TY - JOUR
T1 - Spin and orbital structure of the first six holes in a silicon metal-oxide-semiconductor quantum dot
AU - Liles, S. D.
AU - Li, R.
AU - Yang, C. H.
AU - Hudson, F. E.
AU - Veldhorst, M.
AU - Dzurak, Andrew S.
AU - Hamilton, A. R.
PY - 2018/12
Y1 - 2018/12
N2 - Valence band holes confined in silicon quantum dots are attracting significant attention for use as spin qubits. However, experimental studies of single-hole spins have been hindered by challenges in fabrication and stability of devices capable of confining a single hole. To fully utilize hole spins as qubits, it is crucial to have a detailed understanding of the spin and orbital states. Here we show a planar silicon metal-oxide-semiconductor-based quantum dot device and demonstrate operation down to the last hole. Magneto-spectroscopy studies show magic number shell filling consistent with the Fock–Darwin states of a circular two-dimensional quantum dot, with the spin filling sequence of the first six holes consistent with Hund’s rule. Next, we use pulse-bias spectroscopy to determine that the orbital spectrum is heavily influenced by the strong hole–hole interactions. These results provide a path towards scalable silicon hole-spin qubits.
AB - Valence band holes confined in silicon quantum dots are attracting significant attention for use as spin qubits. However, experimental studies of single-hole spins have been hindered by challenges in fabrication and stability of devices capable of confining a single hole. To fully utilize hole spins as qubits, it is crucial to have a detailed understanding of the spin and orbital states. Here we show a planar silicon metal-oxide-semiconductor-based quantum dot device and demonstrate operation down to the last hole. Magneto-spectroscopy studies show magic number shell filling consistent with the Fock–Darwin states of a circular two-dimensional quantum dot, with the spin filling sequence of the first six holes consistent with Hund’s rule. Next, we use pulse-bias spectroscopy to determine that the orbital spectrum is heavily influenced by the strong hole–hole interactions. These results provide a path towards scalable silicon hole-spin qubits.
UR - http://resolver.tudelft.nl/uuid:8d9d51ed-50fe-43cc-9f85-f6356b9e17d3
UR - http://www.scopus.com/inward/record.url?scp=85051678436&partnerID=8YFLogxK
U2 - 10.1038/s41467-018-05700-9
DO - 10.1038/s41467-018-05700-9
M3 - Article
AN - SCOPUS:85051678436
SN - 2041-1723
VL - 9
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3255
ER -