Article
Materials Science, Multidisciplinary
Suman Jyoti De, Udit Khanna, Sumathi Rao, Sourin Das
Summary: We investigated the effects of introducing a boost at the proximitized helical edge of a 2D quantum spin Hall insulator and found that a FFLO superconducting phase may emerge when the boost is larger than a critical value tied to the induced pairing gap. Unlike previous studies on one-dimensional models, our boundary FFLO state supports both finite magnetization and current, which have implications for the treatment of the ultraviolet cutoff in one-dimensional helical edge models.
Article
Materials Science, Multidisciplinary
K. Kronfeldner, T. Baturina, C. Strunk
Summary: This study measured the magnetoresistance of a TiN thin film close to the disorder-driven superconductor-insulator transition, identifying three distinct crossing points in magnetic fields at different temperatures. The evolution of these crossing points near the transition was systematically studied, with estimates provided for the critical exponents z and nu.
Article
Materials Science, Multidisciplinary
Surajit Dutta, John Jesudasan, Pratap Raychaudhuri
Summary: In this study, transport and spectroscopic signatures consistent with a magnetic field induced transition from a vortex liquid to a Bose metal were found in a two-dimensional amorphous superconductor, a-MoGe, using magnetotransport and scanning tunneling spectroscopy (STS) techniques. The results provide insights into the transport and spectrum characteristics during the transition process.
Article
Materials Science, Multidisciplinary
Je Huan Koo
Summary: This study investigates a state called diaelectric, which is derived from a direct-current type negative dielectric susceptibility. Permanent magnets are proposed as potential strong diaelectric materials, and the concept of an image charge is introduced to explain the origin of this diaelectric phenomenon.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Computer Science, Information Systems
Mikhail Tarasov, Aleksandra Gunbina, Mikhail Fominsky, Artem Chekushkin, Vyacheslav Vdovin, Valery Koshelets, Elizaveta Sohina, Alexei Kalaboukhov, Valerian Edelman
Summary: Samples of SIS and NIS junctions with superconducting aluminum of different thickness were fabricated and compared using different fabrication methods. The best-quality NIS junctions showed excellent performance at low temperatures, with resistance determined by Andreev current and single-electron current.
Article
Chemistry, Multidisciplinary
Somesh Chandra Ganguli, Viliam Vano, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth
Summary: Transition metal dichalcogenides (TMDC) are a family of two-dimensional materials with diverse quantum states. NbSe2, a d(3) TMDC, is a superconducting material with strong electronic repulsions indicating the presence of competing interactions and correlated insulating states.
Article
Materials Science, Multidisciplinary
Sankar Das Sarma, Haining Pan
Summary: This paper discusses the general issue of confirmation bias in experiments verifying various theoretical topological quantization predictions, using the recently retracted work by Zhang et al. and the related data from the Delft experiment as examples. It also analyzes a more recent nanowire experiment, showing that disorder may lead to misinterpretation of trivial zero-bias peaks as topological Majorana modes.
Article
Physics, Multidisciplinary
Zhilong Yang, Haijun Zhangl
Summary: The interplay between magnetism and topologically non-trivial electronic states is an important subject in condensed matter physics. In this study, an effective method based on first-principles calculations is developed to investigate the effects of different surface magnetizations on the topological surface states of MnBi2Te4. The results show that surface magnetization has significant effects on the surface states, and the symmetry breaking of Fermi surfaces and quasiparticle interferences may be a useful way to determine the possible surface magnetization of MnBi2Te4.
NEW JOURNAL OF PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Matus Molcan, Andrzej Skumiel, Milan Timko, Ivo Safarik, Kristina Zolochevska, Peter Kopcansky
Summary: Various materials, including iron oxide particle nanosystems, are studied in the field of magnetic hyperthermia, with promising results shown in clinical trials. The type of material can affect hyperthermia indicators, and studies have analyzed magnetite nanoparticles in different forms, revealing that a rotating magnetic field is more efficient in generating heat than an alternating magnetic field. Efficiency varies based on the arrangement of magnetite nanoparticles.
