Article
Multidisciplinary Sciences
Thuc T. Mai, Kevin F. Garrity, Amber McCreary, Joshua Argo, Jeffrey R. Simpson, Vicky Doan-Nguyen, Rolando Valdes Aguilar, Angela R. Hight Walker
Summary: Magnetic excitations in van der Waals materials, particularly in the 2D limit, have been studied using temperature-dependent magnetoRaman spectroscopy. The researchers identified hybridization of two-magnon excitations with two phonons in manganese phosphorus triselenide, and constructed a model to explain the observations. This work demonstrates the strong hybridization between phonons and a two-magnon continuum, providing insight into interactions in 2D magnetic materials.
Article
Chemistry, Multidisciplinary
Amit Pawbake, Thomas Pelini, Alex Delhomme, Davide Romanin, Diana Vaclavkova, Gerard Martinez, Matteo Calandra, Marie-Aude Measson, Martin Veis, Marek Potemski, Milan Orlita, Clement Faugeras
Summary: Magnetic layered materials have shown potential in introducing magnetism in two-dimensional structures. This study successfully manipulated the magnon-phonon resonance by applying high hydrostatic pressures and high magnetic fields, leading to the formation of magnon-polarons.
Article
Chemistry, Multidisciplinary
Shiyi Han, Nguyen Tuan Hung, Ying Xie, Riichiro Saito, Jin Zhang, Lianming Tong
Summary: The helicity-dependent Raman spectra of an isolated, chiral, single-wall carbon nanotube were studied using circularly polarized light. It was found that the polarized Raman intensity for the radial breathing mode exhibited an asymmetric angle dependence, reflecting the axial chirality of the nanotube. The complex phase of each component of the Raman tensor reached a maximum at a chiral angle of 15 degrees, which was between two non-chiral nanotubes.
Article
Chemistry, Multidisciplinary
Lawson T. Lloyd, Ryan E. Wood, Fauzia Mujid, Siddhartha Sohoni, Karen L. Ji, Po-Chieh Ting, Jacob S. Higgins, Jiwoong Park, Gregory S. Engel
Summary: Observation of ultrafast intervalley coupling between all A and B valley exciton states in large-area monolayer MoS2 films leads to a complete breakdown of the valley index, posing a fundamental challenge for exciton-based valleytronics in monolayer TMDs.
Review
Chemistry, Multidisciplinary
Preethu P. Satheesh, Hyeon-Sik Jang, Bhishma Pandit, S. Chandramohan, Keun Heo
Summary: Van der Waals (vdW) materials of transition metal dichalcogenides (TMD) family with semiconducting properties are currently a hot research topic in the field of optoelectronics. The ability to couple them with one another at atomic interface precision in a synergistic way opens up unprecedented opportunities to design photodetectors with excellent performance. This review provides a comprehensive understanding of the fundamental properties, optical identification, band gap nature, interlayer coupling, and recent advances in photodetectors based on ReS2, ReSe2, and their vdW heterostructures. Various conceptual device designs and potential applications are critically reviewed, and future prospects are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tingting Yin, Kanchan Ajit Ulman, Sheng Liu, Andres Granados del Aguila, Yuqing Huang, Lifa Zhang, Marco Serra, David Sedmidubsky, Zdenek Sofer, Su Ying Quek, Qihua Xiong
Summary: This study reveals the existence of chiral phonons in 2D magnetic CrBr3, which can completely switch the polarization of incident light, and non-chiral A(g) phonons exhibit significant magneto-optical effects under an external magnetic field. These results lay a foundation for further studies on phonon chirality and magneto-optical phenomena in 2D magnetic materials.
ADVANCED MATERIALS
(2021)
Article
Plant Sciences
Jose Alvarez, Sagrario Martinez-Ramirez, Elvira Martinez
Summary: The combination of Micro-Raman spectroscopy with magneto-priming is an effective method for studying the chemical composition of Triticale seeds, revealing more compounds with a particularly noticeable impact on the endosperm.
