Article
Nanoscience & Nanotechnology
S. Aqiqi, C. A. Duque, A. Radu, J. A. Vinasco, D. Laroze
Summary: The influence of tunneling effect on intersubband optical absorption and refraction in gallium arsenide quantum well wire in transverse electric field is investigated. Carrier tunneling results in broadening of electronic linewidth, especially under intense electric fields. Increase in electric field causes blue-shift in absorption peaks along with enlargement and decrease in amplitude.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Chemistry, Physical
Jing Meng, Xinwei Feng, Cuimei Cao, Yali Xie, Dongmei Jiang, Yang Xu, Tian Shang, Qingfeng Zhan
Summary: In this study, exchange biased (001)-textured IrMn/epitaxial FeGa bilayers were grown on a ferroelectric PMN-PT(001) substrate with the assistance of an MgO buffer layer. The electric control of magnetic behaviors was investigated. It was found that the combined effect of intrinsic magnetocrystalline anisotropy and collinear uniaxial and unidirectional magnetic anisotropies resulted in square, asymmetrically shaped, and two-step loops at different magnetic field orientations. After being polarized by an electric field, asymmetrically shaped loops with three steps in the descending and two steps in the ascending branch were additionally observed, indicating enhanced uniaxial magnetic anisotropy perpendicular to the exchange bias. The angular dependent magnetic behavior suggested a slight rotation of the exchange bias by electrically induced strain. The electric field dependence of coercive field and uniaxial magnetic anisotropy exhibited an asymmetrical butterfly-like shape, indicating a strain-mediated magnetoelectric coupling with a net 109 degrees polarization switching of PMN-PT.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Physics, Fluids & Plasmas
B. Trotabas, R. Gueroult
Summary: The benefits of thermionic emission from negatively biased electrodes in a magnetized plasma are examined in terms of its effects on the sheath and plasma potential variation along magnetic field lines. It is found that thermionic emission can improve control over the plasma potential at the sheath edge, but it also leads to an increase of the plasma potential drop along magnetic field lines.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Lujun Wei, Pai Liu, Jincheng Peng, Zheng Zhou, Feng Li, Fei Huang, Yanghui Li, Xiaodan Chi, Yan Xing, Ruobai Liu, Jiarui Chen, Jiaju Yang, Wei Zhang, Qingyu Xu, Jun Du, Yong Pu
Summary: This paper proposes a simple method of electric field control of magnetization reversal and successfully implements it on a Co/IrMn bilayer with doubly exchange bias. The method involves generating tensile strain on a ferroelectric substrate using a specially designed magnetic field. Multiple magnetic states can be controlled by the electric field in this unique system. This work is of great significance for the manufacturing of low-energy magnetic storage memory devices.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Physics, Applied
Krzysztof Grochot, Lukasz Karwacki, Stanislaw Lazarski, Witold Skowronski, Jaroslaw Kanak, Wieslaw Powroznik, Piotr Kuswik, Mateusz Kowacz, Feliks Stobiecki, Tomasz Stobiecki
Summary: This study investigates magnetization switching induced by spin-orbit torque in W (Pt)/Co/NiO heterostructures. The research demonstrates deterministic Co magnetization switching without the need for an external magnetic field, instead using an in-plane exchange-bias field. The effective spin Hall angle in the W-based system is found to be higher than in the Pt-based system, resulting in a higher relative difference in resistance states during magnetization current switching.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Multidisciplinary
Yuki Kobayashi, Christian Heide, Amalya C. Johnson, Vishal Tiwari, Fang Liu, David A. Reis, Tony F. Heinz, Shambhu Ghimire
Summary: Interactions between quantum materials and strong laser fields can result in non-equilibrium electronic states. Monolayer transition metal dichalcogenides, as direct-gap semiconductors with quantum confinement, offer opportunities for controlling excitons. However, characterizing strong-field driven exciton dynamics has been challenging.
Article
Physics, Applied
Min Hu, Hailong Wang, Qian Gong
Summary: The hydrogen donor impurity states were calculated in In0.65Ga0.35As0.75P0.25/InP coaxial double quantum well wires using the plane wave method within the theoretical framework of effective mass envelope function approximation. The binding energies and transition energies of impurity states were obtained as functions of impurity position, distance between the inner and outer quantum wires, magnetic and electric field strengths. The effects of quantum wire thickness and distance between quantum wires on impurity states were analyzed in detail, with differential impacts of electric and magnetic fields on the binding energy of impurity states observed depending on the impurity position.
