Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Chung, Yunchul"'
Autor:
Jung, Hwanchul, Park, Dongsung T., Lee, Seokyeong, Kim, Uhjin, Yang, Chanuk, Kim, Jehyun, Umansky, V., Kim, Dohun, Sim, H. -S., Chung, Yunchul, Choi, Hyoungsoon, Choi, Hyung Kook
Publikováno v:
Nat Commun 14, 415 (2023)
The resemblance between electrons and optical waves has strongly driven the advancement of mesoscopic physics. However, electron waves have yet to be understood in open cavity structures which have provided contemporary optics with rich insight towar
Externí odkaz:
http://arxiv.org/abs/2303.08386
Autor:
Park, Dongsung T., Lee, Seokyeong, Kim, Uhjin, Chung, Yunchul, Choi, Hyoungsoon, Choi, Hyung Kook
Spatial aspects in quantum mechanics are often difficult to model in geometrically intricate settings that are typical of mesoscopic physics. In such cases, predicting the device behaviors is a vital but difficult challenge. Transverse magnetic focus
Externí odkaz:
http://arxiv.org/abs/2005.13841
Autor:
Park, Dongsung T., Kim, Dongkun, Kim, Uhjin, Jung, Hwanchul, Choi, Juho, Han, Cheolhee, Chung, Yunchul, Sim, H. -S., Umansky, V., Choi, Hyoungsoon, Choi, Hyung Kook
Publikováno v:
Phys. Rev. Research 3, 033015 (2021)
Through a series of transverse magnetic focusing experiments, we show that hot electrons in a two-dimensional electron gas system undergo an ultrafast relaxation when generated by a quantum dot (QD) instead of a quantum point contact (QPC). We find h
Externí odkaz:
http://arxiv.org/abs/2004.11007
Autor:
Jang, Wonjin, Kim, Jehyun, Cho, Min-Kyun, Chung, Hwanchul, Park, Sanghyeok, Eom, Jaeun, Umansky, Vladimir, Chung, Yunchul, Kim, Dohun
Publikováno v:
npj Quantum Information 6, 64 (2020)
Fast and high-fidelity quantum state detection is essential for building robust spin-based quantum information processing platforms in semiconductors. The Pauli spin blockade (PSB)-based spin-to-charge conversion and its variants are widely used for
Externí odkaz:
http://arxiv.org/abs/1912.02355
Autor:
Jang, Wonjin, Cho, Min-Kyun, Lee, Myungwon, Hong, Changki, Kim, Jehyun, Jung, Hwanchul, Chung, Yunchul, Umansky, Vladimir, Kim, Dohun
Publikováno v:
Appl. Phys. Lett. 114, 242102 (2019)
We report raster scan multiplexed charge-stability diagram measurements for tuning multiple gate-defined quantum dots in GaAs/AlGaAs heterostructures. We evaluate the charge sensitivity of the quantum point contact (QPC) in both radio frequency (rf)-
Externí odkaz:
http://arxiv.org/abs/1907.00562
Autor:
Hong, Changki, Yoo, Gwangsu, Park, Jinhong, Cho, Min-Kyun, Chung, Yunchul, Sim, H. -S., Kim, Dohun, Choi, Hyungkook, Umansky, Vladimir, Mahalu, Diana
Publikováno v:
Phys. Rev. B 97, 241115(R), 2018
Electron pairing due to a repulsive Coulomb interaction in a triple quantum dot (TQD) is experimentally studied. It is found that electron pairing in two dots of a TQD is mediated by the third dot, when the third dot strongly couples with the other t
Externí odkaz:
http://arxiv.org/abs/1807.08641
Autor:
Ahn, Ye-Hwan, Chung, Yunchul
Publikováno v:
Journal of Applied Physics 122, 054303 (2017)
The quantized current generated by a quantum dot pump is calculated numerically. The numerical simulation is done by dividing the time varying potential into many static potentials with a short time interval and calculating the electron capture and p
Externí odkaz:
http://arxiv.org/abs/1801.04733
Publikováno v:
Phys. Rev. B 96, 205431(2017)
Transmission through a quantum point contact (QPC) in the quantum Hall regime usually exhibits multiple resonances as a function of gate voltage and high nonlinearity in bias. Such behavior is unpredictable and changes sample by sample. Here, we repo
Externí odkaz:
http://arxiv.org/abs/1712.03551
Akademický článek
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Autor:
Kretinin, Andrey V., Chung, Yunchul
Publikováno v:
Rev. Sci. Instrum. 83, 084704 (2012)
A wide-band current preamplifier based on a composite operational amplifier is proposed. It has been shown that the bandwidth of the preamplifier can be significantly increased by enhancing the effective open-loop gain of the composite preamplifier.
Externí odkaz:
http://arxiv.org/abs/1204.2239