Article
Physics, Multidisciplinary
Doried Ghader
Summary: This study comprehensively investigates magnon topology and magnon valley-polarization in layered 2D magnets, exploring the effects of magnetic spin-orbit couplings, magnetic ground states, stacking order, and inversion symmetry breaking on topological phases, magnon valley transport, and Hall and Nernst effects. It provides insights into the nature of spin-orbit couplings and predicts unconventional conductivities in topologically trivial phases, while also reporting on novel bandgap closures in layered antiferromagnets with detailed topological implications.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Applied
Isamu Yasuda, Takuya Kawada, Hiroki Matsumoto, Masashi Kawaguchi, Masamitsu Hayashi
Summary: We investigated helicity-resolved Raman scattering in PtSe2 flakes of varying thicknesses. The peak amplitude of helicity-switched Raman scattering is significantly larger than that of helicity-conserved scattering for the in-plane E (g) mode, in agreement with Raman tensor analyses and the conservation law of angular momentum. The peak amplitude of the helicity-switched E (g) mode is greater for thinner flakes. Additionally, we observed Raman peaks near the energy levels of IR-active E (u) and A (2u) modes, but only in monolayer and a few-layers-thick flakes. Interestingly, these peaks are only present in helicity-switched Raman scattering and are nearly absent in helicity-conserved scattering.
APPLIED PHYSICS EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Irina V. Antonova, Konstantin A. Kokh, Nadezhda A. Nebogatikova, Evgenii A. Suprun, Vladimir A. Golyashov, Oleg E. Tereshchenko
Summary: This study investigates the growth of Bi2Se3 films on printed graphene using vapor deposition. By using 2D-printed graphene and the capillary effect conditions, it is possible to form continuous films with a thickness of 8 nm or more and larger crystallites. The properties of the films grown on printed graphene are similar to those grown on CVD graphene. Additionally, heterostructures with high carrier mobility and transparent electrodes can be formed if the printed graphene contains residual organic additives.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Mateusz Dyksik, Dorian Beret, Michal Baranowski, Herman Duim, Sebastien Moyano, Katarzyna Posmyk, Adnen Mlayah, Sampson Adjokatse, Duncan K. Maude, Maria Antonietta Loi, Pascal Puech, Paulina Plochocka
Summary: The authors investigate the optical response of 2D layered perovskites and observe the presence of phonon replicas. They also observe a high-frequency signal with spectral fingerprints of polarons and characterize the polaron vibronic progression. The understanding of polaronic effects in perovskites is important for future opto-electronic applications.
Article
Chemistry, Analytical
Guohua Qi, Xingkang Diao, Shuping Hou, Jiao Kong, Yongdong Jin
Summary: Proteins as the main undertakers of life activities were sensitively detected in the nucleus and mitochondria of cells under electrical stimulation using label-free surface-enhanced Raman spectroscopy. The developed plasmonic SERS sensing platform shows superior sensitivity and repeatability in analyzing protein conformation and expression levels during the stimulation process, providing potential for bioassay and cell studies.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Hongyu An, Longfei Wu, Laurens D. B. Mandemaker, Shuang Yang, Jim de Ruiter, Jochem H. J. Wijten, Joris C. L. Janssens, Thomas Hartman, Ward van der Stam, Bert M. Weckhuysen
Summary: The study successfully monitored the process of carbon dioxide reduction to hydrocarbons using time-resolved Raman spectroscopy, and found that anodic treatment and surface oxide reduction of the copper electrode can improve CO2RR efficiency and time resolution.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Thomas P. Gray, Jun Nishida, Samuel C. Johnson, Markus B. Raschke
Summary: This study demonstrates vibrational excitons as a molecular ruler for measuring the delocalization of intermolecular wave functions and nano-domain size in SAMs. By combining experimental measurements and modeling, the domain sizes and distribution of 4-NTP SAM on gold surface were revealed.