MODERN PHYSICS LETTERS B
(2021)
Article
Chemistry, Physical
Min Zhang, Faying Li, Daniele Benetti, Riad Nechache, Qin Wei, Xiwei Qi, Federico Rosei
Summary: This study successfully synthesized a hybrid ferroelectric-semiconducting TiO2 system as a photoanode, sensitized with QDs to enhance light absorption, resulting in remarkable performance enhancement. By using engineered QDs with a gradient interface, high photocurrent density and charge separation efficiency were achieved.
Article
Physics, Condensed Matter
S. A. Safwan, Nagwa El Meshad
Summary: This study calculated the binding energies of negative (D-) and neutral (D0) donor impurities in a parabolic cylindrical quantum dot (CQD) under the influence of a lateral electric field using the single-band effective mass approximation and quantum variational method. The stability of D- and D0 was discussed based on the calculated binding energies. The study also investigated the static dipole polarizability (SDP) of the CQD in response to the lateral electric field strength, revealing the influence of CQD size, lateral electric field strength, and direction on the polarizability.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Bonan Han, Yanping Chen, Tianhao Xia, Linzheng Wang, Chen Wang, Zhengming Sheng
Summary: This paper proposes a measurement scheme for the diagnosis of radially polarized terahertz (THz) radiation. The amplitude and spectrum of the THz beam can be modulated by introducing a movable metal mask. It has been demonstrated that the amplitude and spectrum of the radially polarized THz radiation can be manipulated by controlling the strength and the location of the dc-biased field.
Article
Nanoscience & Nanotechnology
Stijn Jooken, Yovan de Coene, Olivier Deschaume, Daniel Zambo, Tangi Aubert, Zeger Hens, Dirk Dorfs, Thierry Verbiest, Koen Clays, Geert Callewaert, Carmen Bartic
Summary: The research demonstrates that the electric field sensitivity of fluorescence intensity of type-I and quasi-type-II quantum dots and quantum rods is enhanced under two-photon excitation, allowing them to track fast switching E-fields. This suggests the potential of semiconductor nanoparticles as cellular voltage probes in multiphoton imaging.
Article
Chemistry, Multidisciplinary
Kazuyuki Kuroyama, Jinkwan Kwoen, Yasuhiko Arakawa, Kazuhiko Hirakawa
Summary: This study demonstrates electrical access to an ultrastrongly coupled system by fabricating a gate-defined quantum point contact near a terahertz split-ring resonator. The observed photocurrent spectrum with significant anticrossing is attributed to coupling between the cyclotron resonance of the two-dimensional electrons and the resonator. The photocurrent signal is explained by energy-selective transmission/reflection of the quantum Hall edge channels at the quantum point contact.
Article
Chemistry, Multidisciplinary
Zheng-Yang Huo, Yuxin Yang, Jang-Mook Jeong, Xiaoxiong Wang, He Zhang, Mingdeng Wei, Keren Dai, Peixun Xiong, Sang-Woo Kim
Summary: A self-powered water disinfection system, driven by triboelectric nano generators, is presented for efficient water disinfection in rural and disaster-stricken areas lacking power supplies. The system utilizes a flow-driven TENG to generate electricity and a metal-organic framework nanowire array for H2O2 generation and electroporation. The prototype achieves complete disinfection over a wide range of flows with low water flow thresholds, offering promising potential for pathogen control.
Article
Physics, Applied
Pengfei Liu, Qi Liu, Zedong Xu, Shizhe Wu, Kaiyou Wang
Summary: The Ta/Pt/Co/Pt multilayers grown on different-phase BFO exhibit different magnetic switching behavior, with steplike AHE switching observed on the mixed-phase BFO layers, providing a potential avenue for spintronic devices based on mixed-phased BFO.
APPLIED PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Youdi Gu, Cheng Song, Qian Wang, Weijin Hu, Wei Liu, Feng Pan, Zhidong Zhang
Summary: Voltage control of magnetism has been found as an efficient way to improve energy efficiency in spintronic devices. Recent research has focused on voltage-induced changes in magnetism, particularly by the magneto-ionic effect, in ferroic oxide heterostructures and magnetic metal-based systems. Challenges and future aspects of magneto-ionics are also discussed for further studies and practical applications.
