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Article Dans Une Revue Nature Physics Année : 2013

Observation of Majorana Quantum Critical Behavior in a Resonant Level Coupled to a Dissipative Environment

H.T. Mebrahtu
  • Fonction : Auteur
I.V. Borzenets
  • Fonction : Auteur
H. Zheng
  • Fonction : Auteur
Y.V. Bomze
  • Fonction : Auteur
A.I. Smirnov
  • Fonction : Auteur
Serge Florens
H. U. Baranger
  • Fonction : Auteur
G. Finkelstein
  • Fonction : Auteur

Résumé

We investigate experimentally an exotic state of electronic matter obtained by fine-tuning to a quantum critical point (QCP), realized in a spin-polarized resonant level coupled to strongly dissipative electrodes. Several transport scaling laws near and far from equilibrium are measured, and then accounted for theoretically. Our analysis reveals a splitting of the resonant level into two quasi-independent Majorana modes, one strongly hybridized to the leads, and the other tightly bound to the quantum dot. Residual interactions involving these Majorana fermions result in the observation of a striking quasi-linear non-Fermi liquid scattering rate at the QCP. Our devices constitute a viable alternative to topological superconductors as a platform for studying strong correlation effects within Majorana physics.

Dates et versions

hal-00985090 , version 1 (29-04-2014)

Identifiants

Citer

H.T. Mebrahtu, I.V. Borzenets, H. Zheng, Y.V. Bomze, A.I. Smirnov, et al.. Observation of Majorana Quantum Critical Behavior in a Resonant Level Coupled to a Dissipative Environment. Nature Physics, 2013, 9, pp.732-737. ⟨10.1038/nphys2735⟩. ⟨hal-00985090⟩

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