Enhancement of the electrical properties of Au/MgSe/Au microwave resonators via pulsed laser welding of MgSe and Au nanosheets

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dc.authoridAtef Fayez Qasrawi / 0000-0001-8193-6975en_US
dc.authorscopusidAtef Fayez Qasrawi / 6603962677en_US
dc.authorwosidAtef Fayez Qasrawi / R-4409-2019en_US
dc.contributor.authorAlmotiri, R. A.
dc.contributor.authorQasrawi, Atef Fayez
dc.contributor.authorAgha, B. S.
dc.date.accessioned2023-04-17T06:44:59Z
dc.date.available2023-04-17T06:44:59Z
dc.date.issued2023en_US
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.description.abstractHerein, stacked nanosheets of Au (50 nm) and MgSe (100 nm) are fabricated by the thermal evaporation technique and welded by pulsed lasers of wavelengths of 1064 nm within few seconds. Au/MgSe (AMA) and welded Au/MgSe (PLW) interfaces are coated with another Au point contact and employed as microwave resonators. It is observed that both AMA and PLW devices are of amorphous structure. The laser welding technique resulted in formation clusters composed of very dense grains of Mg1.37AuSe1.18 and other clusters composed of Mg1.16Se. In addition, the impedance spectroscopy measurements on these nano-thick devices have shown their novel ability to perform as negative capacitance sources and as band-stop filters. The pulsed laser welding of these microwave resonators increased their ac conductivities by increasing the hopping sites in the devices. The density of localized states near the Fermi level is increased by ~ 21% and the scattering time constant between hopping sites is shortened via laser welding. As microwave resonators, the pulsed laser welding process shifted the notch frequency from 1.0 to 2.16 GHz, improved the negativity of the capacitance, increased the return loss values and lowered the voltage standing wave ratios to 1.0. The features of the AMA microwave resonators before and after the pulsed laser welding nominate them for use as band-stop filters and as negative capacitance sources.en_US
dc.identifier.doi10.1007/s00339-023-06583-4en_US
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85150981222en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage289en_US
dc.identifier.urihttps://doi.org/10.1007/s00339-023-06583-4
dc.identifier.urihttps://hdl.handle.net/20.500.12713/3898
dc.identifier.volume129en_US
dc.identifier.wosWOS:000958325900002en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorQasrawi, Atef Fayez
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofApplied Physics A Materials Science and Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMgSe Nanosheetsen_US
dc.subjectPulsed Laser Weldingen_US
dc.subjectMgAuSe Alloyen_US
dc.subjectMicrowaveen_US
dc.subject4G Technologyen_US
dc.titleEnhancement of the electrical properties of Au/MgSe/Au microwave resonators via pulsed laser welding of MgSe and Au nanosheetsen_US
dc.typeArticleen_US

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