Article
Chemistry, Multidisciplinary
Xin Chen, Malte Kohring, M'hamed Assebban, Bartlomiej Tywoniuk, Cian Bartlam, Narine Moses Badlyan, Janina Maultzsch, Georg S. Duesberg, Heiko B. Weber, Kathrin C. Knirsch, Andreas Hirsch
Summary: The study presents an efficient method to pattern 2D MoS2 into delicate ribbon patterns with a minimum feature size of 2 micrometers, combining electron beam lithography with surface covalent functionalization. The patterned monolayer MoS2 domain consists of a well-defined heterophase homojunction and alternately distributed surface characteristics, showing great potential for further exploration in MoS2 based devices.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Yin-Ti Ren, Yuan-Tao Chen, Liang Hu, Jiang-Long Wang, Peng-Lai Gong, Hu Zhang, Li Huang, Xing-Qiang Shi
Summary: By using density functional theory calculations, it has been shown that both n-type and p-type ohmic contacts to MoS2 can be achieved using different surfaces of the same material, CuS. The p-type ohmic contact can be obtained by utilizing the higher work function F(Cu-S) surface which reduces the p-type Schottky barrier height. The tunable barrier heights and contact types of the CuS/MoS2 junctions make them promising for high-efficiency electronic and optoelectronic devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Jing Wan, Haiyan Zhu, Peiyuan Ji, Xiangyu Han, Li Huang, Chenguo Hu
Summary: The use of graphene-wrapped Na0.67MnO2 (GO/Na0.67MnO2) results in improved electric conductivity and ion diffusion capability. This enhancement is attributed to the transfer of a large amount of electrons from graphene to Na0.67MnO2, increasing the Fermi level and ion diffusion capability of Na0.67MnO2. This study provides a comprehensive understanding of the electron-transfer mechanism of GO/Na0.67MnO2 and offers a feasible approach to study the electrochemical properties of Na0.67MnO2 composites.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Physics, Multidisciplinary
Chengcheng Zhang, Yuan Wang, Fayuan Zhang, Hongtao Rong, Yongqing Cai, Le Wang, Xiao-Ming Ma, Shu Guo, Zhongjia Chen, Yanan Wang, Zhicheng Jiang, Yichen Yang, Zhengtai Liu, Mao Ye, Junhao Lin, Jiawei Mei, Zhanyang Hao, Zijuan Xie, Chaoyu Chen
Summary: Rare earth antiferromagnet GdAuAl4Ge2 is a candidate material for magnetic topological metal, with nontrivial Z (2) topology and strong termination dependence of surface bands. Further study is needed to investigate its magnetic structure, magnetic topology state, transport behavior, and microscopic properties.
Article
Physics, Multidisciplinary
Yu Zhang, Jiawei Mei, Weiqiang Chen
Summary: The one-band t-J model captures strong correlations in cuprate high-temperature superconductors, including the intertwined spin and charge orders as well as superconductivity. By simulating the t-J model on a six-leg lattice with a small J case (t/J = 10), we find the absence of superconductivity and enhanced intertwined spin and charge orders. In addition to the stripe phases, a new SDW + CDW phase with a (pi, pi) antiferromagnetism spin modulation and shorter wavelength of charge modulation is observed.
