Tunable quantum criticality and super-ballistic transport in a “charge” Kondo circuit

• DOI: 10.1126/science.aan5592
• Publication Date: 2018-05-03T18:08:15Z
• Authors: Z. Iftikhar; A. Anthore; A. K. Mitchell; F. D. Parmentier; U. Gennser; A. Ouerghi; A. Cavanna; C. Mora; P. Simon; F. Pierre
• Keywords: [PHYS]Physics [physics]; Condensed Matter - Strongly Correlated Electrons; Quantum Physics; Condensed Matter - Mesoscale and Nanoscale Physics; Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; FOS: Physical sciences; Quantum Physics (quant-ph); 01 natural sciences; [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]

Quantum phase transitions are ubiquitous in many exotic behaviors of strongly-correlated materials. However the microscopic complexity impedes their quantitative understanding. Here, we observe thoroughly and comprehend rich physics two profoundly dissimilar regimes quantum criticality. With a circuit implementing simulator for three-channel Kondo model, reveal universal scalings toward different low-temperature fixed points along multiple crossovers from Notably, an unanticipated violation maximum conductance ballistic free electrons is uncovered. The present charge pseudospin implementation impurity opens access to broad variety phenomena.