Low-temperature dephasing in irradiated metallic wires

Thibaut Capron (1) , Yasuhiro Niimi (1) , François Mallet , Yannick Baines (1) , Dominique Mailly (2) , Fang-Yuh Lo (3) , Alexander Melnikov (3) , Andreas Wieck (3) , Laurent Saminadayar (4) , Christopher Bäuerle (1)

1 NEEL - QuantECA - Circuits électroniques quantiques Alpes
2 LPN - Laboratoire de photonique et de nanostructures
3 Lehrstuhl für Angewandte Festkörperphysik
4 NEEL - TPS - Thermodynamique et biophysique des petits systèmes

We present phase coherence time measurements in quasi-one-dimensional Ag wires implanted with Ag+ ions with an energy of 100 keV. The measurements have been carried out in the temperature range from 100 mK up to 10 K; this has to be compared with the Kondo temperature of iron in silver, i.e. TK {Ag/Fe} ~ 4 K, used in recent experiments on dephasing in Kondo systems {mallet_prl_06,birge_prl_06}. We show that the phase coherence time is not affected by the implantation procedure, clearly proving that ion implantation process by itself does not lead to any extra dephasing at low temperature.

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Thibaut Capron, Yasuhiro Niimi, François Mallet, Yannick Baines, Dominique Mailly, et al.. Low-temperature dephasing in irradiated metallic wires. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 77, pp.033102. ⟨10.1103/PhysRevB.77.033102⟩. ⟨hal-00311484⟩