Kondo effect from a tunable bound state within a quantum wire.
We investigate the conductance of quantum wires with a variable open quantum dot geometry, displaying an exceptionally strong Kondo effect and most of the 0.7 structure characteristics. Our results indicate that the 0.7 structure is not a manifestation of the singlet Kondo effect. However, specific similarities between our devices and many of the clean quantum wires reported in the literature suggest a weakly bound state is often present in real quantum wires.
Sfigakis
F
F
Cavendish Laboratory, J. J. Thomson Avenue, Cambridge, CB3 OHE, United Kingdom. fs228@cam.ac.uk
Ford
C J B
CJ
Pepper
M
M
Kataoka
M
M
Ritchie
D A
DA
Simmons
M Y
MY