Article
Chemistry, Physical
Jin-Yi Miao, Wen-Xuan Wang, Zhen-Yi Jiang, Xiao-Dong Zhang, Ji-Ming Zheng, Aijun Du
Summary: This study reveals the mechanisms behind the two phase transitions, structural phase transition and metal-insulator phase transition, in vanadium dioxide. By using density functional theory calculations, the researchers identified an intermediate phase with a zero indirect band gap semimetal. Additionally, they found that electron jumping plays a crucial role in the phase transition.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
I Castillo, T. Sohier, M. Paillet, D. Cakiroglu, C. Consejo, C. Wen, F. Wasem Klein, M-Q Zhao, A. Ouerghi, S. Contreras, A. T. Charlie Johnson, M. J. Verstraete, B. Jouault, S. Nanot
Summary: We performed transport measurements in monolayer MoS2 devices close to the bottom of the conduction band edge. The measured effective mobility is one of the highest among CVD-grown MoS2 monolayer devices. The electronic transport in the insulating regime is dominated by thermally activated transport at high temperature and Efros-Schklovkii variable range hopping at lower temperatures.
Article
Nanoscience & Nanotechnology
Xing Gao, Carlos M. M. Rosario, Hans Hilgenkamp
Summary: This study reports on the fabrication of in-plane VO2 metal-insulator-metal structures and reproducible switching measurements in these two-terminal devices. Controllable resistive switching can be achieved by applying voltage or current bias, with a pronounced intermediate state in the reset process and the ability to operate at multiple resistance levels.
Article
Chemistry, Multidisciplinary
Ahyoung Kim, Soo Yeon Lim, Jung Hyun Park, Jin-Seok Chung, Hyeonsik Cheong, Changhyun Ko, Jong-Gul Yoon, Sang Mo Yang
Summary: This study investigated the temperature-dependent nanoscale conduction in a VO2 film using C-AFM, revealing conductive regions near grain boundaries and the coexistence of different monoclinic phases. Further analysis using I-V spectroscopy and deep data analysis identified the conduction mechanism as the Poole-Frenkel mechanism. This work provides deep insight into the behavior of VO2 thin films and highlights the power of I-V spectroscopy combined with deep data analysis.
Article
Multidisciplinary Sciences
George McArdle, Igor Lerner
Summary: This study investigates the conditions for electron-phonon decoupling in suspended films and demonstrates the manifestation of a bistability in electron temperature through hysteretic jumps in nonlinear current-voltage characteristics. The findings suggest that this regime is achievable in systems with an Arrhenius form of equilibrium conductivity, but is practically unreachable in materials with Mott or Efros-Shklovskii hopping.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Long Qian, Kelly Neubauer, Joshua Miller, Yuxiang Gao, Jordan Murley, Songxue Chi, Shiming Lei, Pengcheng Dai
Summary: YbRh3Si7 is a unique heavy fermion compound with relatively high magnetic ordering temperature and large Yb-Yb distance. By doping Co into YbRh3Si7, the ferromagnetic ordering temperature can be significantly increased, and a crossover from antiferromagnetic to ferromagnetic order is observed. Specific heat and magnetotransport measurements confirm the heavy fermion behavior and persistence of Kondo latticelike behavior in the Yb(Rh1-xCox)3Si7 series.
Review
Chemistry, Inorganic & Nuclear
Mohammad Rasel Mian, Masanori Wakizaka, Takefumi Yoshida, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita
Summary: The development of new halogen-bridged Pd chain complexes with molecular precision is a promising strategy to stabilize Pd(III) ions for future advanced materials. This review focuses on the new strategies using weak ligand field and triple hydrogen bond approaches to realize Pd(III) halogen-bridged metal complexes (MX-Chains). The resulting MX-Chains exhibit the Pd(III) averaged-valence state and have potential applications in next-generation devices.
