A novel method for thermal conductivity measurement of two dimensional materials

buir.advisorKasırga, Talip Serkan
dc.contributor.authorÇakıroğlu, Onur
dc.date.accessioned2019-09-17T09:05:28Z
dc.date.available2019-09-17T09:05:28Z
dc.date.copyright2019-09
dc.date.issued2019-09
dc.date.submitted2019-09-12
dc.departmentDepartment of Physicsen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Physics, İhsan Doğramacı Bilkent University, 2019.en_US
dc.descriptionIncludes bibliographical references (leaves 54-61).en_US
dc.description.abstractThermal conductivity is a quantity which governs the heat transfer in a material. After increasing importance of efficiency in power generation systems and cooling mechanisms in micro-structures, many measurement methods have been developed to explore the thermal conductivity in micro and nano-sized materials. However, complexity in experimental setups, difficulties in the fabrication of devices required for measurements, and lacking exact solutions to thermal equations limit the usability of the methods to a class of materials. It is particularly challenging to study atomically thin metallic materials. To tackle this challenge, we have developed a new thermal conductivity measurement method based on the temperature dependent electrical resistance change and analyzed our method analytically and numerically by finite element method. We applied our method to 2H-TaS2 and found thermal conductivity as 9.55 1.27 W/m.K. Thermal conductivity value of TaS2, a metallic transition metal dichalcogenide was measured for the first time. This is supported by Wiedemann-Franz law and thermal conductivity of similar materials such as 2H-TaSe2 and 1T-TaS2. The method can be applied to semiconducting thin materials as well and is superior to other methods in various ways.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityby Onur Çakıroğluen_US
dc.embargo.release2020-03-12
dc.format.extentxvi, 65 leaves : illustrations (some color), charts (some color) ; 30 cm.en_US
dc.identifier.itemidB122028
dc.identifier.urihttp://hdl.handle.net/11693/52438
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectThermal conductivityen_US
dc.subject2D materialsen_US
dc.subjectTemperature dependent resistance changeen_US
dc.subjectFinite element methoden_US
dc.subjectHeat equationen_US
dc.titleA novel method for thermal conductivity measurement of two dimensional materialsen_US
dc.title.alternativeİki boyutlu malzemelerin termal iletkenliklerinin ölçümü için yeni yöntemen_US
dc.typeThesisen_US

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