Chiral Anomaly-Enhanced Casimir Interaction between Weyl Semimetals
- 1 September 2021
- journal article
- research article
- Published by IOP Publishing in Chinese Physics Letters
Abstract
We theoretically study the Casimir interaction between Weyl semimetals. When the distance a between semi-infinite Weyl semimetals is in the micrometer regime, the Casimir attraction can be enhanced by the chiral anomaly. The Casimir attraction depends sensitively on the relative orientations between the separations ( b 1, b 2) of Weyl nodes in the Brillouin zone and show anisotropic behavior for the relative orientation of these separations ( b 1, b 2) when they orient parallel to the interface. This anisotropy is quite larger than that in conventional birefringent materials. The Casimir force can be repulsive in the micrometer regime if the Weyl semimetal slabs are sufficiently thin and the direction of Weyl nodes separations ( b 1, b 2) is perpendicular to the interface. The Casimir attraction between Weyl semimetal slabs decays slower than 1/a 4 when the Weyl nodes separations b 1 and b 2 are both parallel to the interface.Keywords
This publication has 36 references indexed in Scilit:
- Observation of the dynamical Casimir effect in a superconducting circuitNature, 2011
- Repulsive and Restoring Casimir Forces Based on Magneto-Optical EffectChinese Physics Letters, 2011
- Repulsive Casimir Force in Chiral MetamaterialsPhysical Review Letters, 2009
- Measured long-range repulsive Casimir–Lifshitz forcesNature, 2009
- Direct measurement of critical Casimir forcesNature, 2008
- Quantum levitation by left-handed metamaterialsNew Journal of Physics, 2007
- A no-go theorem for regularizing chiral fermionsPhysics Letters B, 1981
- Optics in Stratified and Anisotropic Media: 4×4-Matrix FormulationJournal of the Optical Society of America, 1972
- A PCAC puzzle: π0→γγ in the σ-modelIl Nuovo Cimento A (1971-1996), 1969
- Axial-Vector Vertex in Spinor ElectrodynamicsPhysical Review B, 1969