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Quantum Dots/Nanowire
We investigate single-electron transport, correlated transport, and time-dependent phenomena in quantum dots (GaAs, Si, carbon based molecules, etc.). We are developing quantum information technology based on electron charge and spin.
Figure: Correlated Coherent Oscillations in Coupled Semiconductor Charge Qubits
[Phys. Rev. Lett. 103, 056802 (2009)].
Two-Dimensional System
We investigate many-body effects in two-dimensional systems, particularly in quantum Hall systems, formed in GaAs/AlGaAs or Si/SiO2 heterostructures and in graphene by transport or nuclear spin measurements.
Figure: Spin polarization in a high-mobility GaAs/AlGaAs QH system detected by NMR [Science 335, 828 (2012)].
Low-Temperature Nanoprobe
We study low-dimensional carrier systems through the characterization of semiconductor heterostructures and the clean surfaces using low-temperature STM and STS. We also carry out single-atom manipulation on semiconductor surfaces.
Figure: STM image of ''NTT'' made by In adatoms on InAs surface [Appl. Phys. Express 4, 085002 (2011)].
3-1 Morinosato-Wakamiya, Atugi, Kanagawa 243-0198, Japan
Qauntum Solid State Physics Research Group
NTT Basic Research Laboratories
NTT