Publications by authors named "Tong-Huai Cheng"

Two-dimensional (2D) alloys hold great promise to serve as important components of 2D transistors, since their properties allow continuous regulation by varying their compositions. However, previous studies are mainly limited to the metallic/semiconducting ones as contact/channel materials, but very few are related to the insulating dielectrics. Here, we use a facile one-step chemical vapor deposition (CVD) method to synthesize ultrathin BiSiGeO dielectric alloys, whose composition is tunable over the full range of just by changing the relative ratios of the GeO/SiO precursors.

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Two-dimensional ferromagnetic materials (2D-FMs) are expected to become ideal candidates for low-power, high-density information storage in next-generation spintronics devices due to their atomically ultrathin and intriguing magnetic properties. However, 2D-FMs with room-temperature Curie temperatures () are still rarely reported, which greatly hinders their research progress and practical applications. Herein, ultrathin Cu-doped CrTe FMs were successfully prepared and can achieve above-room-temperature ferromagnetism with perpendicular magnetic anisotropy via a facile chemical vapor deposition (CVD) method, which can be controlled down to an atomic thin layer of ∼3.

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Article Synopsis
  • Three-dimensional magnetoplasmonic nanostructures offer improved optical and magneto-optical properties compared to flat structures, presenting new opportunities in photonic devices.
  • Traditional fabrication methods struggle with creating these complex 3D structures, but this research successfully utilizes focused ion beam (FIB) technology to build substrate-free Au/Co/Au configurations.
  • The study reveals that these designs can effectively manipulate the Faraday effect, enhancing the local magnetic field and allowing for tunable properties, which greatly expands the potential for innovative magneto-optical devices.
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Article Synopsis
  • Square nanopore arrays were created on β-GaO microflakes using focused ion beam (FIB) etching to fabricate solar-blind photodetectors (PDs).
  • The transformation from a gate voltage depletion mode to an oxygen depletion mode was achieved through FIB etching, enhancing the device's performance.
  • The resulting photodetectors showcased impressive metrics, including high responsivity, detectivity, and light-to-dark ratio, while also being stable and reproducible, indicating a promising method for developing advanced PDs.
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