Weyl superconductor with dynamical pseudo-axion field, an interplay between high energy and condensed matter physics

• Ano de defesa: 2022
• Autor(a) principal: Chrispim, Breno Almeida da Silveira Dultra
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade do Estado do Rio de Janeiro; Centro de Tecnologia e Ciências::Instituto de Física Armando Dias Tavares; Brasil; UERJ; Programa de Pós-Graduação em Física
• Palavras-chave em Português: Condensed matter – Electronic apparatus and appliances; Topological insulators; Superconductors; Renormalization (Physics); Particles (Nuclear physics); Quantum Field Theory; Superconductivity; Topological Materials; Matéria condensada – Aparelhos e materiais eletrônicos; Isolantes topológicos; Supercondutores; Renormalização (Física); Partículas (Física nuclear); Teoria quântica de campos; Supercondutividade; Materiais topológicos; CIENCIAS EXATAS E DA TERRA::FISICA::FISICA DAS PARTICULAS ELEMENTARES E CAMPOS::TEORIA GERAL DE PARTICULAS E CAMPOS
• Link de acesso: http://www.bdtd.uerj.br/handle/1/20251

Similar structures that arise in a different field are recurrent themes in physics, with the classic example being the renormalization group which was developed simultaneously in both the high energy and condensed matter physics communities. In recent years, another instance, the topological materials, have extended the applications of axion physics beyond its initial purpose in high energy physics. The characterization of such materials requires a new concept called topological order, which links different phases of matter that are not distinguishable by symmetry considerations. Such materials, with some noteworthy examples as topological insulators, Weyl/Dirac semimetals, and Axionic insulators, possess their electromagnetic response rooted in the so-called theta term. This term has different forms. In Weyl semimetal, the theta term has a linear space-time dependency, akin to the CFJ action investigated in the context of Lorentz violating field theories while in axionic insulators this term appears similar to the coupling of the axionlike field (fluctuations of the symmetry breaking chiral condensate). To better understand this connection, we will examine the basics of topological materials and their field theory description. Also, we investigate the electromagnetic response of semimetals when a particular quartic fermionic pairing perturbation triggers the formation of charged chiral condensates resulting in an axionic superconductor (massive photons interacting with axion-like particles). The axion fluctuations corrections to the Yukawa-like potential up to one-loop order and compute the modifications of the London penetration length are also analyzed.