Article
Chemistry, Multidisciplinary
Mao-Hua Du, Jiaqiang Yan, Valentino R. Cooper, Markus Eisenbach
Summary: This study investigates the defect formation and dopant incorporation in MnBi(2)Te(4) and MnBi(4)Te(7) through systematic density functional theory calculations, revealing that internal heterostructure induces large-size-mismatched antisite defects and substitutional dopants. Te-rich growth conditions can reduce bulk free electron density, while Na doping is proposed as an effective way to pin the Fermi level for observing surface quantum transport. The findings suggest strategies for defect engineering and doping in MnBi(2)Te(4), MnBi(4)Te(7), and related magnetic topological insulators.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jiarong Cai, Jing Zhao, Xiaoqing Gao, Wei Ma, Dan Meng, Hongyu Zhang, Changlong Hao, Maozhong Sun, Hua Kuang, Chuanlai Xu, Liguang Xu
Summary: By modulating the magnetic and electrical transition dipoles and confined ion transport, chiromagnetic Fe3O4 nanofilms were prepared and enabled the discrimination and detection of chiral drug enantiomers, showcasing the potential of chiral magnetic effects in practical applications.
Article
Nuclear Science & Technology
C. Bachmann, M. Siccinio, M. Albino, A. Chiappa, G. Falcitelli, G. Federici, L. Giannini, C. Luongo
Summary: This article evaluates the limitation considered in the definition of DEMO in 2016, which was not to exceed the magnetic field strength anticipated in the ITER machine. Previously, a maximum magnetic field of 13 T was considered achievable using Nb3Sn superconductor. However, with recent advancements using REBCO superconductor operating at >20 T, this limitation is no longer seen as a boundary. The study also reveals that the magnetic field strength is linearly dependent on the plasma aspect ratio (A) when targeting a minimum machine size. Higher magnetic fields at high A pose challenges in engineering the magnets and associated structures, as well as increasing heat loads on the divertor. Therefore, this assessment suggests investigating DEMO design points with lower magnetic field strength and aspect ratio.
FUSION ENGINEERING AND DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Jingyao Meng, Lufeng Zhang, Tianxing Ma, Hai-Qing Lin
Summary: Using the determinant quantum Monte Carlo method, the researchers studied the antiferromagnetic phase transition induced by the Zeeman field in a disordered two-dimensional Dirac fermion system. They found that the antiferromagnetic correlation is enhanced as the magnetic field increases, but is then suppressed when the magnetic field exceeds a certain critical value. The effect of the Zeeman field, Coulomb repulsion, and disorder on the antiferromagnetic correlation is not independent. The impact of the magnetic field on the antiferromagnetic correlation is strongly suppressed by disorder, and is promoted by weak interaction, but suppressed by strong interaction.
Article
Multidisciplinary Sciences
Xinyang Zhang, Alexander Palevski, Aharon Kapitulnik
Summary: Resistivity saturation is observed in the superconducting-insulating transition of a two-dimensional In/InOx composite. The material's granular morphology suggests the presence of a Josephson junction system with varying coupling and energy distribution. The study explains the temperature-independent resistance using self-duality.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Multidisciplinary
Chi Xuan Trang, Qile Li, Yuefeng Yin, Jinwoong Hwang, Golrokh Akhgar, Iolanda Di Bernardo, Antonija Grubisic-Cabo, Anton Tadich, Michael S. Fuhrer, Sung-Kwan Mo, Nikhil Medhekar, Mark T. Edmonds
Summary: This study used temperature-dependent angle-resolved photoemission spectroscopy to investigate ultrathin MnBi2Te4, revealing a temperature-dependent magnetic topological phase transition that can be achieved at higher temperatures.
Article
Chemistry, Multidisciplinary
Hong Liu, Chao Xu, Qundong Xia, Yunbin Ying, Qiang Li, Xiaoyu Zhao, Yongjun Zhang, Shikuan Yang
Summary: In this study, a new type of structural color material is reported, which is achieved by filling polystyrene nanospheres into silver brochosomes. The color is originated from the enhanced electromagnetic resonances of the polystyrene nanospheres by the surrounding metallic nanobowls. The color can be modified by tuning the diameter of the polystyrene nanospheres through plasma etching treatment. This material exhibits promising applications in the field of structural colors due to its simple fabrication process and easy processability.
