TY - JOUR
T1 - Ground state spin and Coulomb blockade peak motion in chaotic quantum dots
AU - Folk, J. A.
AU - Marcus, C. M.
AU - Berkovits, R.
AU - Kurland, I. L.
AU - Aleiner, I. L.
AU - Altshuler, B. L.
PY - 2001
Y1 - 2001
N2 - We investigate experimentally and theoretically the behavior of Coulomb blockade (CB) peaks in a magnetic field that couples principally to the ground-state spin (rather than the orbital moment) of a chaotic quantum dot. In the first part, we discuss numerically observed features in the magnetic field dependence of CB peak and spacings that unambiguously identify changes in spin S of each ground state for successive numbers of electrons on the dot, N. We next evaluate the probability that the ground state of the dot has a particular spin S, as a function of the exchange strength, J, and external magnetic field strength, B. In the second part, we describe recent experiments on gate-defined GaAs quantum dots in which Coulomb peak motion and spacing are measured as a function of in-plane magnetic field, allowing changes in spin between N and N + 1 electron ground states to be inferred.
AB - We investigate experimentally and theoretically the behavior of Coulomb blockade (CB) peaks in a magnetic field that couples principally to the ground-state spin (rather than the orbital moment) of a chaotic quantum dot. In the first part, we discuss numerically observed features in the magnetic field dependence of CB peak and spacings that unambiguously identify changes in spin S of each ground state for successive numbers of electrons on the dot, N. We next evaluate the probability that the ground state of the dot has a particular spin S, as a function of the exchange strength, J, and external magnetic field strength, B. In the second part, we describe recent experiments on gate-defined GaAs quantum dots in which Coulomb peak motion and spacing are measured as a function of in-plane magnetic field, allowing changes in spin between N and N + 1 electron ground states to be inferred.
UR - https://www.scopus.com/pages/publications/0035010191
U2 - 10.1142/9789812811004_0003
DO - 10.1142/9789812811004_0003
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AN - SCOPUS:0035010191
SN - 0281-1847
VL - 90
SP - 26
EP - 33
JO - Physica Scripta Topical Issues
JF - Physica Scripta Topical Issues
T2 - Nobel Symposium 116
Y2 - 13 June 2000 through 17 June 2000
ER -