COORDINATION CHEMISTRY REVIEWS
(2023)
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
Environmental Sciences
Fei Huang, Si-Ming Zhang, Ren-Ren Wu, Lu Zhang, Peng Wang, Rong-Bo Xiao
Summary: In this study, magnetic and nonmagnetic biochars were compared for their adsorption capabilities, revealing that magnetization reduced the adsorption capacities due to decreased importance of cation-exchange and C pi-coordination in the biochars. This reduction in adsorption capacity suggests that conventional biochar may be more effective in adsorbing Cd2+ than magnetized biochar. Further research on magnetic biochars as sustainable alternatives for remediation of Cd-contaminated environments is recommended.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Electrical & Electronic
Samyuktha K. Reddy, Mandeep Singh
Summary: This study demonstrates the use of a MISIM waveguide structure for ethanol sensing, showing that in the presence of harmful ethanol, the electric field in a low refractive index slot undergoes a red-shift in wavelength. By adjusting the silicon porosity and physical dimensions, the red-shift can be controlled. The optimized sensor metrics obtained through simulations and the fabrication stages are described. The sensor is found to be feasible for ethanol detection in hazardous environments.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Khalil Zakeri, Christophe Berthod
Summary: This paper extends the theory of low-energy electron scattering by including spin-orbit coupling. The impact of this interaction on the scattering cross section is discussed, particularly for a spin-polarized electron beam scattered from nonmagnetic surfaces with strong spin-orbit coupling. An expression for the scattering cross section is derived under certain assumptions, which can be used for numerical calculations of spin-polarized spectra recorded by spin-polarized high-resolution electron energy-loss spectroscopy experiments.
Article
Materials Science, Multidisciplinary
Yulong Wang, Zhenyi Jiang, Xiaodong Zhang, Jiming Zheng, Aijun Du
Summary: High pressure technology is effective in studying the Mott or Peierls phase transition from insulator to metal phase. The existence of such transition in ambient M1/R the high-pressure X phase for bulk VO2 is still unclear. This study used first-principles calculation to investigate the PT paths of the M1 semimetallic X and metallic R semimetallic X phases.
Article
Chemistry, Inorganic & Nuclear
Dong-Sheng Shao, Wan-Wan Yao, Jin Zhang, Yin Qian, Xiao-Ming Ren
Summary: A series of isomorphic salts were prepared and characterized in this study. The thermal stabilities of the salts were found to increase with decreasing cell volume. Furthermore, the spin-Peierls transition observed in the parent salt disappeared upon doping with a nonmagnetic impurity.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Physics, Multidisciplinary
Xiaoli Ma, Yimeng Wang, Yunyu Yin, Binbin Yue, Jianhong Dai, Jinguang Cheng, Jianting Ji, Feng Jin, Fang Hong, Jian-Tao Wang, Qingming Zhang, Xiaohui Yu
Summary: Under pressure, layered magnetic NiPS3 undergoes a transition from insulator to metal state accompanied by the collapse of magnetic order. The interlayer interaction plays a crucial role in tuning the electronic and magnetic properties of the material.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Engineering, Electrical & Electronic
Yijie Qin, Jun Chen, Keyan Li, Wenting Zhang, Weilin Wang, Jun Ouyang, Xiaofei Yang
Summary: Target detection technology based on magnetic anomalies is important in various fields. This paper proposes a detection model based on a nonmagnetic metal shell target and utilizes the particle swarm optimization algorithm for target localization. The method has significant applications in medical pill tracking, trapped miner locating, etc.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Yujuan Zhang, Zhangjian Zhou, Jianhui Lan, Peihong Zhang
APPLIED SURFACE SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Peijian Wang, Shupeng Song, Arman Najafi, Chang Huai, Peihong Zhang, Yanglong Hou, Shaoming Huang, Hao Zeng
Article
Physics, Applied
Hui Xing, Peihong Zhang, Hao Zeng
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Yabei Wu, Weiyi Xia, Yubo Zhang, Wenguang Zhu, Wenqing Zhang, Peihong Zhang
PHYSICAL REVIEW APPLIED
(2020)
Article
Chemistry, Physical
Weiyi Xia, Weiwei Gao, Gabriel Lopez-Candales, Yabei Wu, Wei Ren, Wenqing Zhang, Peihong Zhang
NPJ COMPUTATIONAL MATERIALS
(2020)
Article
Physics, Applied
Zhao Tang, Greis J. Cruz, Yabei Wu, Weiyi Xia, Fanhao Jia, Wenqing Zhang, Peihong Zhang
Summary: Low-dimensional materials provide a unique platform for exploring exotic properties. C3N and C3B, two ordered alloys derived from graphene, have stable structures and moderate band gaps, and exhibit a giant narrow-band absorption peak in their optical absorption spectra. The excitonic states in these materials play a significant role and have a unique shell-like distribution.