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Joseph P. Kozak, Qihao Song, Ruizhe Zhang, Yunwei Ma, Jingcun Liu, Qiang Li, Wataru Saito, Yuhao Zhang
Summary: This article presents a comparative study of the parametric shift and recovery of three mainstream GaN HEMTs in repetitive overvoltage switching. The study shows that the devices exhibit shifts in threshold voltage and saturation current during the switching process, and these shifts saturate in a short period of time. The recovery process is dominated by hole detrapping and through-gate removal, with the gate stack playing a significant role. The article also suggests effective methods for poststress recovery.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Yuanyuan Ma, Jingfang Mao, Xinguo Liu, Zhongying Dai, Hui Zhang, Xinyang Zhang, Qiang Li
Summary: This study explored a deep learning-based framework to segment iGTV rapidly and accurately in 4D CT images for lung cancers. The results showed that the proposed networks with multi-channel multi-path and convolutional GRU improved the segmentation accuracy but reduced the segmentation efficiency. Different fusion strategies also had different effects on similarity and distance metrics.
Article
Physics, Multidisciplinary
D. Nevola, N. Zaki, J. M. Tranquada, W. -G. Yin, G. D. Gu, Q. Li, P. D. Johnson
Summary: An intense debate has arisen recently regarding the changes induced by light in iron-chalcogenide superconductors, specifically the enhancement of superconductivity and the emergence of a metastable state. Through high-energy resolution techniques, we directly observe the melting of superconductivity on ultrafast timescales. Our results demonstrate a non-equilibrium response on short timescales, with the gap filling in before the destruction of the superconducting peak, followed by a metastable response. We propose that pair phase decoherence and an increase in double-stripe correlations competing with superconductivity could explain these observations. These findings contribute to the exciting advancements in iron-based superconductors and suggest that the photoinduced metastable state may compete with superconductivity.
Article
Multidisciplinary Sciences
Zhendong Jin, Yangmu Li, Zhigang Hu, Biaoyan Hu, Yiran Liu, Kazuki Iida, Kazuya Kamazawa, Matthew B. Stone, Alexander I. Kolesnikov, Douglas L. Abernathy, Xiangyu Zhang, Haiyang Chen, Yandong Wang, Chen Fang, Biao Wu, Igor A. Zaliznyak, John M. Tranquada, Yuan Li
Summary: A large body of knowledge about magnetism is obtained from models of interacting spins on magnetic ions. However, proposals beyond the ionic picture are rare and rarely verified. In this study, using inelastic neutron scattering, it is found that the fundamental magnetic units in the near-ferromagnet MnSi are extended molecular orbitals consisting of three Mn atoms, contrasting the ionic picture. This discovery provides important insights into both MnSi and a broad range of magnetic quantum materials.
Article
Optics
Jianghui Liu, Qiang Li, Junbo Liu, Song Hu, Chunchao Qi
Summary: In this work, a structure-illumination based wafer focus measuring system (SI-WFMS) was proposed, which can measure the vertical defocus distance of the exposure area with less than 0.06 μm error in a single-step sampling process. The SI-WFMS can also rapidly measure the surface profile and tilt angle of the wafer, saving measuring time and improving manufacturing efficiency.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Wei Wang, Jun Li, Zhixiu Liang, Lijun Wu, Pedro M. Lozano, Alexander C. Komarek, Xiaozhe Shen, Alex H. Reid, Xijie Wang, Qiang Li, Weiguo Yin, Kai Sun, Ian K. Robinson, Yimei Zhu, Mark P. M. Dean, Jing Tao
Summary: Understanding the driving mechanisms behind metal-insulator transitions (MITs) is crucial for controlling material properties. The nature of charge order and its role in the MIT of magnetite Fe3O4 have remained unclear. Recent research has found a nematic charge order in the high-temperature structure of Fe3O4, which competes with the lattice order and triggers the Verwey transition. This discovery uncovers an unconventional type of electronic nematicity and provides insights into the mechanism of transition in Fe3O4 via electron-phonon coupling.
Article
Materials Science, Multidisciplinary
Machteld E. Kamminga, Kristine M. L. Krighaar, Astrid T. Romer, Lise O. Sandberg, Pascale P. Deen, Martin Boehm, Genda D. Gu, John M. Tranquada, Kim Lefmann
Summary: We investigated the effect of uniaxial stress on magnetic stripes in the cuprate system La2-xBaxCuO4. The superconducting transition temperature was found to be enhanced under stress. Neutron scattering confirmed that stress suppresses static stripes, suggesting a trade-off between superconductivity and static magnetism. Our results also revealed a displacement of weight from the elastic channel to the inelastic channel and a shift in the momentum of fluctuations towards the typical 1/8 value of commensurability.
Article
Materials Science, Multidisciplinary
Tianchen Hu, Hanqi Pi, Shuxiang Xu, Li Yue, Qiong Wu, Qiaomei Liu, Sijie Zhang, Rongsheng Li, Xinyu Zhou, Jiayu Yuan, Dong Wu, Tao Dong, Hongming Weng, Nanlin Wang
Summary: We have discovered that ScV6Sn6, a new intermetallic material with kagome lattice, undergoes a first-order structural phase transition at around 92K, forming a 3 x 3 x 3 charge density wave. Optical spectroscopy and band structure calculations revealed abrupt changes in optical reflectivity/conductivity spectra and band structure after the transition. This provides important insights into the origin of the structural phase transition in this unique kagome lattice intermetallic material.
Article
Materials Science, Multidisciplinary
J. Sears, Y. Shen, M. J. Krogstad, H. Miao, E. S. Bozin, I. K. Robinson, G. D. Gu, R. Osborn, S. Rosenkranz, J. M. Tranquada, M. P. M. Dean
Summary: The interaction between charge density wave (CDW) and lattice plays a crucial role in La1.875Ba0.125CuO4, inducing periodic modulation of Cu-Cu spacing within the CuO2 planes and out-of-plane breathing modulation of lanthanum layers. The CDW-related structural distortions propagate through the crystal, leading to overlapping structural modulations in adjacent layers and within the same layer. This effect could facilitate the coupling of CDWs between adjacent planes.
Article
Materials Science, Multidisciplinary
Tianhao Ren, Pedro M. Lozano, Qiang Li, Genda Gu, Alexei M. Tsvelik
Summary: Recent measurements of angle-resolved c-axis resistivity in stripe-ordered La2-xBaxCuO4 (LBCO) with x = 1/8 have shown an unexpected dependence on the direction of the in-plane magnetic field. These findings suggest the existence of two different types of superconducting pairs in x = 1/8 LBCO: one type confined to the Cu-O planes with finite momentum, and the other type, probably the conventional d wave with zero momentum, propagating along narrow conducting channels in the c-axis direction. The observed exponential temperature dependence of c-axis resistivity rho c(T) is attributed to thermally excited slips of the superconducting phase and flux flows. A simple theory is presented to explain the observed z/2-periodic dependence of rho c on the direction of the in-plane magnetic field and other data.
Article
Materials Science, Multidisciplinary
I. Mohelsky, J. Wyzula, B. A. Piot, G. D. Gu, Q. Li, A. Akrap, M. Orlita
Summary: Using Landau-level spectroscopy, the temperature dependence of the energy band gap in zirconium pentatelluride (ZrTe5) is determined. It is found that the band gap reaches E-g = (5 & PLUSMN; 1) meV at low temperatures and increases monotonically with the temperature. This implies that ZrTe5 is a weak topological insulator with noninverted ordering of electronic bands in the center of the Brillouin zone. Magnetotransport experiments show that the resistivity anomaly in ZrTe5 is not connected with the temperature dependence of the band gap.
Article
Materials Science, Multidisciplinary
A. M. Tsvelik
Summary: This Letter presents a simple mechanism for superconducting pairing with finite wave vector, known as pair density wave, based on weak coupling. The mechanism is demonstrated using a quasi-one-dimensional model that is relevant to a specific class of quasi-one-dimensional materials. In this model, pair and charge density wave order parameters are intertwined and can be understood through particle-hole symmetry.
