Spin filling of a quantum dot derived from excited-state spectroscopy

Abstract

We study the spin filling of a semiconductor quantum dot using excited-state spectroscopy in a strong magnetic field. The field is oriented in the plane of the two-dimensional electron gas in which the dot is electrostatically defined. By combining the observation of Zeeman splitting with our knowledge of the absolute number of electrons, we are able to determine the ground state spin configuration for one to five electrons occupying the dot. For four electrons, we find a ground state spin configuration with total spin S=1, in agreement with Hund's first rule. The electron g-factor is observed to be independent of magnetic field and electron number.

11 pages, 7 figures, submitted to New Journal of Physics, focus issue on Solid State Quantum Information

References in corpus (3)

• Zeeman energy and spin relaxation in a one-electron quantum dot
• Semiconductor few-electron quantum dot operated as a bipolar spin filter
• Coherent rotations of a single spin-based qubit in a single quantum dot at fixed Zeeman energy

Cited by in corpus (5)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Semiconductor Spin Qubits
• Resonant tunnelling features in the transport spectroscopy of quantum dots
• Measuring the degeneracy of discrete energy levels using a GaAs/AlGaAs quantum dot
• Excited-state spectroscopy on a quantum dot side-coupled to a quantum wire