Mesoscopic Klein-Schwinger effect in graphene
ROSTICHER, Michael
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
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Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
ROSTICHER, Michael
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
VOISIN, Christophe
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
TROOST, Jan
Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure] [LPTENS]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure] [LPTENS]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
BAUDIN, Emmanuel
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
< Reduce
Laboratoire Pierre Aigrain [LPA]
Laboratoire de physique de l'ENS - ENS Paris [LPENS]
Language
en
Document de travail - Pré-publication
English Abstract
Strong electric field annihilation by particle-antiparticle pair creation, described in detail by Sauter and Schwinger, is a basic non-perturbative prediction of quantum electrodynamics. Its experimental demonstration ...Read more >
Strong electric field annihilation by particle-antiparticle pair creation, described in detail by Sauter and Schwinger, is a basic non-perturbative prediction of quantum electrodynamics. Its experimental demonstration remains elusive as Schwinger fields E S are beyond reach even for the light electron-positron pairs. Here we put forward a mesoscopic variant of the Schwinger effect in graphene, which hosts Dirac fermions with electron-hole symmetry. Using DC transport and RF noise, we report on universal 1d-Schwinger conductance at the pinch-off of ballistic graphene transistors. Strong pinch-off electric fields are concentrated in a length Λ > ∼ 0.1 µm at the transistor drain, and induce Schwinger e-h pair creation at saturation, for a Schwinger voltage V S = E S Λ on the order of the pinch-off voltage. This Klein-Schwinger effect (KSE) precedes an instability toward an ohmic Zener regime, which is rejected at twice the pinch-off voltage in long devices. The KSE not only gives clues to current saturation limits in ballistic graphene, but also opens new routes for quantum electrodynamic experiments in the laboratory.Read less <
Origin
Hal imported