{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23376"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23376","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Magnetism in strongly correlated electron systems","abstract":"This thesis consists of two parts, in which I consider two very different examples of magnetism in strongly correlated electron systems, the high-T$\\sb{c}$ materials and heavy fermions.","abstract_html":"This thesis consists of two parts, in which I consider two very different examples of magnetism in strongly correlated electron systems, the high-T$\\sb{c}$ materials and heavy fermions.","abstract_has_math":true,"creators":["Barzykin, Victor Vadimovich"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Pines, David"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T14:11:58Z","date_published":"2011-05-07T14:11:58Z","updated_at":"2026-07-22T22:25:21Z","subjects":["Physics, Condensed Matter"],"languages":["eng"],"rights":["Copyright 1995 Barzykin, Victor Vadimovich"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543526","(UMI)AAI9543526"],"render_values":[{"text":"AAI9543526","href":null,"code":true},{"text":"(UMI)AAI9543526","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23376","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Pines, David"]},{"key":"dc:creator","label":"Author","values":["Barzykin, Victor Vadimovich"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T14:11:58Z","10000-01-01","1995"]},{"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":["Physics, Condensed Matter"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1995 Barzykin, Victor Vadimovich"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9543526","(UMI)AAI9543526","http://hdl.handle.net/2142/23376"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This thesis consists of two parts, in which I consider two very different examples of magnetism in strongly correlated electron systems, the high-T$\\sb{c}$ materials and heavy fermions.","\"In the first part, I study the magnetic properties of the high temperature superconductors, using both microscopic models and phenomenology based on the nuclear magnetic resonance and neutron scattering data. The resulting theory proposes a universal phase diagram of the magnetic behavior of the high temperature superconductors and related non-superconducting materials. While the overdoped materials exhibit nearly antiferromagnetic Fermi liquid behavior, for which the mean field description is appropriate, I show, on the basis of NMR experiments, that scaling develops in the underdoped metallic cuprate superconductors, once the antiferromagnetic correlation length exceeds a certain value, $\\xi\\sb{cr}\\simeq2$. In the scaling regime, the value of the dynamical critical exponent is $z=1$, which is a consequence of spin waves present in the excitation spectrum. I show that the region of scaling on the phase diagram coinsides with the region of the so-called \"\"spin pseudogap\"\" behavior, which has been observed in many experiments.\"","In the second part I consider the possible origin of small magnetic moment in some heavy fermion compounds. Apart from their heavy carrier mass, UPt$\\sb3$ and URu$\\sb2$Si$\\sb2$ exhibit antiferromagnetic long range order with very small average values of magnetic moment, $\\mu\\sim0.01\\mu\\sb{B}$. I propose that such transitions are driven by an order parameter which is more complicated than that used for ordinary antiferromagnetism, and that the small antiferromagnetic moment appears as a second order effect as a result of the Dzyaloshinskii-Moriya-type interaction. In this thesis, I derive the complete symmetry classification of such states. I also propose methods of experimental verification of the symmetry of the order parameter.","Made available in DSpace on 2011-05-07T14:11:58Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543526.pdf: 4236392 bytes, checksum: 602cda6983faa26fb0ea6e6e4bd6c9c1 (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:04:03Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:30:34-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Magnetism in strongly correlated electron systems"]}]}],"canonical_facts":{"dc:contributor":["Pines, David"],"dc:creator":["Barzykin, Victor Vadimovich"],"dc:date":["2011-05-07T14:11:58Z","10000-01-01","1995"],"dc:description":["This thesis consists of two parts, in which I consider two very different examples of magnetism in strongly correlated electron systems, the high-T$\\sb{c}$ materials and heavy fermions.","\"In the first part, I study the magnetic properties of the high temperature superconductors, using both microscopic models and phenomenology based on the nuclear magnetic resonance and neutron scattering data. The resulting theory proposes a universal phase diagram of the magnetic behavior of the high temperature superconductors and related non-superconducting materials. While the overdoped materials exhibit nearly antiferromagnetic Fermi liquid behavior, for which the mean field description is appropriate, I show, on the basis of NMR experiments, that scaling develops in the underdoped metallic cuprate superconductors, once the antiferromagnetic correlation length exceeds a certain value, $\\xi\\sb{cr}\\simeq2$. In the scaling regime, the value of the dynamical critical exponent is $z=1$, which is a consequence of spin waves present in the excitation spectrum. I show that the region of scaling on the phase diagram coinsides with the region of the so-called \"\"spin pseudogap\"\" behavior, which has been observed in many experiments.\"","In the second part I consider the possible origin of small magnetic moment in some heavy fermion compounds. Apart from their heavy carrier mass, UPt$\\sb3$ and URu$\\sb2$Si$\\sb2$ exhibit antiferromagnetic long range order with very small average values of magnetic moment, $\\mu\\sim0.01\\mu\\sb{B}$. I propose that such transitions are driven by an order parameter which is more complicated than that used for ordinary antiferromagnetism, and that the small antiferromagnetic moment appears as a second order effect as a result of the Dzyaloshinskii-Moriya-type interaction. In this thesis, I derive the complete symmetry classification of such states. I also propose methods of experimental verification of the symmetry of the order parameter.","Made available in DSpace on 2011-05-07T14:11:58Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9543526.pdf: 4236392 bytes, checksum: 602cda6983faa26fb0ea6e6e4bd6c9c1 (MD5) Previous issue date: 1995","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:04:03Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:30:34-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9543526","(UMI)AAI9543526","http://hdl.handle.net/2142/23376"],"dc:language":["eng"],"dc:rights":["Copyright 1995 Barzykin, Victor Vadimovich"],"dc:subject":["Physics, Condensed Matter"],"dc:title":["Magnetism in strongly correlated electron systems"],"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":"2026-07-22T22:25:21Z"}