Competing orders in Uru2Si2: from ordered magnetism to spin liquid phases

• Ano de defesa: 2017
• Autor(a) principal: Farias, Carlene Paula Silva de
• Orientador(a): Ferraz Filho, Álvaro
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Programa de Pós-Graduação: PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA
• País: Brasil
• Palavras-chave em Português: Antiferromagnetism; Spin liquid; Hidden order; Raman scattering; BCT lattice; Point group symmetry
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA
• Link de acesso: https://repositorio.ufrn.br/jspui/handle/123456789/23653

The main objective of this thesis is to investigate the competing ordered phases in the metallic heavy fermion compound URu2Si2, which displays a bodycentered tetragonal lattice. We first provide a study case of the competition between antiferromagnetic (AF) and spin liquid phases. The antiferromagnetic state is study with spin-wave theory. Whereas the spin liquid analysis has been carried out in an algebraic spin liquid representation. In the second part, we describe an effective theory for Raman scattering experiments at these particular phases. We provide insight about the hidden order phase displayed by the heavy fermion compound URu2Si2.