360 citations · 933 across the 13 of their papers we have counts for
14 papers
Energy gap tuning and gate-controlled topological phase transition in InAs/InGaSb composite quantum wells
H. Irie, T. Akiho, F. Couëdo +3
We report transport measurements of strained InAs/InGaSb composite quantum wells (CQWs) in the quantum spin Hall phase, focusing on the control of the energy gap thro…
Suppression of Gate Screening on Edge Magnetoplasmons by Highly Resistive ZnO Gate
N. Kumada, N. -H. Tu, K. -i. Sasaki +5
We investigate a way to suppress high-frequency coupling between a gate and low-dimensional electron systems in the gigahertz range by measuring the velocity of edge magnetoplasmon…
Impact of epitaxial strain on the topological-nontopological phase diagram and semimetallic behavior of InAs/GaSb composite quantum wells
H. Irie, T. Akiho, F. Couëdo +4
We study the influence of epitaxial strain on the electronic properties of InAs/GaSb composite quantum wells (CQWs), host structures for quantum spin Hall insulators, by transport…
Counterflowing edge current and its equilibration in quantum Hall devices with sharp edge potential: Roles of incompressible strips and contact configuration
T. Akiho, H. Irie, K. Onomitsu +1
We report the observation of counterflowing edge current in InAs quantum wells which leads to the breakdown of quantum Hall (QH) effects at high magnetic fields. Counterflowing edg…
Pseudospin Berry phase as a signature of nontrivial band topology in a two-dimensional system
F. Couëdo, H. Irie, T. Akiho +3
Electron motion in crystals is governed by the coupling between crystal momentum and internal degrees of freedom such as spin implicit in the band structure. The description of thi…
Broadband reconfigurable logic gates in phonon waveguides
Daiki Hatanaka, Tom Darras, Imran Mahboob +2
The high-quality-factor mechanical resonator in electromechanical systems has facilitated dynamic control of phonons via parametric nonlinear processes and paved the development of…