{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/87980"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/87980","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Some effects of dimensionality and defects on superconductivity","abstract":"This thesis reports some theoretical studies of superconductivity with reduced dimensions. After an intro- duction to the physics of superconductivity with reduced dimensions, we reports our studies in three main topics in this thesis. In Chapter 2, the resistance of superconducting thin wires with finite length is derived in regimes where the LAMH theory fails. In Chapter 3, we consider the effect of planar defects on the superconductivity of Sr2RuO4 thin films. We find that while parallel planar defects does not decrease the the transition temperature of superconductivity, defects that are perpendicular with each other are able to suppress the superconductivity. In Chapter 4, we study the interaction between vortices and interface between two perpendicular anisotropic superconductors. The interface is found to be able to trap vortices and the trapping potential is calculated. This mechanism can be utilized to produce wires with larger critical current density.","abstract_html":"This thesis reports some theoretical studies of superconductivity with reduced dimensions. After an intro- duction to the physics of superconductivity with reduced dimensions, we reports our studies in three main topics in this thesis. In Chapter 2, the resistance of superconducting thin wires with finite length is derived in regimes where the LAMH theory fails. In Chapter 3, we consider the effect of planar defects on the superconductivity of Sr2RuO4 thin films. We find that while parallel planar defects does not decrease the the transition temperature of superconductivity, defects that are perpendicular with each other are able to suppress the superconductivity. In Chapter 4, we study the interaction between vortices and interface between two perpendicular anisotropic superconductors. The interface is found to be able to trap vortices and the trapping potential is calculated. This mechanism can be utilized to produce wires with larger critical current density.","abstract_has_math":false,"creators":["Yu, Jitong"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Leggett, Anthony J.","Fradkin, Eduardo H.","Eckstein, James N.","Schulten, Klaus J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-29T20:37:50Z","date_published":"2015-09-29T20:37:50Z","updated_at":"2026-07-22T22:26:31Z","subjects":["vortex pinning","critical current","superconductor","superconducting","dimensionality","defect","nanowire","Langer–Ambegaokar–McCumber–Halperin (LAMH)","resistance","planar defects","Sr2RuO4"],"languages":["en"],"rights":["Copyright 2015 Jitong Yu"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/87980","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Leggett, Anthony J.","Fradkin, Eduardo H.","Eckstein, James N.","Schulten, Klaus J."]},{"key":"dc:creator","label":"Author","values":["Yu, Jitong"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-29T20:37:50Z","2015-08","2015-06-30","2015-8"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["vortex pinning","critical current","superconductor","superconducting","dimensionality","defect","nanowire","Langer–Ambegaokar–McCumber–Halperin (LAMH)","resistance","planar defects","Sr2RuO4"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Jitong Yu"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/87980"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis reports some theoretical studies of superconductivity with reduced dimensions. After an intro- duction to the physics of superconductivity with reduced dimensions, we reports our studies in three main topics in this thesis. In Chapter 2, the resistance of superconducting thin wires with finite length is derived in regimes where the LAMH theory fails. In Chapter 3, we consider the effect of planar defects on the superconductivity of Sr2RuO4 thin films. We find that while parallel planar defects does not decrease the the transition temperature of superconductivity, defects that are perpendicular with each other are able to suppress the superconductivity. In Chapter 4, we study the interaction between vortices and interface between two perpendicular anisotropic superconductors. The interface is found to be able to trap vortices and the trapping potential is calculated. This mechanism can be utilized to produce wires with larger critical current density.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Jitong Yu, accepted the attached license on 2015-06-28 at 17:28.","The student, Jitong Yu, submitted this Dissertation for approval on 2015-06-28 at 17:43.","This Dissertation was approved for publication on 2015-06-30 at 16:44.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8315 on 2015-09-29 at 13:21:40","Made available in DSpace on 2015-09-29T20:37:50Z (GMT). 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In Chapter 2, the resistance of superconducting thin wires with finite length is derived in regimes where the LAMH theory fails. In Chapter 3, we consider the effect of planar defects on the superconductivity of Sr2RuO4 thin films. We find that while parallel planar defects does not decrease the the transition temperature of superconductivity, defects that are perpendicular with each other are able to suppress the superconductivity. In Chapter 4, we study the interaction between vortices and interface between two perpendicular anisotropic superconductors. The interface is found to be able to trap vortices and the trapping potential is calculated. This mechanism can be utilized to produce wires with larger critical current density.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2015-09-29 without embargo terms","The student, Jitong Yu, accepted the attached license on 2015-06-28 at 17:28.","The student, Jitong Yu, submitted this Dissertation for approval on 2015-06-28 at 17:43.","This Dissertation was approved for publication on 2015-06-30 at 16:44.","DSpace SAF Submission Ingestion Package generated from Vireo submission #8315 on 2015-09-29 at 13:21:40","Made available in DSpace on 2015-09-29T20:37:50Z (GMT). No. of bitstreams: 2 YU-DISSERTATION-2015.pdf: 1208478 bytes, checksum: ad9e808a60c315aa6df7c32e76b55732 (MD5) LICENSE.txt: 4206 bytes, checksum: af5652c341e94afe87cfea3da4285d28 (MD5) Previous issue date: 2015-06-30"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/87980"],"dc:language":["en"],"dc:rights":["Copyright 2015 Jitong Yu"],"dc:subject":["vortex pinning","critical current","superconductor","superconducting","dimensionality","defect","nanowire","Langer–Ambegaokar–McCumber–Halperin (LAMH)","resistance","planar defects","Sr2RuO4"],"dc:title":["Some effects of dimensionality and defects on superconductivity"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:31Z"}