CHINESE PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Yuan Wang, Yixuan Liu, Zhanyang Hao, Wenjing Cheng, Junze Deng, Yuxin Wang, Yuhao Gu, Xiao-Ming Ma, Hongtao Rong, Fayuan Zhang, Shu Guo, Chengcheng Zhang, Zhicheng Jiang, Yichen Yang, Wanling Liu, Qi Jiang, Zhengtai Liu, Mao Ye, Dawei Shen, Yi Liu, Shengtao Cui, Le Wang, Cai Liu, Junhao Lin, Ying Liu, Yongqing Cai, Jinlong Zhu, Chaoyu Chen, Jia-Wei Mei
Summary: We report a titanium-based kagome metal CsTi3Bi5, where titanium atoms form a kagome network as in its isostructural compound CsV3Sb5. The thermodynamic properties reveal the conventional Fermi liquid behavior and no signature of superconducting or charge density wave (CDW) transition anomaly down to 85 mK. The angle-resolved photoemission spectroscopy measurements show multiple bands crossing the Fermi level, with a direct observation of the flat band formed by the destructive interference of hopping in the kagome lattice. The absence of CDW is consistent with the van Hove singularities pushed far away above the Fermi level in CsTi3Bi5, and the first-principles calculations confirm the nontrivial DOUBLE-STRUCK CAPITAL Z(2) topological properties for the bands crossing the Fermi level.
CHINESE PHYSICS LETTERS
(2023)
Correction
Physics, Multidisciplinary
Yuan Wang, Yixuan Liu, Zhanyang Hao, Wenjing Cheng, Junze Deng, Yuxin Wang, Yuhao Gu, Xiao-Ming Ma, Hongtao Rong, Fayuan Zhang, Shu Guo, Chengcheng Zhang, Zhicheng Jiang, Yichen Yang, Wanling Liu, Qi Jiang, Zhengtai Liu, Mao Ye, Dawei Shen, Yi Liu, Shengtao Cui, Le Wang, Cai Liu, Junhao Lin, Ying Liu, Yongqing Cai, Jinlong Zhu, Chaoyu Chen, Jia-Wei Mei
CHINESE PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yongqing Cai, Jianfeng Wang, Yuan Wang, Zhanyang Hao, Yixuan Liu, Liang Zhou, Xuelei Sui, Zhicheng Jiang, Shengjie Xu, Han Ge, Xiao-Ming Ma, Chengcheng Zhang, Zecheng Shen, Yichen Yang, Qi Jiang, Zhengtai Liu, Mao Ye, Dawei Shen, Yi Liu, Shengtao Cui, Le Wang, Cai Liu, Junhao Lin, Bing Huang, Liusuo Wu, Jincheng Zhuang, Hongtao He, Wenqing Zhang, Jia-Wei Mei, Chaoyu Chen
Summary: This study identifies a rare two-dimensional neutral line semimetal material protected by mirror symmetry and observes multiple type-II Dirac nodal lines close to the Fermi level through angle-resolved photoemission spectroscopy (ARPES), providing an electronic explanation for the nonsaturating magnetoresistance effect. These findings suggest CsV8Sb12 as an ideal platform for exploring novel transport properties.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xuefeng Zhou, Wenwen Xu, Zhigang Gui, Chao Gu, Jian Chen, Jianyu Xie, Xiaodong Yao, Junfeng Dai, Jinlong Zhu, Liusuo Wu, Er-jia Guo, Xiaohui Yu, Leiming Fang, Yusheng Zhao, Li Huang, Shanmin Wang
Summary: Based on high-quality samples synthesized by a high-pressure method, the crystal structure and properties of LaWN3 have been studied comprehensively. It is found that LaWN3 adopts an orthorhombic Pna2(1) structure with a polar symmetry along the c-axis. The atomic polar distortions in LaWN3 are driven by covalent hybridization of W: 5d and N: 2p orbitals, which leads to its semiconducting behaviors. This study provides important insights into the structures and properties of nitride perovskites.
