The electromagnetic response of a relativistic Fermi gas at finite temperatures: Applications to condensed-matter systems

Autor(es)

Reyes-Gomez, E. ^[1] ; Oliveira, L. E. ^[2] ; de Carvalho, C. A. A. ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Antioquia UdeA, Inst Fis, Calle 70 52-21, Medellin - Colombia

^[2] Univ Estadual Campinas UNICAMP, Inst Fis, BR-13083859 Campinas, SP - Brazil

^[3] Univ Fed Rio de Janeiro UFRJ, Inst Fis, BR-21945972 Rio De Janeiro, RJ - Brazil

^[4] Inmetro, Campus Xerem, BR-25250020 Duque De Caxias, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EPL; v. 114, n. 1 APR 2016.
• Citações Web of Science: 2

Resumo

We investigate the electromagnetic response of a relativistic Fermi gas at finite temperatures. Our theoretical results are first-order in the fine-structure constant. The electromagnetic permittivity and permeability are introduced via general constitutive relations in reciprocal space, and computed for different values of the gas density and temperature. As expected, the electric permittivity of the relativistic Fermi gas is found in good agreement with the Lindhard dielectric function in the low-temperature limit. Applications to condensed-matter physics are briefly discussed. In particular, theoretical results are in good agreement with experimental measurements of the plasmon energy in graphite and tin oxide, as functions of both the temperature and wave vector. We stress that the present electromagnetic response of a relativistic Fermi gas at finite temperatures could be of potential interest in future plasmonic and photonic investigations. Copyright (C) EPLA, 2016 (AU)

• Processo FAPESP: 12/51691-0 - A física de novos materiais e nanoestruturas semicondutoras
• Beneficiário: Luiz Eduardo Moreira Carvalho de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/21320-3 - A física de novos materiais: fotônica, estrutura de bandas fotônicas, controle do gap fotônico em estruturas fotônicas, polaritons de plasmons, e gap sólitons
• Beneficiário: Luiz Eduardo Moreira Carvalho de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional