Zobrazeno 1 - 10
of 1 294
pro vyhledávání: '"Muraki, K."'
Autor:
Wakamura, T., Hashisaka, M., Hoshino, S., Bard, M., Okazaki, S., Sasagawa, T., Taniguchi, T., Watanabe, K., Muraki, K., Kumada, N.
Publikováno v:
Phys. Rev. Research 6, 013132 (2024)
We demonstrate gate-tunable giant field-dependent nonreciprocal transport (magnetochiral anisotropy) in a noncentrosymmetric superconductor $T_{\rm d}$-MoTe$_2$ in the thin limit. Giant magnetochiral anisotropy (MCA) with a rectification coefficient
Externí odkaz:
http://arxiv.org/abs/2303.09747
Autor:
Akiho, T., Muraki, K.
Publikováno v:
Phys. Rev. B 106, 075302 (2022)
We examine the impact of random potential due to remote impurites (RIs) and its in-situ controlled screening on fractional quantum Hall effects (FQHEs) around Landau-level filling factor $\nu = 1/2$. The experiment is made possible by using a dual-ga
Externí odkaz:
http://arxiv.org/abs/2203.14575
Publikováno v:
Phys. Rev. B 105, 075305 (2022)
We report the observation of fractional quantum Hall (FQH) effects in a two-dimensional electron gas (2DEG) confined to an InAs/AlGaSb quantum well, using a dual-gated Hall-bar device allowing for the independent control of the vertical electric fiel
Externí odkaz:
http://arxiv.org/abs/2112.05384
Publikováno v:
Phys. Rev. Materials 4, 104201 (2020)
We report transport measurements of strained InAs/In$_{x}$Ga$_{1-x}$Sb composite quantum wells (CQWs) in the quantum spin Hall phase, focusing on the control of the energy gap through structural parameters and an external electric field. For highly s
Externí odkaz:
http://arxiv.org/abs/2008.00664
Autor:
Kumada, N., Tu, N. -H., Sasaki, K. -i., Ota, T., Hashisaka, M., Sasaki, S., Onomitsu, K., Muraki, K.
Publikováno v:
Phys. Rev. B 101, 205205 (2020)
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 magnetoplasmons (EMPs) in InAs quantum Hall systems.We compare the EMPvelocity in th
Externí odkaz:
http://arxiv.org/abs/2006.01996
Publikováno v:
Phys. Rev. B 101, 075433 (2020)
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 measurements and eight-band $\mathbf{k\cdot p}$ calculations. Using di
Externí odkaz:
http://arxiv.org/abs/2002.12503
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 this coupling in terms of a momentum-dependent effective field and the re
Externí odkaz:
http://arxiv.org/abs/1902.05310
Publikováno v:
Phys. Rev. B 99, 121303 (2019)
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 edge channels arise from the Fermi-level pinning of InAs and the resultan
Externí odkaz:
http://arxiv.org/abs/1902.04290
Autor:
Srinivasan, A., Miserev, D. S., Hudson, K. L., Klochan, O., Muraki, K., Hirayama, Y., Reuter, D., Wieck, A. D., Sushkov, O. P., Hamilton, A. R.
Publikováno v:
Phys. Rev. Lett. 118, 146801 (2017)
We investigate the relationship between the Zeeman interaction and the inversion asymmetry induced spin orbit interactions (Rashba and Dresselhaus SOIs) in GaAs hole quantum point contacts. The presence of a strong SOI results in crossing and anti-cr
Externí odkaz:
http://arxiv.org/abs/1703.04233
Autor:
Srinivasan, A., Hudson, K. L., Miserev, D. S., Yeoh, L. A., Klochan, O., Muraki, K., Hirayama, Y., Sushkov, O. P., Hamilton, A. R.
Publikováno v:
Phys. Rev. B 94, 041406(R), 2016
Zeeman splitting of 1D hole subbands is investigated in quantum point contacts (QPCs) fabricated on a (311) oriented GaAs-AlGaAs heterostructure. Transport measurements can determine the magnitude of the g-factor, but cannot usually determine the sig
Externí odkaz:
http://arxiv.org/abs/1702.08135