Article
Materials Science, Multidisciplinary
Yixuan Liu, Yuan Wang, Yongqing Cai, Zhanyang Hao, Xiao-Ming Ma, Le Wang, Cai Liu, Jian Chen, Liang Zhou, Jinhua Wang, Shanmin Wang, Hongtao He, Yi Liu, Shengtao Cui, Bing Huang, Jianfeng Wang, Chaoyu Chen, Jia-Wei Mei
Summary: The newly discovered kagome superconductors AV(3)Sb(5) (A = K, Rb, Cs) exhibit superconductivity, charge order, and band topology simultaneously. In this study, we investigate the doping evolution of underlying electronic structures in doped topological kagome superconductors Cs(V1-xTix)(3)Sb-5 and observe that the superconductivity survives in all doped samples despite the absence of the charge-density-wave (CDW) phase transition. The high-resolution angle-resolved photoemission spectroscopy (ARPES) measurements and first-principles simulations reveal the influence of Ti dopant on the band structure and explain the absence of the CDW ordering.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mengru Cong, Han Ge, Lei Zhang, Weijun Ren, Nan Zhao, Tiantian Li, Shanmin Wang, Jinlong Zhu, Jiawei Mei, Qiang Zhang, Jieming Sheng, Fei Gao, Bing Li, Zhidong Zhang, Liusuo Wu
Summary: Geometrical frustration and strong quantum fluctuations in a two-dimensional triangular antiferromagnet, NdAuAl4Ge2, were studied. Thermodynamic and transport measurements were performed, revealing multiple phase transitions and anisotropy under magnetic field. The resistivity measurements indicated that NdAuAl4Ge2 is a good metal.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
M. Umar Farooq, Zhigang Gui, Li Huang
Summary: The discovery of new nontrivial degrees of freedom of Bloch electrons is a significant subject in condensed matter physics. Current research focuses on the interaction between the spin-orbit coupling-induced pseudospin valley state and time inversion asymmetry. In this study, a distinct magnetic order-protected, momentum-dependent spin-splitting valley state (SSV) is proposed in polar bulk BiFeO3. The octahedral distortion-induced spatial asymmetry breaks spin degeneracy and time-reversal symmetry, giving rise to SSV polarization and resulting in nonzero anomalous Hall conductivity and magneto-optical effects. The ferroelectric nature of BiFeO3 allows for straightforward tunability of these unconventional magneto-optical effects and anomalous Hall conductivity under an electric field.
Article
Materials Science, Multidisciplinary
Zhe Wang, Zhigang Gui, Li Huang
Summary: The sliding ferroelectricity in artificially stacked nonpolar two-dimensional (2D) materials greatly expands the range of 2D ferroelectrics. However, the electric polarizations are generally small due to weak van der Waals interlayer interaction. Discovering 2D sliding ferroelectrics with large polarization remains a challenge.
Article
Chemistry, Multidisciplinary
Abid Ahmad, Bin Zhu, Zhongbin Wang, Zhigang Gui, Wu Wang, Tiancheng Wang, Yong Yu, Li Huang, Jiaqing He
Summary: Significant advancements have been made in thermoelectric technology, with the development of a new thermoelectric material containing silver doping. It exhibits high thermoelectric performance and significantly reduces thermal conductivity through entropy optimization and atomic doping, thereby improving the conversion efficiency and output power of the thermoelectric module.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Minghui Wu, Hongping Yang, Fengyan Xie, Li Huang
Summary: This study investigates the lattice dynamics of the binary compound Mg3Sb2 and its ternary analog CaMg2Sb2 using first-principles calculations. The results show that the moderate anharmonicity in CaMg2Sb2 leads to a T-1 temperature dependence of kappa(L), while the strong quartic anharmonicity in MgMg2Sb2 results in an ultralow kappa(L) with weak temperature dependence.
Article
Materials Science, Multidisciplinary
Haiyan Zhu, Yifan Gao, Yusheng Hou, Zhigang Gui, Li Huang
Summary: In this study, the magnetic diagram of monolayer 1T-CrTe2 under in-plane biaxial strain and on-site Coulomb repulsion is obtained using first-principles calculations. It is found that the magnetic order of monolayer 1T-CrTe2 can change from ferromagnetic to antiferromagnetic with strain and electronic correlation. Furthermore, the large exchange anisotropy and higher-order biquadratic interactions are crucial for accurately describing the spin energies in monolayer 1T-CrTe2, while the dependence of magnetocrystalline anisotropy on strain and Coulomb repulsion is explained.
