Thermal properties in low dimensional structures below 1 K

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dc.contributor.author Karvonen, Jenni
dc.date.accessioned 2009-11-30T13:16:02Z
dc.date.available 2009-11-30T13:16:02Z
dc.date.issued 2009
dc.identifier.isbn 978-951-39-3584-9
dc.identifier.uri http://urn.fi/URN:ISBN:978-951-39-3584-9 en
dc.identifier.uri http://hdl.handle.net/123456789/22473
dc.description.abstract In this thesis thermal properties of low dimensional structures were experimentally studied at low temperatures with the help of tunnel junction thermometry and the Joule heating technique. The main objects of study were electron-phonon coupling in disordered thin metal films and phonon transport in suspended silicon nitride membranes. Our aim has been to clarify the effect of the phonon dimensionality, i.e. the effect of boundaries to the phonon modes and the transition from 3D to 2D phonons. The dimensionality cross over had not been observed before this work even though it is fabricationally a standard procedure to create the low dimensional environments for nanoscale applications and devices. The main conclusion here is that the nature of thermal phenomena can differ drastically in lower dimensional structures compared to bulk behaviour, and sometimes surprisingly advantageous ways. en
dc.language.iso eng
dc.publisher University of Jyväskylä
dc.relation.ispartofseries Research report / Department of Physics, University of Jyväskylä;0075-465X ;no. 8/2009
dc.relation.isversionof ISBN 978-951-39-3583-2
dc.subject.other thermal relaxation
dc.subject.other electron-phonon coupling
dc.subject.other phonon transport
dc.subject.other low dimensional structures
dc.subject.other SINIS thermometry
dc.title Thermal properties in low dimensional structures below 1 K en
dc.type Diss. fi
dc.identifier.urn URN:ISBN:978-951-39-3584-9
dc.subject.ysa Thermal relaxation, electron-phonon coupling, phonon transport, low dimensional structures, SINIS thermometry
dc.subject.kota 114
dc.type.dcmitype Text en
dc.type.ontasot Väitöskirja fi
dc.type.ontasot Doctoral dissertation en
dc.contributor.tiedekunta Matemaattis-luonnontieteellinen tiedekunta fi
dc.contributor.tiedekunta Faculty of Mathematics and Science en
dc.contributor.yliopisto University of Jyväskylä en
dc.contributor.yliopisto Jyväskylän yliopisto fi

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