dc.contributor.author | Puurtinen, Tuomas | |
dc.contributor.author | Maasilta, Ilari | |
dc.date.accessioned | 2016-12-14T06:10:59Z | |
dc.date.available | 2016-12-14T06:10:59Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Puurtinen, T., & Maasilta, I. (2016). Low temperature heat capacity of phononic crystal membranes. <i>AIP Advances</i>, <i>6</i>(12), Article 121902. <a href="https://doi.org/10.1063/1.4968619" target="_blank">https://doi.org/10.1063/1.4968619</a> | |
dc.identifier.other | CONVID_26353900 | |
dc.identifier.other | TUTKAID_71928 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/52328 | |
dc.description.abstract | Phononic crystal (PnC) membranes are a promising solution to improve sensitivity
of bolometric sensor devices operating at low temperatures. Previous work has concentrated
only on tuning thermal conductance, but significant changes to the heat
capacity are also expected due to the modification of the phonon modes. Here, we
calculate the area-specific heat capacity for thin (37.5 - 300 nm) silicon and silicon
nitride PnC membranes with cylindrical hole patterns of varying period, in the temperature
range 1 - 350 mK. We compare the results to two- and three-dimensional
Debye models, as the 3D Debye model is known to give an accurate estimate for the
low-temperature heat capacity of a bulk sample. We found that thin PnC membranes
do not obey the 3D Debye T3 law, nor the 2D T2 law, but have a weaker, approximately
linear temperature dependence in the low temperature limit. We also found
that depending on the design, the PnC patterning can either enhance or reduce the
heat capacity compared to an unpatterned membrane of the same thickness. At temperatures
below 100 mK, reducing the membrane thickness unintuitively increases
the heat capacity for all samples studied. These observations can have significance
when designing calorimetric detectors, as heat capacity is a critical parameter for the
speed and sensitivity of a device. | |
dc.language.iso | eng | |
dc.publisher | American Institute of Physics | |
dc.relation.ispartofseries | AIP Advances | |
dc.subject.other | low temperatures | |
dc.subject.other | phononic crystal membranes | |
dc.title | Low temperature heat capacity of phononic crystal membranes | |
dc.type | article | |
dc.identifier.urn | URN:NBN:fi:jyu-201612024899 | |
dc.contributor.laitos | Fysiikan laitos | fi |
dc.contributor.laitos | Department of Physics | en |
dc.contributor.oppiaine | Nanoscience Center | fi |
dc.contributor.oppiaine | Nanoscience Center | en |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
dc.date.updated | 2016-12-02T04:20:11Z | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.relation.issn | 2158-3226 | |
dc.relation.numberinseries | 12 | |
dc.relation.volume | 6 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © 2016 Author(s). All article content, except where
otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license | |
dc.rights.accesslevel | openAccess | fi |
dc.subject.yso | lämpökapasiteetti | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p11389 | |
dc.rights.url | https://creativecommons.org/licenses/by/4.0/ | |
dc.relation.doi | 10.1063/1.4968619 | |
dc.type.okm | A1 | |