{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:56107"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:56107","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Spin-Phonon-Kopplung und Spin-Anregungen in quasi-eindimensionalen Spinsystemen","abstract":"Following the investigations of two-dimensional superconducting cuprates and the search for related transition metal oxides a fascinating field of copper oxide compounds, vanadates, manganates and nikelates opened up. These compounds show effects of strong electronic correlations and in particular magnetism in low dimensions. Magnetism in low dimensions has a history reaching back to the origin of quantum mechanics. The suppression of long-range order sets the stage for an enormous complexity of possible ground states and many-body states. The ground state is dominated by strong quantum fluctuations and pronounced spin-spin correlations. Raman light scattering has been used to examine low dimensional quantum spin systems. An important aspect is the examination of magnetic bound states, a universal property of these systems. These states are due to strong triplet triplet interactions. In theoretical models frustration and spin phonon coupling are discussed to be the reason for the strong triplet triplet interaction. The influence of the later on the excitation spectrum has been nearly unresolved. Therefore, an important aspect of this work has been to determine the influence of spin phonon coupling: It has been possible to show that spin phonon coupling posses a strong influence on the spin as well as the phonon system in real systems.","abstract_html":"Following the investigations of two-dimensional superconducting cuprates and the search for related transition metal oxides a fascinating field of copper oxide compounds, vanadates, manganates and nikelates opened up. These compounds show effects of strong electronic correlations and in particular magnetism in low dimensions. Magnetism in low dimensions has a history reaching back to the origin of quantum mechanics. The suppression of long-range order sets the stage for an enormous complexity of possible ground states and many-body states. The ground state is dominated by strong quantum fluctuations and pronounced spin-spin correlations. Raman light scattering has been used to examine low dimensional quantum spin systems. An important aspect is the examination of magnetic bound states, a universal property of these systems. These states are due to strong triplet triplet interactions. In theoretical models frustration and spin phonon coupling are discussed to be the reason for the strong triplet triplet interaction. The influence of the later on the excitation spectrum has been nearly unresolved. Therefore, an important aspect of this work has been to determine the influence of spin phonon coupling: It has been possible to show that spin phonon coupling posses a strong influence on the spin as well as the phonon system in real systems.","abstract_has_math":false,"creators":["Grove, Matthias"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Güntherodt, Gernot"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000","date_published":"2000","updated_at":"2026-07-30T19:41:53Z","subjects":["info:eu-repo/classification/ddc/530","Physik","Quantenspinsystem","Gebundener Zustand","Phonon","Raman-Effekt"],"languages":["ger"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-118232%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-118232%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-118232%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/56107","outbound_label":"Repository record","outbound_source":"dc:identifier"},"source_record":{"url":"https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A56107","prefix":"oai_dc"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Güntherodt, Gernot"]},{"key":"dc:creator","label":"Author","values":["Grove, Matthias"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2000"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-239"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/530","Physik","Quantenspinsystem","Gebundener Zustand","Phonon","Raman-Effekt"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["ger"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/56107","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-118232%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Following the investigations of two-dimensional superconducting cuprates and the search for related transition metal oxides a fascinating field of copper oxide compounds, vanadates, manganates and nikelates opened up. These compounds show effects of strong electronic correlations and in particular magnetism in low dimensions. Magnetism in low dimensions has a history reaching back to the origin of quantum mechanics. The suppression of long-range order sets the stage for an enormous complexity of possible ground states and many-body states. The ground state is dominated by strong quantum fluctuations and pronounced spin-spin correlations. Raman light scattering has been used to examine low dimensional quantum spin systems. An important aspect is the examination of magnetic bound states, a universal property of these systems. These states are due to strong triplet triplet interactions. In theoretical models frustration and spin phonon coupling are discussed to be the reason for the strong triplet triplet interaction. The influence of the later on the excitation spectrum has been nearly unresolved. 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