[Japanese|English]
量子固体物性研究グループでは、電子がもつ波動性や重ね合わせ、スピンといった量子力学的性質に加え、電子間の相互作用によって生じる多体効果や相関効果に注目し、 それらを半導体や原子層物質のへテロ構造・ナノ構造を用いて生成・制御することで、ばらばらの電子では得られない新しい機能をもった量子デバイスや極限的な量子計測技術を開拓することを目指しています．
Topological insulators are characterized by spin-polarized edge states that have possible applications for spintronics and quantum computation. We engineer an electrically tunable topological insulator using semiconductor heterostructures.
Graphene has potential advantages for photo-detector and plasmonic applications. We investigate ultra-fast dynamics of charge carriers excited by femto-second laser pulses or high-frequency electric field.
Quasiparticles in fractional quantum Hall states have fractional charge and anyonic statistics. For particular states, they may obey non-Abelian statistics that provide the basis of fault-tolerant quantum computation.
Quantum-Hall edge states serve as ideal one-dimensional channels where one can study quantum electron optics and many-body physics such as Tomonaga-Luttinger liquid.
We demonstrate a highly gate-tunable spin-orbit interaction in a gate-all-around semiconductor nanowire field-effect transistor.
We use a scanning probe to assemble and characterize artificial nanostructures controlled at atomistic levels.