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Laser-Induced Synthesis of Tin Sulfides.
Small
November 2024
Center for Photonic Science and Engineering (CPhSE), Skolkovo Institute of Science and Technology, 3 Nobel Street, Moscow, 143026, Russian Federation.
Various polytypes of van der Waals (vdW) materials can be formed by sulfur and tin, which exhibit distinctive and complementary electronic properties. Hence, these materials are attractive candidates for the design of multifunctional devices. This work demonstrates direct selective growth of tin sulfides by laser irradiation.
View Article and Find Full Text PDFEngineering interfacial polarization switching in van der Waals multilayers.
Nat Nanotechnol
June 2024
Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA.
In conventional ferroelectric materials, polarization is an intrinsic property limited by bulk crystallographic structure and symmetry. Recently, it has been demonstrated that polar order can also be accessed using inherently non-polar van der Waals materials through layer-by-layer assembly into heterostructures, wherein interfacial interactions can generate spontaneous, switchable polarization. Here we show that deliberate interlayer rotations in multilayer van der Waals heterostructures modulate both the spatial ordering and switching dynamics of polar domains.
View Article and Find Full Text PDFEncoding multistate charge order and chirality in endotaxial heterostructures.
Nat Commun
September 2023
Department of Chemistry, University of California, Berkeley, CA, 94720, USA.
High-density phase change memory (PCM) storage is proposed for materials with multiple intermediate resistance states, which have been observed in 1T-TaS due to charge density wave (CDW) phase transitions. However, the metastability responsible for this behavior makes the presence of multistate switching unpredictable in TaS devices. Here, we demonstrate the fabrication of nanothick verti-lateral H-TaS/1T-TaS heterostructures in which the number of endotaxial metallic H-TaS monolayers dictates the number of resistance transitions in 1T-TaS lamellae near room temperature.
View Article and Find Full Text PDFAtomically Unveiling an Atlas of Polytypes in Transition-Metal Trihalides.
J Am Chem Soc
February 2023
School of Materials Science and Engineering, Peking University, Beijing100871, China.
Article Synopsis
- Transition-metal trihalides MX (with M = Cr, Ru and X = Cl, Br, I) are promising materials for next-generation spintronic devices due to their two-dimensional magnetic properties and potential for topological magnons.
- The study developed a nondestructive transfer method to analyze the stacking orders of MX at the atomic level, identifying a new monoclinic phase and revealing various magnetic ground states influenced by their unique structures.
- Findings show that these materials exhibit a rich variety of stacking polytypes and strain soliton boundaries, enabling transitions from antiferromagnetic to ferromagnetic states, thus enhancing the understanding and manipulation of their magnetic properties.
Layer-Stacking Sequence Governs Ion-Storage in Layered Double Hydroxides.
J Phys Chem Lett
January 2023
Research Initiative for Supra-Materials (RISM), Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
In layered materials, the layer-stacking sequence allows the tuning of ion transport and storage properties by modulating the host-ion interactions. However, unlike in the case of cations, the relationship between the stacking sequence and anion transport and storage properties is less clearly understood. Herein, we demonstrate that the stacking sequence governs the nitrate-storage properties of layered double hydroxides (LDHs); the 2 polytype enhances the nitrate-storage capacity to 400% of that of the 3 polytype.
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