Probing the microscopic structure of bound states in quantum point contacts.
Using an approach that allows us to probe the electronic structure of strongly pinched-off quantum point contacts (QPCs), we provide evidence for the formation of self-consistently realized bound states (BSs) in these structures. Our approach exploits the resonant interaction between closely coupled QPCs, and demonstrates that the BSs may give rise to a robust confinement of single spins, which show clear Zeeman splitting in a magnetic field.
Yoon
Y
Y
Department of Electrical Engineering, University at Buffalo, the State University of New York, Buffalo, New York 14260-1920, USA.
Mourokh
L
L
Morimoto
T
T
Aoki
N
N
Ochiai
Y
Y
Reno
J L
JL
Bird
J P
JP