2026-09-23T05:56:16Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/114109 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Bahl, Gaurav 2022-04-29T21:58:41Z 2024-04-29T21:58:46Z 2021-12 Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01 The student, Sasha Yamada, accepted the attached license on 2021-12-08 at 13:02. The student, Sasha Yamada, submitted this Thesis for approval on 2021-12-08 at 13:12. This Thesis was approved for publication on 2021-12-08 at 14:27. DSpace SAF Submission Ingestion Package generated from Vireo submission #17413 on 2022-04-29 at 16:10:41 Made available in DSpace on 2022-04-29T21:58:41Z (GMT). No. of bitstreams: 3 YAMADA-THESIS-2021.pdf: 19421729 bytes, checksum: c6b74f39e846dbda82e7982ba7d82f05 (MD5) Yamada_MS_thesis_final.zip: 25802996 bytes, checksum: a78b3f5529f0540bdb7cef25b85f79cc (MD5) LICENSE.txt: 4209 bytes, checksum: a059ab53b348cc4abe9dc7d7b827b302 (MD5) Previous issue date: 2021-12-08 Embargo set by: Seth Robbins for item 123474 Lift date: 2024-04-29T21:58:46Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system Author requested closed access (OA after 2yrs) in Vireo ETD system Limited application/pdf en text Exploration of crystallographic defects in topological insulator metamaterials Yamada, Sasha Seneca 2021-12-08 Engineering 2022-04-29T21:58:41Z Topological phases of matter have attracted the interest of physicists and engineers due to their novel transport properties and ability to protect robust states at material boundaries. These phases of matter occur when symmetries quantize and protect an invariant material property. While initially thought to be unusual behavior, computational analysis of stoichiometric materials has revealed that over 27% of all materials in nature are topologically non-trivial. The prevalence of these materials provides further cause to study their behavior; however, it remains an experimental challenge to exercise precise control of materials at an atomic level. Fortunately, the topological properties of these materials are governed by the wave-nature of electrons which allows classical analogues to be constructed from metamaterials. Such metamaterials have been constructed using mechanical, electronic, and photonic platforms to study topological phenomena. This thesis describes the construction of circuit-based resonator arrays and their application to experimentally investigate how crystallographic defects interact with a material's topology. Specifically, partial dislocation defects in multipole topological insulators are considered. It is observed that these defects can trap robust bound states at their defect core, which provides a pathway to embed protected topological states deep within the bulk of a material. Thesis eng http://hdl.handle.net/2142/114109 Copyright 2021 Sasha Seneca Yamada Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.