Transport properties of a quantum dot in quantum Hall regimes probed by a single-electron transistor

Chen, J. C.; Li, Ming-Yang; Ueda, T.; Komiyama, S.
June 2009
Applied Physics Letters;6/8/2009, Vol. 94 Issue 23, p232109
Academic Journal
Coulomb blockade oscillations in a semiconductor quantum dot (QD) with two confined Landau levels are investigated by probing a current through a single-electron transistor (SET) fabricated directly on top of the QD. The intradot tunneling events between the compressible regions in the dot are mapped out by measuring SET currents. Our results demonstrate that a SET can be an excellent electrometer that is extremely responsive to the local individual electron tunneling events in a closed electronic system.


Related Articles

  • Anisotropic Magnetotransport near the Bilayer ν = 2/3 Quantum Hall State. Morino, Masayuki; Iwata, Kazuki; Suzuki, Michiro; Fukuda, Akira; Sawada, Anju; Ezawa, Zyun F.; Kumada, Norio; Hirayama, Yoshiro // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p1335 

    We study a magnetotransport anisotropy of a bilayer electron system at the Landau level filling factor ν = 2/3 under tilted magnetic fields. When the direction of the applied in-plane component of magnetic fields with respect to the current is altered, an anisotropy appears only when the...

  • Breakdown of the Quantum Hall Regime in a 'Confined' Graphene. Yoshifumi Morita // Advances in Science & Technology;2013, Vol. 77, p276 

    Our focus is on the graphene under a magnetic field with Landau levels i.e. quantum Hall regime where a 'confining potential' is imposed by a finite electric field. In our theory, the graphene is modelled by a conventional fermion on a honeycomb lattice and the finite electric field is by a...

  • Electrometry using the quantum Hall effect in a bilayer two-dimensional electron system. Ho, L. H.; Taskinen, L. J.; Micolich, A. P.; Hamilton, A. R.; Atkinson, P.; Ritchie, D. A. // Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p212102 

    We discuss the development of a sensitive electrometer that utilizes a two-dimensional electron gas (2DEG) in the quantum Hall regime. As a demonstration, we measure the evolution of the Landau levels in a second, nearby 2DEG as the applied perpendicular magnetic field is changed, and extract an...

  • Observation of excited states in a graphene quantum dot. Schnez, S.; Molitor, F.; Stampfer, C.; Güttinger, J.; Shorubalko, I; Ihn, T.; Ensslin, K. // Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p012107 

    We demonstrate that excited states in single-layer graphene quantum dots can be detected via direct transport experiments. Coulomb diamond measurements show distinct features of sequential tunneling through an excited state. Moreover, the onset of inelastic cotunneling in the diamond region...

  • Quantum Hall Effect—Insulator Transition in the InAs / GaAs System with Quantum Dots. Kul’bachinskiı, V. A.; Lunin, R. A.; Rogozin, V. A.; Golikov, A. V.; Kytin, V. G.; Zvonkov, B. N.; Nekorkin, S. M.; Filatov, D. O.; de Visser, A. // Physics of the Solid State;Apr2003, Vol. 45 Issue 4, p762 

    The InAs / GaAs structures consisting of quantum-dot layers with electronic properties typical of two-dimensional systems are investigated. It is found that, at a low concentration of charge carriers, the variable-range-hopping conductivity is observed at low temperatures. The localization...

  • Measuring interactions between tunnel-coupled quantum dots in the quantum Hall regime. Livermore, C.; Duncan, D.S. // Journal of Applied Physics;10/1/1999, Vol. 86 Issue 7, p1043 

    Presents information on a study which presented measurements of the relaxation of frustrated charge configurations via tunneling in a double quantum dot in the quantum Hall regime. Measurement of double dot conductance; Observation on residual interaction energy.

  • Landau level formation in semiconductor quantum dots in a high magnetic field. Nomura, S.; Samuelson, L. // Applied Physics Letters;10/20/1997, Vol. 71 Issue 16, p2316 

    Observes Landau level formations in the photoluminescence spectra of indium phosphide strained quantum dots (QD) in a high magnetic field. Investigation of the magneto-optical effects in QD; Growth of QD by low-pressure metalorganic vapor phase epitaxy; Factors attributing the evolution of...

  • Optical transitions and cyclotron resonance at Landau levels split by a periodic potential. Demikhovskiı, V. Ya.; Perov, A. A. // Journal of Experimental & Theoretical Physics;Nov98, Vol. 87 Issue 5, p973 

    The structure of the electron spectrum is investigated and selection rules are found for transitions between magnetic subbands in a surface 2D superlattice of quantum dots in a perpendicular magnetic field. The photon absorption probabilities are calculated, and the profiles of the absorption...

  • Landau Problem and Laughlin Wave Function. Jana, Debnarayan // IUP Journal of Physics;Oct2010, Vol. 3 Issue 4, p7 

    In this pedagogical article, we would like to discuss the basic aspects of Laughlin wave function and its implication for material science and condensed matter physics. The famous Landau problem of single charged particle in a uniform magnetic field has been reviewed in various gauges such as...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics