The Casimir and Casimir--Polder effects for Weyl semi-metals and anisotropic atoms
Quantum field theory under the influence of external conditions
Non perturbative methods in quantum theory and QFT and their application to actual...
| Full text | |
| Author(s): |
Rodriguez-Lopez, Pablo
[1, 2, 3]
;
Popescu, Adrian
[4]
;
Fialkovsky, Ignat
[5]
;
Khusnutdinov, Nail
[5, 6]
;
Woods, Lilia M.
[4]
Total Authors: 5
|
| Affiliation: | [1] Univ Rey Juan Carlos, Area Electromagnetismo, Tulipan S-N, Madrid 28933 - Spain
[2] CSIC, Inst Ciencia Mat Madrid ICMM, Mat Sci Factory, Sor Juana Ines Cruz 3, Madrid 28049 - Spain
[3] GISC Grp Interdisciplinar Sistemas Complejos, Madrid 28040 - Spain
[4] Univ S Florida, Dept Phys, Tampa, FL 33620 - USA
[5] Univ Fed ABC, Ctr Matemat Comp & Cognicao, BR-09210170 Santo Andre, SP - Brazil
[6] Kazan Fed Univ, Reg Sci & Educ Math Ctr, Kremlevskaya 18, Kazan 420008 - Russia
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | COMMUNICATIONS MATERIALS; v. 1, n. 1 MAR 26 2020. |
| Web of Science Citations: | 3 |
| Abstract | |
The Casimir interaction, induced by electromagnetic fluctuations between objects, is strongly dependent upon the electronic and optical properties of the materials making up the objects. Here we investigate this ubiquitous interaction between semi-infinite spaces of topologically nontrivial Weyl semimetals. A comprehensive examination of all components of the bulk conductivity tensor and the surface conductivity due to the Fermi arc states in real and imaginary frequency domains is presented using the Kubo formalism for materials with different degree of tilting of their linear energy cones. The Casimir energy is calculated using a generalized Lifshitz approach, for which electromagnetic boundary conditions for anisotropic materials were derived and used. We find that the interaction between Weyl semimetals is metallic-like and its magnitude and characteristic distance dependence can be modified by the degree of tilting and chemical potential. The nontrivial topology plays a secondary role in the interaction and thermal fluctuations are expected to have similar effects as in metallic systems. The ubiquitous Casimir interaction arises from electromagnetic fluctuations exchanged between objects. Here, by determining the optical conductivity components for type I and II Weyl semimetals, it is found that the Casimir interaction has strong similarities to metals, while the nontrivial topology plays a secondary role. (AU) | |
| FAPESP's process: | 19/10719-9 - The Casimir and Casimir--Polder effects for Weyl semi-metals and anisotropic atoms |
| Grantee: | Nail Khusnutdinov |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/50294-1 - Quantum field theory in Dirac materials |
| Grantee: | Dmitry Vasilevich |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/03319-6 - Non perturbative methods in quantum theory and QFT and their application to actual physical problems |
| Grantee: | Dmitri Maximovitch Guitman |
| Support Opportunities: | Research Projects - Thematic Grants |