Thermal Casimir and Casimir-Polder interactions in N parallel 2D Dirac materials

Autor(es)

Khusnutdinov, Nail ^{[1, 2]} ; Kashapov, Rashid ^[2] ; Woods, Lilia M. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, Ctr Matemat Computacao & Cognicao, BR-09210170 Santo Andre, SP - Brazil

^[2] Kazan Fed Univ, Inst Phys, Kremlevskaya 18, Kazan 420008 - Russia

^[3] Univ S Florida, Dept Phys, Tampa, FL 33620 - USA

• Tipo de documento: Artigo Científico
• Fonte: 2D MATERIALS; v. 5, n. 3 JUL 2018.
• Citações Web of Science: 4

Resumo

The Casimir and Casimir-Polder interactions are investigated in a stack of equally spaced graphene layers. The optical response of the individual graphene is taken into account using gauge invariant components of the polarization tensor extended to the whole complex frequency plane. The planar symmetry for the electromagnetic boundary conditions is further used to obtain explicit forms for the Casimir energy stored in the stack and the Casimir-Polder energy between an atom above the stack. Our calculations show that these fluctuation induced interactions experience strong thermal effects due to the graphene Dirac-like energy spectrum. The spatial dispersion and temperature dependence in the optical response are also found to be important for enhancing the interactions especially at smaller separations. Analytical expressions for low and high temperature limits and their comparison with corresponding expressions for an infinitely conducting planar stack are further used to expand our understanding of Casimir and Casimir-Polder energies in Dirac materials. Our results may be useful to experimentalists as new ways to probe thermal effects at the nanoscale in such universal interactions. (AU)

• Processo FAPESP: 17/50294-1 - Quantum field theory in Dirac materials
• Beneficiário: Dmitry Vasilevich
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/03319-6 - Métodos não perturbativos em teoria quântica e em TQC e aplicações deles aos problemas de física atuais
• Beneficiário: Dmitri Maximovitch Guitman
• Modalidade de apoio: Auxílio à Pesquisa - Temático