TY - JOUR
T1 - Even-denominator fractional quantum Hall state in conventional triple-gated quantum point contact
AU - Hayafuchi, Yasuaki
AU - Konno, Ryota
AU - Noorhidayati, Annisa
AU - Fauzi, Mohammad Hamzah
AU - Shibata, Naokazu
AU - Hashimoto, Katsushi
AU - Hirayama, Yoshiro
N1 - Funding Information:
We thank K. Muraki and NTT for supplying high-quality GaAs 2D wafers, and M. Takahashi, M. F. Sahdan, K. Nagase, and K. Sato for their help in fabricating the device. K. H. acknowledges JSPS for financial support (KAKENHI 26390006, 17H02728). Y. Hi. acknowledges support from JSPS (KAKENHI 15H0587, 15K217270, and 18H01811). M. H. F., K. H., and Y. Hi. thank Tohoku University’s GP-Spin program for their support.
Publisher Copyright:
© 2022 The Author(s). Published on behalf of The Japan Society of Applied Physics by IOP Publishing Ltd.
PY - 2022
Y1 - 2022
N2 - The even-denominator states have attracted considerable attention owing to their possible applications in future quantum technologies. In this letter, we first report a 3/2 diagonal resistance, indicating the existence of a 3/2 state in a nanometer-sized triple-gated quantum point contact (QPC) fabricated on a high-mobility (not ultra-high-mobility) single-layer two-dimensional (2D) GaAs wafer. The center gate plays a crucial role in realizing the QPC's 3/2 state. Our observation of the 3/2 state using a conventional QPC device, which is a suitable building block for semiconductor quantum devices, paves a new path for the development of semiconductor-based quantum technologies.
AB - The even-denominator states have attracted considerable attention owing to their possible applications in future quantum technologies. In this letter, we first report a 3/2 diagonal resistance, indicating the existence of a 3/2 state in a nanometer-sized triple-gated quantum point contact (QPC) fabricated on a high-mobility (not ultra-high-mobility) single-layer two-dimensional (2D) GaAs wafer. The center gate plays a crucial role in realizing the QPC's 3/2 state. Our observation of the 3/2 state using a conventional QPC device, which is a suitable building block for semiconductor quantum devices, paves a new path for the development of semiconductor-based quantum technologies.
KW - even-denominator 3/2 state
KW - fractional quantum Hall effect
KW - quantum point contact
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U2 - 10.35848/1882-0786/ac4c35
DO - 10.35848/1882-0786/ac4c35
M3 - Article
AN - SCOPUS:85125654939
SN - 1882-0778
VL - 15
JO - Applied Physics Express
JF - Applied Physics Express
IS - 2
M1 - 025002
ER -