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Self-Poled Bismuth Ferrite Thin Film Micromachined for Piezoelectric Ultrasound Transducers.
Adv Mater
December 2024
Institute for Superconducting and Electronic Materials, Faculty of Engineering and Information Sciences, University of Wollongong, Innovation Campus, North Wollongong, NSW, 2500, Australia.
Piezoelectric micromachined ultrasound transducers (pMUTs), especially those using lead-free materials, are crucial next-generation microdevices for precise actuation and sensing, driving advancements in medical, industrial, and environmental applications. Bismuth ferrite (BiFeO) is emerging as a promising lead-free piezoelectric material to replace Pb(Zr,Ti)O in pMUTs. Despite its potential, the integration of BiFeO thin films into pMUTs has been hindered by poling issues.
View Article and Find Full Text PDFSpin Excitations of High Spin Iron(II) in Metal-Organic Chains on Metal and Superconductor.
Adv Sci (Weinh)
December 2024
Department of Physics, University of Basel, Klingelbergstrasse 82, Basel, 4056, Switzerland.
Many-body interactions in metal-organic frameworks (MOFs) are fundamental for emergent quantum physics. Unlike their solution counterpart, magnetization at surfaces in low-dimensional analogues is strongly influenced by magnetic anisotropy (MA) induced by the substrate and still not well understood. Here, on-surface coordination chemistry is used to synthesize on Ag(111) and superconducting Pb(111) an iron-based spin chain by using pyrene-4,5,9,10-tetraone (PTO) precursors as ligands.
View Article and Find Full Text PDFEmergence of Exotic Spin Texture in Supramolecular Metal Complexes on a 2D Superconductor.
Phys Rev Lett
December 2024
Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.
Designer heterostructures have offered a very powerful strategy to create exotic superconducting states by combining magnetism and superconductivity. In this Letter, we use a heterostructure platform combining supramolecular metal complexes (SMCs) with a quasi-2D van der Waals superconductor NbSe_{2}. Our scanning tunneling microscopy measurements demonstrate the emergence of Yu-Shiba-Rusinov bands arising from the interaction between the SMC magnetism and the NbSe_{2} superconductivity.
View Article and Find Full Text PDFRealizing Strong and Robust Quasi-1D Superconductors via Multiorbital Chains: NaBe as an Example.
Phys Rev Lett
December 2024
State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China.
Quasi-one-dimensional (Q1D) systems are inherently unfavorable for superconductivity due to electronic instabilities and significant quantum fluctuations. This has led to a half-century-long pursuit of strong and robust Q1D superconductors. Herein, we propose an effective multiorbital chain approach that utilizes the interorbital self-doping to not only suppress the instability but also to position the Fermi level near the band edges.
View Article and Find Full Text PDFTheoretical Insights into High- Superconductivity of Structurally Ordered YThH: A First-Principles Study.
ACS Omega
December 2024
Research Center for Advanced Computing Infrastructure, JAIST, 1-1 Asahidai, Nomi 923-1211, Ishikawa, Japan.
There has been a marked increase in interest in high-temperature superconductors over the past few years, sparked by their potential to revolutionize multiple fields, including energy generation and transportation. A particularly promising avenue of exploration has emerged in the form of ternary superhydrides, compounds composed of hydrogen along with two other rare-earth elements. Our investigation focuses on the search for Y-Th-H ternary compounds; employing an evolutionary search methodology complemented by electron-phonon calculations reveals a stable superhydride, 6̅2-YThH, capable of exhibiting a critical temperature ( ) as high as 222 K at 200 GPa along a few low- novel hydrides.
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