PHYSICAL REVIEW APPLIED
(2022)
Review
Chemistry, Physical
Weiwei Gao, Weiyi Xia, Peihong Zhang, James Chelikowsky, Jijun Zhao
Summary: This review summarizes the basic concepts of the GWA and presents conventional code implementations. Due to the interest in low-dimensional materials, researchers have designed novel numerical methods for efficient and accurate prediction of quasiparticle excitations. The article focuses on recent advances in innovative GWA methods and reformulations, specifically in the context of 2D and localized systems.
ELECTRONIC STRUCTURE
(2022)
Article
Chemistry, Physical
Yabei Wu, Zhao Tang, Weiyi Xia, Weiwei Gao, Fanhao Jia, Yubo Zhang, Wenguang Zhu, Wenqing Zhang, Peihong Zhang
Summary: The synthesized MoSi2N4 is demonstrated to be an ideal 2D semiconductor with robust band edge states protected from environmental chemical coupling effects. Its quasiparticle and excitonic properties can be modulated through nonlocal dielectric screening effects.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Physics, Applied
Zhao Tang, Greis J. Cruz, Fanhao Jia, Yabei Wu, Weiyi Xia, Peihong Zhang
Summary: Using highly accurate many-body perturbation theory, we predict that a type-II heterostructure made of C3N and C3B monolayers can exhibit extraordinary optical activity in the mid-to far-infrared range. This heterostructure supports bright, low-energy interlayer excitons with large binding energies, providing an ideal material for mid-to far-infrared applications at room temperature.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Fan Zhang, Weiwei Gao, Greis J. Cruz, Yi-yang Sun, Peihong Zhang, Jijun Zhao
Summary: Using first-principles calculations, we find extremely strong exciton binding energies of about 1 eV in moderate-gap, inorganic bulk semiconductors. These binding energies exceed those of other similar semiconductors and even two-dimensional semiconductors. The lowest bright exciton energies calculated are in good agreement with optical measurements. The excitons in these materials resemble Frenkel excitons in molecular crystals and exhibit weak dielectric screening effects and nearly flat frontier electronic bands derived from weakly coupled [MX6]2- units. Spin-orbit coupling effects play a crucial role in redshifting the lowest bright exciton, while exciton-phonon coupling effects are minor.
Article
Materials Science, Multidisciplinary
Gabriel Lopez-Candales, Zhao Tang, Greis J. Cruz, Weiyi Xia, Fanhao Jia, Peihong Zhang
Summary: This study presents the quasiparticle band structures of two 4d transition metal oxides and shows that fully converged GW calculations can accurately predict their properties. The results also indicate that for 4d TMOs, DFT methods can provide good descriptions compared to 3d TMOs.
Article
Materials Science, Multidisciplinary
Gabriel Lopez-Candales, Zhao Tang, Weiyi Xia, Fanhao Jia, Peihong Zhang
Summary: The combination of G(0)W(0) and LDA + U methods can accurately predict the quasiparticle band structures of oxide perovskites SrTiO3 and BaTiO3, particularly for materials involving localized 3d states.
Article
Materials Science, Multidisciplinary
Junyu Lai, Md Nazmul Hasan, Edward Swinnich, Zhao Tang, Sang-Ho Shin, Munho Kim, Peihong Zhang, Jung-Hun Seo
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Yongcheng Liang, Azkar Saeed Ahmad, Jianzhou Zhao, Guozhu Song, Xuefeng Zhou, Jialin Ji, Wei Zhang, Zhilin Han, Jixuan Liu, Kenny Stahl, Anna Pakhomova, Konstantin Glazyrin, Guo-Jun Zhang, Wenqing Zhang, Yusheng Zhao, Rui Yu, Shanmin Wang, Peihong Zhang
Article
Chemistry, Multidisciplinary
Yujuan Zhang, Weiyi Xia, Yabei Wu, Peihong Zhang
