TY - JOUR
T1 - Manipulation of exchange coupling energy in a few-electron double quantum dot
AU - Hatano, Tsuyoshi
AU - Amaha, S.
AU - Kubo, T.
AU - Tokura, Y.
AU - Nishi, Y.
AU - Hirayama, Y.
AU - Tarucha, S.
PY - 2008/6/2
Y1 - 2008/6/2
N2 - We have used a hybrid vertical-lateral double quantum dot to study the excitation energy spectrum for one- and two-electron states, which are effectively formed on top of a certain core shell. We have observed bonding and antibonding states, and exchange coupled singlet and triplet states for the one- and two-electron states, respectively, and derived the interdot tunnel coupling and exchange coupling energies for various parameters of interdot level detuning, central gate voltage and magnetic field. The obtained exchange coupling energy is consistently reproduced by calculation using the Hund-Mulliken method.
AB - We have used a hybrid vertical-lateral double quantum dot to study the excitation energy spectrum for one- and two-electron states, which are effectively formed on top of a certain core shell. We have observed bonding and antibonding states, and exchange coupled singlet and triplet states for the one- and two-electron states, respectively, and derived the interdot tunnel coupling and exchange coupling energies for various parameters of interdot level detuning, central gate voltage and magnetic field. The obtained exchange coupling energy is consistently reproduced by calculation using the Hund-Mulliken method.
UR - http://www.scopus.com/inward/record.url?scp=44649141298&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44649141298&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.77.241301
DO - 10.1103/PhysRevB.77.241301
M3 - Article
AN - SCOPUS:44649141298
SN - 0163-1829
VL - 77
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 24
M1 - 241301
ER -