong , Huanfeng Zhu , Pan Wang , Linjun Li

Metal halide perovskites APbX3 (A+ = FA+ (formamidinium), MA+ (methylammonium) or Cs+, X- = I-, Br-) are considered as prominent innovative components in nowadays perovskite solar cells. Crystallization of these materials is often…

We show the possibility of tailoring the molecular arrangement, as well as the chemical and structural modifications, of porphyrins at the monolayer saturation coverage on TiO2(110) by Synchrotron photoemission, electron diffraction, STM…

Perovskite photoelectrodes are being extensively studied in search for photocatalytic materials that can produce hydrogen through water splitting. The solar-to-hydrogen efficiency of these materials is critically dependent on the…

Applied Physics · Physics 2019-06-26 Yihuang Xiong , Ismaila Dabo

The application of ultrathin two-dimensional (2D) perovskites in near-infrared and visible-range optoelectronics has been limited owing to their inherent wide bandgaps, large excitonic binding energies and low optical absorption at higher…

Mesoscale and Nanoscale Physics · Physics 2022-05-06 Abin Varghese , Yuefeng Yin , Mingchao Wang , Saurabh Lodha , Nikhil V. Medhekar

The growing families of two-dimensional crystals derived from naturally occurring van der Waals materials offer an unprecedented platform to investigate elusive physical phenomena and could be of use in a diverse range of devices. Of…

Effective integration of 2D materials such as monolayer transition metal dichalcogenides (TMDs) into photonic waveguides and integrated circuits is being intensely pursued due to the materials' strong exciton-based optical response. Here,…

Very recently, the two-dimensional (2D) form of MoSi2N4 has been successfully fabricated [Hong et al., Sci. 369, 670 (2020)]. Motivated by theses recent experimental results, herein we investigate the structural, mechanical, thermal,…

Materials Science · Physics 2021-05-24 A. Bafekry , M. Faraji , Do M. Hoat , M. M. Fadlallah , M. Shahrokhi , F. Shojaei , D. Gogova , M. Ghergherehchi

We have realized ambipolar ionic liquid gated field-effect transistors based on WS2 mono- and bilayers, and investigated their opto-electronic response. A thorough characterization of the transport properties demonstrates the high quality…

Mesoscale and Nanoscale Physics · Physics 2014-04-11 Sanghyun Jo , Nicolas Ubrig , Helmuth Berger , Alexey B. Kuzmenko , Alberto F. Morpurgo

Two-dimensional (2D) MoSi$_2$N$_4$ monolayer is an emerging class of air-stable 2D semiconductor possessing exceptional electrical and mechanical properties. Despite intensive recent research efforts devoted to uncover the material…

Materials Science · Physics 2021-02-03 Liemao Cao , Guanghui Zhou , Qianqian Wang , L. K. Ang , Yee Sin Ang

Two-dimensional (2D) materials viz. transition metal dichalcogenides (TMD) and transition metal oxides (TMO) offer a platform that allows creation of heterostructures with a variety of properties. The optoelectronic industry has observed an…

Materials Science · Physics 2021-06-07 Arunima Singh , Manjari Jain , Saswata Bhattacharya
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