Zobrazeno 1 - 10
of 115
pro vyhledávání: '"Onomitsu, Koji"'
Publikováno v:
Nature Communications 9, (2018) 1331
The ability to manipulate phonon waveforms in continuous media has attracted significant research interest and is crucial for practical applications ranging from biological imaging to material characterization. Although several spatial focusing techn
Externí odkaz:
http://arxiv.org/abs/1703.02249
Publikováno v:
Scientific Reports 7, 12745 (2017)
The high-quality-factor mechanical resonator in electromechanical systems has facilitated dynamic control of phonons via parametric nonlinear processes and paved the development of mechanical logic-elements. However the resonating element with a narr
Externí odkaz:
http://arxiv.org/abs/1612.04491
Autor:
Akiho, Takafumi, Couëdo, François, Irie, Hiroshi, Suzuki, Kyoichi, Onomitsu, Koji, Muraki, Koji
Publikováno v:
Appl. Phys. Lett. 109, 192105 (2016)
Quantum spin Hall insulators (QSHIs), also known as two-dimensional topological insulators, have emerged as an unconventional class of quantum states with insulating bulk and conducting edges originating from nontrivial inverted band structures, and
Externí odkaz:
http://arxiv.org/abs/1608.06751
Publikováno v:
Phys. Rev. B 94, 035301 (2016)
We report transport measurements in a single edge channel of an InAs/GaSb quantum spin Hall insulator, where the conduction occurs through only one pair of counterpropagating edge modes. By using a specific sample design involving highly asymmetric c
Externí odkaz:
http://arxiv.org/abs/1606.01710
Publikováno v:
Phys. Rev. B 91, 245309 (2015)
We report a gate-controlled transition of a semimetallic InAs/GaSb heterostructure to a topological insulator. The transition is induced by decreasing the degree of band inversion with front and back gate voltages. Temperature dependence of the longi
Externí odkaz:
http://arxiv.org/abs/1506.05971
Publikováno v:
New Journal of Physics, 17, 113032 (2015)
The phonon propagation dynamics in a phononic crystal waveguide, realized via a suspended one-dimensional membrane array with periodic air holes, is investigated as function of its geometry. The bandstructure of the phononic crystal can be engineered
Externí odkaz:
http://arxiv.org/abs/1502.04855
Publikováno v:
Nature Nanotechnology 9, 520-524 (2014)
Nanoelectromechanical systems (NEMS), utilising localised mechanical vibrations, were pioneered for sensors, signal processors and to study macroscopic quantum mechanics. Increasingly the concept of integrating multiple mechanical elements via electr
Externí odkaz:
http://arxiv.org/abs/1401.5573
Publikováno v:
Phys. Rev. B 87, 235311 (2013)
Transport in InAs/GaSb heterostructures with different InAs layer thicknesses is studied using a six-terminal Hall bar geometry with a 2-$\mu$m edge channel length. For a sample with a 12-nm-thick InAs layer, non-local resistance measurements with va
Externí odkaz:
http://arxiv.org/abs/1306.4234
Autor:
Okamoto, Hajime, Gourgout, Adrien, Chang, Chia-Yuan, Onomitsu, Koji, Mahboob, Imran, Chang, Edward Yi, Yamaguchi, Hiroshi
Coupled mechanical oscillations were first observed in paired pendulum clocks in the mid-seventeenth century and were extensively studied for their novel sympathetic oscillation dynamics. In this era of nanotechnologies, coupled oscillations have aga
Externí odkaz:
http://arxiv.org/abs/1212.3097
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