Efectos térmicos sobre la estructura de bandas de cristales sónicos 2D
| dc.contributor.advisor | Vinck Posada, Herbert | spa |
| dc.contributor.advisor | Gómez González, Edgar Arturo | spa |
| dc.contributor.author | Gaviria Motato, Jhoan Mauricio | spa |
| dc.contributor.researchgroup | Superconductividad y Nanotecnología | spa |
| dc.date.accessioned | 2025-02-06T13:00:24Z | |
| dc.date.available | 2025-02-06T13:00:24Z | |
| dc.date.issued | 2024 | |
| dc.description | ilustraciones, diagramas, fotografías | spa |
| dc.description.abstract | En 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.abstract | This 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.degreelevel | Maestría | spa |
| dc.description.degreename | Magíster en Ciencias - Física | spa |
| dc.description.researcharea | Cristales Sónicos | spa |
| dc.format.extent | xv, 94 páginas | spa |
| dc.format.mimetype | application/pdf | spa |
| dc.identifier.instname | Universidad Nacional de Colombia | spa |
| dc.identifier.reponame | Repositorio Institucional Universidad Nacional de Colombia | spa |
| dc.identifier.repourl | https://repositorio.unal.edu.co/ | spa |
| dc.identifier.uri | https://repositorio.unal.edu.co/handle/unal/87440 | |
| dc.language.iso | spa | spa |
| dc.publisher | Universidad Nacional de Colombia | spa |
| dc.publisher.branch | Universidad Nacional de Colombia - Sede Bogotá | spa |
| dc.publisher.faculty | Facultad de Ciencias | spa |
| dc.publisher.place | Bogotá, Colombia | spa |
| dc.publisher.program | Bogotá - Ciencias - Maestría en Ciencias - Física | spa |
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| dc.rights.accessrights | info:eu-repo/semantics/openAccess | spa |
| dc.rights.license | Reconocimiento 4.0 Internacional | spa |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | spa |
| dc.subject.ddc | 530 - Física::531 - Mecánica clásica | spa |
| dc.subject.ddc | 620 - Ingeniería y operaciones afines::621 - Física aplicada | spa |
| dc.subject.lemb | CRISTALES | spa |
| dc.subject.lemb | Crystals | eng |
| dc.subject.lemb | ECUACIONES ONDULATORIAS | spa |
| dc.subject.lemb | Wave equations | eng |
| dc.subject.lemb | ONDAS ELASTICAS | spa |
| dc.subject.lemb | Elastic waves | eng |
| dc.subject.proposal | Cristales sónicos | spa |
| dc.subject.proposal | Estructura de bandas | spa |
| dc.subject.proposal | Brecha de bandas | spa |
| dc.subject.proposal | Cavidad de cristal sónico | spa |
| dc.subject.proposal | Transición de fase ferroeléctrica | spa |
| dc.subject.proposal | Alfombra de Sierpinski | spa |
| dc.subject.proposal | Sonic Crystals | eng |
| dc.subject.proposal | Band Structure | eng |
| dc.subject.proposal | Band Gap | eng |
| dc.subject.proposal | Sonic Crystal Cavity | eng |
| dc.subject.proposal | Ferroelectric Phase Transition | eng |
| dc.subject.proposal | Sierpinski Carpet | eng |
| dc.title | Efectos térmicos sobre la estructura de bandas de cristales sónicos 2D | spa |
| dc.title.translated | Thermal effects on the band structure of 2D sonic crystals | eng |
| dc.type | Trabajo de grado - Maestría | spa |
| dc.type.coar | http://purl.org/coar/resource_type/c_bdcc | spa |
| dc.type.coarversion | http://purl.org/coar/version/c_ab4af688f83e57aa | spa |
| dc.type.content | Text | spa |
| dc.type.driver | info:eu-repo/semantics/masterThesis | spa |
| dc.type.redcol | http://purl.org/redcol/resource_type/TM | spa |
| dc.type.version | info:eu-repo/semantics/acceptedVersion | spa |
| dcterms.audience.professionaldevelopment | Investigadores | spa |
| oaire.accessrights | http://purl.org/coar/access_right/c_abf2 | spa |
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