Article
Physics, Multidisciplinary
Si-De Song, Guo-Zhu Liu, Qi He, Xiang Gu, Gen-Shen Hong, Jian-Wei Wu
Summary: The combined effects of cycling endurance and radiation on floating gate memory cell were investigated, and the results obtained are as follows: (i) Programmed flash cells with a certain number of prior cycles exhibit smaller threshold voltage shift in response to radiation compared to those without prior cycles, which is mainly attributed to the recombination of trapped electrons (introduced by cycling stress) and trapped holes (introduced by irradiation) in the oxide surrounding the floating gate. (ii) Radiation-induced transconductance degradation is more severe in prior cycled flash cells than in cells without cycling stress in both programmed and erased states. (iii) Radiation is more likely to cause interface generation in the programmed state than in the erased state.
Article
Engineering, Electrical & Electronic
Kazunori Hasegawa, Kai Takagi
Summary: This letter discusses the impact of the reverse-recovery current of a PIN diode on the surge and gate-noise voltages of an insulated-gate bipolar transistor (IGBT) in an inverter. Theoretical analysis reveals that factors such as di/dt, switching speed, and parasitic inductances influence the gate-noise voltage differently compared to a Schottky barrier diode. Moreover, the analysis suggests that the surge voltage may not occur at increased dc voltage, even though it is prominent at low dc voltage regions. A 1-kV testing setup was constructed and verified the validity of the theoretical analysis using a 1.7-kV 260-A IGBT module.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Lukasz Ciura, Jaroslaw Wrobel, Jacek Boguski, Jerzy Wrobel
Summary: This article demonstrates the use of the coherence function to analyze 1/f noise sources in a planar semiconductor structure with multiple electrical contacts. The study includes noise and coherence function measurements, the development of a 1/f noise model for the sample, theoretical calculations of the coherence function, and a comparison of theoretical and experimental values. The results show that the model, which assumes no 1/f noise from the bulk semiconductor and only 1/f noise from contacts, can effectively explain the experimental measurements of coherence. This method provides a straightforward interpretation and avoids the need for complex model parameters, unlike models based solely on power spectral density.
Article
Physics, Multidisciplinary
Jacob F. Steiner, Larissa Melischek, Martina Trahms, Katharina J. Franke, Felix von Oppen
Summary: In this study, a theory for diodelike effects in the switching and retrapping currents of weakly damped Josephson junctions is developed. It is found that the diodelike behavior of switching currents is rooted in asymmetric current-phase relations, while nonreciprocal retrapping currents originate in asymmetric quasiparticle currents. These different origins also imply distinctly different symmetry requirements.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Ang Hu, Dongsheng Liu, Zirui Jin, Mengming Zhang, Xiaoyu Shan, Xuecheng Zou
Summary: This letter presents two RF CMOS voltage-controlled oscillators with source damping resistors to suppress 1/f noise up-conversion. The effects of the source damping resistors on the two phases were analyzed based on important parameters, leading to the design of two VCO prototypes. The VCOs achieved significant frequency tuning range and performed well in terms of phase noise at different output frequencies.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Zhiming Yu, Xinpei Duan, Sen Zhang, Jun Lin, Wanhan Su, Guoli Li, Xingqiang Liu, Lei Liao
Summary: In this study, a dual-gated MoS2 transistor with an omega-shaped gate architecture based on silver nanowires as buried gate is fabricated. The transistor shows excellent electrical performance and gate control, leading to the successful fabrication of an inverter circuit and a NAND gate circuit with high voltage gain and noise margin.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Xiaoming Liu, Jing Jin, Chao Yang, Yuan Liu, Jianjun Zhou
Summary: A 12GHz transformer feedback VCO with noise circulation is proposed in this letter, achieving excellent phase noise performance and low power consumption. Experimental results demonstrate broad frequency tuning range and high figure of merit.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Optics
Kirill A. Kazakov
Summary: Quantum indeterminacy sets a lower bound on the power spectrum of voltage fluctuations, with a low-frequency asymptotic similar to 1/f and a modified behavior of 1/f^gamma due to charge-carrier-phonon interaction. The voltage variance grows with time as t(gamma-1), and the power spectrum remains well defined and finite for gamma < 2.
