Diamagnetism and suppression of screening as hallmarks of electron-hole pairing in a double layer graphene system
arXiv:1412.5132 · doi:10.1103/PhysRevB.91.115442
Abstract
We study how the electron-hole pairing reveals itself in the response of a double layer graphene system to the vector and scalar potentials. Electron-hole pairing results in a rigid (London)relation between the current and the difference of vector potentials in two adjacent layers. The diamagnetic effect can be observed in multiple connected systems in the magnetic field parallel to the graphene layers. Such an effect would be considered as a hallmark of the electron-hole pairing, but the value of the effect is extremely small. Electron-hole pairing significantly changes the response to the scalar potential, as well. It results in a complete (at zero temperature) or partial (at finite temperature) suppression of screening of the electric field of a test charge situated at some distance to the double layer system. A strong increase of the electric field induced by the test charge under decrease in temperature can be considered as a spectacular hallmark of the electron-hole pairing.
arXiv commentrefs. are added, published version
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Cited by in corpus (4)
- Using magnetic stripes to stabilize superfluidity in electron-hole double monolayer graphene
- Electromagnetic properties of a double layer graphene system with electron-hole pairing
- Strong enhancement of third harmonic generation in a double layer graphene system caused by electron-hole pairing
- Anderson-Bogoliubov and Carlson-Goldman modes in counterflow superconductors: Case study of a double monolayer graphene