Sliding ferroelectricity in van der Waals layered γ-InSe semiconductor
Nature Communications, 2023 Exploring two-dimensional layered ferroelectric semiconductors is highly desired for ferroelectric-based devices. Here, the authors realize the room-temperature ferroelectricity in layered Y-doped γ-InSe due to the microstructure modifications.
Fengrui Sui +7 more
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The Relationship between Electron Transport and Microstructure in Ge2Sb2Te5 Alloy
Nanomaterials, 2023 Phase-change random-access memory (PCRAM) holds great promise for next-generation information storage applications. As a mature phase change material, Ge2Sb2Te5 alloy (GST) relies on the distinct electrical properties of different states to achieve ...
Cheng Liu +5 more
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Band-gap engineering in AB(O$_x$S$_{1-x}$)$_{3}$ perovskite oxysulfides: A route to strongly polar materials for photocatalytic water splitting [PDF]
, 2019 Polar heterogeneous photocatalysts were shown to lead to enhanced charge-carrier separation that results in superior activity for example for photocatalytic water splitting.
Aschauer, Ulrich, Vonrüti, Nathalie
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Ion adsorption-induced reversible polarization switching of a van der Waals layered ferroelectric
Nature Communications, 2021 Whether it is possible to achieve polarization inversion in a ferroelectric without any energy consumption is an open question. Here, the authors demonstrate an energy-free approach to control the polarization state of CuInP2S6, a typical room ...
Dong-Dong Xu +7 more
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Modulation of Ferroelectric and Optical Properties of La/Co-Doped KNbO3 Ceramics
Nanomaterials, 2021 The phase transition, microscopic morphology and optical and ferroelectric properties are studied in a series of La- and Co-doped KNbO3-based ceramics. The results show that the doping induces the transformation from the orthorhombic to the cubic phase ...
Xue Zhang +10 more
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Color-Switchable Polar Polymeric Materials [PDF]
ACS Applied Materials & Interfaces, 2019 Spiropyran is an important mechanophore, which has rarely been incorporated as a cross-linker in polar polymer matrices, limiting its applications in innovative mechanochromic devices. Here, three spiropyrans with two- or three-attachment positions were synthesized and covalently bonded in polar poly(hydroxyethyl acrylate) (PHEA), to achieve color ...
Wenlian Qiu, Paul A. Gurr, Greg G. Qiao
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The Lyddane-Sachs-Teller relationship for polar vibrations in materials with monoclinic and triclinic crystal systems [PDF]
, 2016 A generalization of the Lyddane-Sachs-Teller relation is presented for polar vibrations in materials with monoclinic and triclinic crystal systems. The generalization is derived from an eigen displacement vector summation approach, which is equivalent to
Schubert, Mathias
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Understanding and enhancing polarization in complex materials [PDF]
Computing in Science & Engineering, 2004 Recent advances in theoretical methods and high-performance computing allow for reliable first-principles investigations of complex materials. This article focuses on calculating and predicting the properties of piezoelectrics and "designing" new materials with enhanced piezoelectric responses. This paper considers two systems: boron-nitride nanotubes (
Jerry Bernholc +3 more
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Infrared emission bands and thermal effects for 440-nm-emitting GaN-based laser diodes
AIP Advances, 2020 Broad emission bands due to defects in (In,Ga,Al)N laser diodes operating at 440 nm are investigated using continuous-wave and pulsed currents. In addition to known yellow–green and short-wave infrared bands, defect emissions were observed even in the ...
Feng Mao +8 more
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Dirac fermion metagratings in graphene
npj 2D Materials and Applications, 2021 We theoretically demonstrate a Dirac fermion metagrating which is an artificially engineered material in graphene. Although its physics mechanism is different from that of optical metagrating, both of them can deliver waves to one desired diffraction ...
Pengcheng Wan +6 more
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