VietNam 2013 

IXth Rencontres du Vietnam
Quy-Nhon, August 4-10, 2013


 Nanophysics: from fundamentals to applications

(the return)


Wednesday 7
Dots and wires

› 14:40 - 15:00 (20min)
Tomonaga-Luttinger physics in electronic quantum circuits
Sébastien Jezouin  1@  , Mathias Albert  2@  , François Parmentier  1@  , Anne Anthore  1@  , Ulf Gennser  1@  , Antonella Cavanna  1@  , Inès Safi  2, *@  , Frédéric Pierre  1, *@  
1 : Laboratoire de photonique et de nanostructures  (LPN)
Route de Nozay 91460 MARCOUSSIS -  France
2 : Laboratoire de Physique des Solides  (LPS)  -  Website
CNRS : UMR8502, Université Paris XI - Paris Sud
Bat. 510 91405 Orsay cedex -  France
* : Corresponding author

In 1D conductors, Coulomb interactions result in correlated electronic systems markedly different from Fermi liquids. For short-range interactions, the collective nature of the so-called Tomonaga-Luttinger liquids (TLL) shows-up as a power-law conductance suppression at low energy in presence of an impurity.

A seemingly different problem is that of the quantum laws of electricity when distinct quantum conductors are assembled in a mesoscopic circuit. In particular, in violation of classical impedances composition, the conductance across a quantum conductor embedded in a dissipative circuit is suppressed at low energy, a phenomenon called dynamical Coulomb blockade (DCB).

In this talk, I will present an experimental investigation of the DCB on a single-channel quantum conductor, and will demonstrate a proposed link to TLL physics.

A remarkable feature in the data implies a phenomenological expression for the conductance of a single-channel quantum conductor embedded in an arbitrary linear circuit. Its validity is established experimentally using a wide range of circuits, including the carbon nanotube data in [Nature 488, 61 (2012)].
Then, b
y confronting both the conductance and the phenomenological expression with the universal TLL scaling curve, we establish experimentally the predicted mapping.

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