Characterization of Main Phase in Kxp-Terphenyl and Its Largest Congener Kxpoly(p-phenylene): A Report of Their Magnetic and Electric Properties
| Autor: | Federico Mompean, Carlos Untiedt, Manuel Carrera, James L. McDonald, Mar García-Hernández, Albert Guijarro, J. A. Vergés |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), Generalitat Valenciana, Universidad de Alicante, Universidad de Alicante. Departamento de Química Orgánica, Universidad de Alicante. Departamento de Física Aplicada, Universidad de Alicante. Instituto Universitario de Síntesis Orgánica, Nuevos Materiales y Catalizadores (MATCAT), Grupo de Nanofísica |
| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Materials science Física de la Materia Condensada Magnetic Properties Meissner effect Surfaces Coatings and Films Electronic Optical and Magnetic Materials Characterization (materials science) chemistry.chemical_compound Crystallography Kxpoly(p-phenylene) General Energy Congener Química Orgánica chemistry Phenylene Phase (matter) Terphenyl Kxp-Terphenyl Electric Properties Electric properties Physical and Theoretical Chemistry Magnetic and electric properties |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| Popis: | [EN] The report of the Meissner effect in annealed samples of K3Tp (Tp = p-terphenyl) above 120 K has raised the interest in this deceptively simple material concerning superconductivity. We have investigated the structural integrity of the Tp framework in the annealed samples of KxTp at increasing processing time and temperature T. Our experimental studies show that both K2Tp and K3Tp mixing stoichiometries have identical Raman (solid state) and UV–vis (1,2-dimethoxyethane solution) spectra, being consistent with the molecular dianion by density functional theory and time-dependent density functional theory simulations. Magnetization vs T plots show no signs of superconductivity and neither do conductance vs T plots. Searching for potentially active minor byproducts formed during thermal processing, the role of K-doped poly(p-phenylene) has been examined, but it does not seem to explain the reported effects either. Further efforts are needed to explain the nature of this elusive phenomenon. Financial support by the Spanish Ministry of Economy and Competitiveness (FIS2015-64222-C2-1-P, MAT2014-52405-C2-2-R, and MAT2016-78625-C2-1-2-P), the Generalitat Valenciana (Grant PROMETEO/2017/139), and the University of Alicante (VIGROB-285) is gratefully acknowledged. M.C. thanks the VIDI of the University of Alicante for a predoctoral grant. A.G. greatly appreciates the computational resources provided by the Department of Applied Physics of the University of Alicante. |
| Databáze: | OpenAIRE |
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