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dc.contributor.advisorÇıracı, Salim
dc.contributor.authorÖzpineci, Altuğ
dc.date.accessioned2016-01-08T20:16:31Z
dc.date.available2016-01-08T20:16:31Z
dc.date.issued1999
dc.identifier.urihttp://hdl.handle.net/11693/18131
dc.descriptionAnkara : The Department of Physics and the Institute of Engineering and Sciences of Bilkent Univ., 1999.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 1999.en_US
dc.descriptionIncludes bibliographical references leaves 47-49en_US
dc.description.abstractUnderstanding of mechanisms for the energy transfer from and/or through nano particles in contact with the large samples have become important in various biological processes, molecular electronics and friction. In this thesis, the phononic heat conductance of an atomic wire between two reservoirs, and the vibrational relaxation of an atom adsorbed on a surface is studied. The former problem is studied using the Keldysh formalism which yields the steady state properties of the system. The dependence of the total conductance on temperature, on the number of atoms in the wire and on the coefficient is studied. It is found that the conductance shows quantal structure similar to the electronic counterpart. The reduced density matrix is used to study the latter problem. The time evolution of the reduced density matrix has been evaluated for an arbitrary system coupled to a heat bath. The formalism is then applied to study the vibrational relaxation of an atom adsorbed on a surface. The frequency dependence of the relaxation time is also determined.en_US
dc.description.statementofresponsibilityÖzpineci, Altuğen_US
dc.format.extentix, 49 leavesen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectHeat Conductanceen_US
dc.subjectKeldysh Formalismen_US
dc.subjectPhononic Heat Conductance Quantizationen_US
dc.subjectReduced Density Matrixen_US
dc.subjectVibrational Relaxationen_US
dc.subject.lccQC321 .O97 1999en_US
dc.subject.lcshHeat conduction.en_US
dc.subject.lcshHeat--Conduction mathematics.en_US
dc.titleA microscopic approach to phononic energy transfer in nano structuresen_US
dc.typeThesisen_US
dc.departmentDepartment of Physicsen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


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