Efectos térmicos sobre la estructura de bandas de cristales sónicos 2D

dc.contributor.advisorVinck Posada, Herbertspa
dc.contributor.advisorGómez González, Edgar Arturospa
dc.contributor.authorGaviria Motato, Jhoan Mauriciospa
dc.contributor.researchgroupSuperconductividad y Nanotecnologíaspa
dc.date.accessioned2025-02-06T13:00:24Z
dc.date.available2025-02-06T13:00:24Z
dc.date.issued2024
dc.descriptionilustraciones, diagramas, fotografíasspa
dc.description.abstractEn esta tesis se estudian los efectos térmicos en la estructura de bandas de cristales sónicos compuestos por dispersores de BST sumergidos en agua, en un rango de temperaturas de 30 a 50◦C. Se comienza analizando un cristal sónico con una red hexagonal de dispersores cilíndricos de BST, observando que el ancho máximo de la brecha de bandas a 30◦C es de Δω = 0,32684(2πcl/a), incrementándose en un 7,21% a 40◦C y en un 10,98% a 50◦C. Además, se estudian los modos en una cavidad tipo H1 dentro del cristal regular, encontrando que la frecuencia fundamental a 30◦C es 1,31749(2πcl/a), con un desplazamiento de hasta 3,72% hacia frecuencias mayores a 50◦C. Finalmente, se examinan los efectos térmicos en un cristal sónico fractal con una red cuadrada de dispersores cuadrangulares para las primeras 3 iteraciones de un fractal tipo alfombra de Sierpinski. En este caso, no se identifican brechas de bandas completas en ninguna de las iteraciones, aunque se observan brechas parciales a lo largo de la dirección ΓX, con un ancho de banda máximo de aproximadamente 0,1218(2πcl/a) a 30◦C, aumentando hasta un 2,34% a 50◦C (Texto tomado de la fuente).spa
dc.description.abstractThis thesis investigates the thermal effects on the band structure of sonic crystals composed of BST scatterers immersed in water, with temperatures ranging from 30 to 50◦C. The study begins with a sonic crystal featuring a hexagonal lattice of cylindrical BST scatterers, where the maximum band gap width at 30◦C is ∆ω = 0,32684(2πcl/a), increasing by 7,21 % at 40◦C and 10,98 % at 50◦C. Furthermore, the modes within an H1-type cavity in the regular crystal are analyzed, showing that the fundamental frequency at 30◦C is 1,31749(2πcl/a), shifting up to 3,72 % to higher frequencies at 50◦C. Finally, the thermal effects on a fractal sonic crystal with a square lattice of quadrangular scatterers are examined for the first 3 iterations of a Sierpinski carpet fractal. No complete band gaps are observed in any of the iterations, but partial band gaps are found along the ΓX direction, with a maximum band gap width of approximately 0,1218(2πcl/a) at 30◦C, increasing up to 2,34 % at 50◦C.eng
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ciencias - Físicaspa
dc.description.researchareaCristales Sónicosspa
dc.format.extentxv, 94 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/87440
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.facultyFacultad de Cienciasspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Ciencias - Maestría en Ciencias - Físicaspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseReconocimiento 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/spa
dc.subject.ddc530 - Física::531 - Mecánica clásicaspa
dc.subject.ddc620 - Ingeniería y operaciones afines::621 - Física aplicadaspa
dc.subject.lembCRISTALESspa
dc.subject.lembCrystalseng
dc.subject.lembECUACIONES ONDULATORIASspa
dc.subject.lembWave equationseng
dc.subject.lembONDAS ELASTICASspa
dc.subject.lembElastic waveseng
dc.subject.proposalCristales sónicosspa
dc.subject.proposalEstructura de bandasspa
dc.subject.proposalBrecha de bandasspa
dc.subject.proposalCavidad de cristal sónicospa
dc.subject.proposalTransición de fase ferroeléctricaspa
dc.subject.proposalAlfombra de Sierpinskispa
dc.subject.proposalSonic Crystalseng
dc.subject.proposalBand Structureeng
dc.subject.proposalBand Gapeng
dc.subject.proposalSonic Crystal Cavityeng
dc.subject.proposalFerroelectric Phase Transitioneng
dc.subject.proposalSierpinski Carpeteng
dc.titleEfectos térmicos sobre la estructura de bandas de cristales sónicos 2Dspa
dc.title.translatedThermal effects on the band structure of 2D sonic crystalseng
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentInvestigadoresspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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