Article
Multidisciplinary Sciences
Martina Trahms, Larissa Melischek, Jacob F. Steiner, Bharti Mahendru, Idan Tamir, Nils Bogdanoff, Olof Peters, Gael Reecht, Clemens B. Winkelmann, Felix von Oppen, Katharina J. Franke
Summary: We investigate the ultimate limits of miniaturization by creating atomic-scale Pb-Pb Josephson junctions in a scanning tunnelling microscope. Non-reciprocal supercurrents emerge when inserting a single magnetic atom into the junction, with the preferred direction depending on the atomic species. Our results open new avenues for creating atomic-scale Josephson diodes and tuning their properties through single-atom manipulation.
Article
Chemistry, Multidisciplinary
Sebastian Pazos, Wenwen Zheng, Tommaso Zanotti, Fernando Aguirre, Thales Becker, Yaqing Shen, Kaichen Zhu, Yue Yuan, Gilson Wirth, Francesco Maria Puglisi, Juan Bautista Roldan, Felix Palumbo, Mario Lanza
Summary: The development of the internet-of-things requires cheap and reliable true random number generator (TRNG) circuits for data encryption. However, existing solutions consume too much power and hinder integration. This study presents a TRNG circuit using stable random telegraph noise (RTN) signals produced by h-BN memristors, enabling a highly-stochastic and high-throughput signal even with interruptions.
Article
Engineering, Electrical & Electronic
Jinwook Kuk, Seonghearn Lee
Summary: The gate-bulk/body voltage V-gb-dependent effect of the source or drain-bulk/body junction capacitance C-j in bulk/PD-SOI MOSFETs is physically revealed in this study. This V-gb-dependent C-j is accurately extracted from measured S-parameters and newly modeled in a wide off-bias range. A geometry-dependent model and parameter extraction method are proposed to make the new C-j model applicable in SPICE.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Multidisciplinary Sciences
Masahiro Morikawa, Akika Nakamichi
Summary: We propose a simple model for the origin of pink noise based on waves with accumulating frequencies, which arise spontaneously in systems with synchronization, resonance, and infrared divergence. This beat mechanism, understood as amplitude modulation, can produce pink noise after the demodulation process in various fields, unrelated to dissipation or long-time memory. We also suggest new perspectives on pink noise in earthquakes, solar flares, and stellar activities.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Xiao Xue, Maximilian Russ, Nodar Samkharadze, Brennan Undseth, Amir Sammak, Giordano Scappucci, Lieven M. K. Vandersypen
Summary: In this study, a spin-based quantum processor in silicon with high gate fidelities for single-qubit and two-qubit gates was reported. The gate fidelities were above 99.5%, and the processor was used to calculate molecular ground-state energies with high accuracy. The breakthrough in achieving a two-qubit gate fidelity above 99% positions semiconductor qubits for fault tolerance and potential applications in the era of noisy intermediate-scale quantum devices.
Article
Chemistry, Multidisciplinary
Masahiro Kamada, Antti Laitinen, Weijun Zeng, Marco Will, Jayanta Sarkar, Kirsi Tappura, Heikki Seppa, Pertti Hakonen
Summary: The study found that adsorbed O-2 molecules contribute significantly to flux noise in superconducting quantum interference devices, while 1/f(gamma) noise is caused by surface diffusion of Ne atoms and temporary formation of Ne clusters.
Article
Multidisciplinary Sciences
Tao Ma, Lei Wang, Anping Chai, Chao Liu, Wenqiang Cui, Shuguang Yuan, Shannon Wing Ngor Au, Liang Sun, Xiaokang Zhang, Zhenzhen Zhang, Jianping Lu, Yuanzhu Gao, Peiyi Wang, Zhifang Li, Yujie Liang, Horst Vogel, Yu Tian Wang, Daping Wang, Kaige Yan, Huawei Zhang
Summary: ClC-2 is a chloride ion transporter protein that plays a critical role in cellular homeostasis. Dysfunction of ClC-2 is involved in diseases such as leukodystrophy and primary aldosteronism. AK-42 has been reported as a specific inhibitor of ClC-2, but its inhibition mechanism is still unclear.
NATURE COMMUNICATIONS
(2023)