One of the most important goals of condensed matter physics is materials by design, i.e. the ability to reliably predict and design materials with a set of desired properties. A striking example is the deterministic enhancement of the superconducting properties of materials. Recent experiments have demonstrated that the metamaterial approach is capable of achieving this goal, such as tripling the critical temperature T in Al-AlO epsilon near zero (ENZ) core-shell metamaterial superconductors. Here, we demonstrate that an Al/AlO hyperbolic metamaterial geometry is capable of a similar T enhancement, while having superior transport and magnetic properties compared to the core-shell metamaterial superconductors.
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http://dx.doi.org/10.1038/srep34140 | DOI Listing |
Nat Commun
April 2024
Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA.
In this work, a photonic thermal switch is proposed based on the phase-change material vanadium dioxide (VO) within the framework of near-field radiative heat transfer (NFRHT). The switch consists of two metamaterials filled with core-shell nanoparticles, with the shell made of VO. Compared to traditional VO slabs, the proposed switch exhibits a more than two times increase in the switching ratio, reaching as high as 90.
View Article and Find Full Text PDFACS Appl Mater Interfaces
August 2023
School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
Nanostructured plasmonic-magnetic metamaterials have gained great research interest due to their enhanced magneto-optical coupling effects. Here, we report a complex three-phase nanocomposite design combining ferromagnetic CoFe with plasmonic TiN and Au as a multifunctional hybrid metamaterial using either a cogrowth or a templated method. Via the first method of cogrowing three phases, three different morphologies of Au-CoFe core-shell nanopillars were formed in the TiN matrix.
View Article and Find Full Text PDFSoft Matter
June 2023
Institute of Advanced Magnetic Materials and International Research Center for EM Metamaterials, College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
PVDF-based polymers with polar covalent bonds are next-generation dielectric materials for electric energy storage applications. Several types of PVDF-based polymers, such as homopolymers, copolymers, terpolymers and tetrapolymers, were synthesized by radical addition reactions, controlled radical polymerizations, chemical modifications or reduction with the monomers of vinylidene fluoride (VDF), tetrafluoroethylene (TFE), trifluoroethylene (TrFE), hexafluoropropylene (HFP) and chlorotrifluoroethylene (CTFE). Owing to rich molecular structures and complicated crystal structures, PVDF-based dielectric polymers can show versatile dielectric polarization properties, including normal ferroelectrics, relaxor ferroelectrics, anti-ferroelectrics and linear dielectrics, which are beneficial for designing polymer films with high capacity and high charge-discharge efficiency for capacitor applications.
View Article and Find Full Text PDFACS Appl Mater Interfaces
May 2023
Institute of Applied Physics and Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany.
Heterostructures increasingly attracted attention over the past several years to enable various optoelectronic and photonic applications. In this work, atomically thin interfaces of Ir/AlO heterostructures compatible with micro-optoelectronic technologies are reported. Their structural and optical properties were determined by spectroscopic and microscopic techniques (XRR, XPS, HRTEM, spectroscopic ellipsometry, and UV/vis/NIR spectrophotometry).
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