TY - JOUR
T1 - Correlated electrons in optically tunable quantum dots
T2 - Building an electron dimer molecule
AU - Singha, Achintya
AU - Pellegrini, Vittorio
AU - Pinczuk, Aron
AU - Pfeiffer, Loren N.
AU - West, Ken W.
AU - Rontani, Massimo
PY - 2010/6/15
Y1 - 2010/6/15
N2 - We observe the low-lying excitations of a molecular dimer formed by two electrons in a GaAs semiconductor quantum dot in which the number of confined electrons is tuned by optical illumination. By employing inelastic light scattering we identify the intershell excitations in the one-electron regime and the distinct spin and charge modes in the interacting few-body configuration. In the case of two electrons, a comparison with configuration-interaction calculations allows us to link the observed excitations with the breathing mode of the molecular dimer and to determine the singlet-triplet energy splitting.
AB - We observe the low-lying excitations of a molecular dimer formed by two electrons in a GaAs semiconductor quantum dot in which the number of confined electrons is tuned by optical illumination. By employing inelastic light scattering we identify the intershell excitations in the one-electron regime and the distinct spin and charge modes in the interacting few-body configuration. In the case of two electrons, a comparison with configuration-interaction calculations allows us to link the observed excitations with the breathing mode of the molecular dimer and to determine the singlet-triplet energy splitting.
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U2 - 10.1103/PhysRevLett.104.246802
DO - 10.1103/PhysRevLett.104.246802
M3 - Article
C2 - 20867322
AN - SCOPUS:77953695371
SN - 0031-9007
VL - 104
JO - Physical review letters
JF - Physical review letters
IS - 24
M1 - 246802
ER -