Article
Physics, Applied
Xuening Wang, Ju Chen, Hongli Chen, Yipeng An, Shi-Jing Gong
Summary: In this work, the band structures of 2H-VX2 (X = S, Se, and Te) were investigated through first-principles calculations. The results showed that 2H-VS2 and 2H-VSe2 are bipolar magnetic semiconductors, while 2H-VTe2 is a unipolar magnetic semiconductor. Interestingly, the electronic orbitals near the Fermi level of 2H-VX2 can be effectively modulated by biaxial strain, making them potential candidates for spintronics applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Rovi Angelo B. Villaos, Harvey N. Cruzado, John Symon C. Dizon, Aniceto B. Maghirang, Zhi-Quan Huang, Chia-Hsiu Hsu, Shin-Ming Huang, Hsin Lin, Feng-Chuan Chuang
Summary: This study investigates the effects of thin-film thickness on transition metal dichalcogenides, revealing the tunability of electronic properties of ZrX2 thin films due to thickness dependence and strain. The research demonstrates that ZrX2 adopts the 1T phase as the most stable structure, with varying band gaps and the potential for superconductivity in certain thin films.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Weibiao Wang, Zhexue Chen, Xinyu Sui, Yueqi Li, Xinfeng Liu, Yong Zhang
Summary: This paper reports a purely physical top-down method for producing controllable indium chalcogenide nanosheets using silica-assisted ball-milling and sonication-assisted solvent exfoliation. The method enables the production of multiscale nanosheets with varying distributions, which are then separated by cascade centrifugation. The as-produced nanosheets exhibit size-dependent photoluminescence and nonlinear saturation absorption in PMMA hybrid films.
Article
Chemistry, Multidisciplinary
Jinjun Ding, Chuanpu Liu, Yuejie Zhang, Vijaysankar Kalappattil, Rui Yu, Uppalaiah Erugu, Jinke Tang, Haifeng Ding, Hua Chen, Mingzhong Wu
Summary: The study found that an Ag spacer between the alpha-Sn film and NiFe film can enhance the damping of the NiFe film, potentially related to the topologically nontrivial surface states of the alpha-Sn film. These results suggest that the topological Dirac semimetal alpha-Sn may have promising applications in spintronics.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhongyuan Guan, Haihang Ye, Peiwen Lv, Lijin Wang, Jing Zhang, Bin Zou, Aiwei Tang
Summary: The growth of multinary Cu-based chalcogenide nanocrystals involves the presence of copper vacancies affecting exciton recombination, the high reaction activity of selenium leading to red-shift in photoluminescence maximum, and the competitive relationship between growth and diffusion of zinc resulting in red- or blue-shift in photoluminescence maximum.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Xin Tan, Yuting Tang, Yurong Ren, Xiaofang Lai, Minhao Guo, Mingling Xiao, Ruiwen Wu, Zhicong Shi, Jun Liu, Jikang Jian
Summary: Two new layered chalcogenides with spin-glass and semiconducting properties have been successfully synthesized and show potential applications in lithium-ion batteries.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Crystallography
Christopher Sims
Summary: Black holes are massive objects that distort space time, characterized by an event horizon and singularity. Recently, there has been a concept of analogous black holes in condensed matter physics. This study discusses the possibility of realizing analogous black holes in topological materials, using Ni3In2X2 (X = S, Se) as an example. It shows that the type-III Dirac cones in the material can lead to the emergence of an event horizon and the formation of a black hole-like region near the Dirac point. Additionally, the potential experimental signatures and implications for studying black hole physics in condensed matter systems are discussed.
Article
Chemistry, Physical
Ashakiran Maibam, Ravichandar Babarao, Sailaj A. Krishnamurty
Summary: This study explores the electrocatalytic nitrogen fixation on vanadium dichalcogenides (VX2) with non-metal dopants under ambient conditions. The interface chemistry, electronic properties, and synergistic effects of the non-metal dopants on VX2 are investigated, with a focus on several non-metal atoms as catalytic centers. Boron and carbon doped VX2 monolayers are found to be electrocatalytically active for nitrogen reduction reaction (NRR), as evidenced by their efficacity in N2 chemisorption and N-N bond activation. The thermodynamic favourability for product formation, determined by Gibbs free energy differences, plays a pivotal role in the NRR mechanism. Charge transfer, pi-pi* orbital hybridization, and electron donor-acceptor mechanism between the non-metal and N2 are found to modulate the electrocatalytic barrier for NRR on VX2 monolayers. This study proposes boron doped VS2 as an environmentally friendly and efficient electrocatalyst for NRR, with a low overpotential of 0.06 eV.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Wangping Xu, Zijuan Xie, Jun Su, Rui Wang, Xiaozhi Wu, Hu Xu
Summary: This study systematically investigates the giant anisotropic optoelectronics in layered PbSnX2 (X = S/Se), revealing the origins and influencing factors of highly anisotropic photoelectronic properties, and showcasing the potential applications in single-layer and bilayer PbSnX2.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Jiading Bao, Jian Qiu, Xiaodong Liu
Summary: This study investigates the piezoelectric properties of Janus Bi2X2Y monolayers with polyatomic thickness, revealing their large in-plane piezoelectric coefficient d11 and potential applications in micro-nano piezoelectric devices and flexible electronic devices.
Article
Physics, Multidisciplinary
Kazuhiro Nawa, Yoshinori Imai, Youhei Yamaji, Hideyuki Fujihara, Wakana Yamada, Ryotaro Takahashi, Takumi Hiraoka, Masato Hagihala, Shuki Torii, Takuya Aoyama, Takamasa Ohashi, Yasuhiro Shimizu, Hirotada Gotou, Masayuki Itoh, Kenya Ohgushi, Taku J. Sato
Summary: A polymorph of RuI3 synthesized under high pressure has a two-layered honeycomb structure and exhibits semimetallic behavior in terms of resistivity, indicating strong electron correlations. Pauli paramagnetic behavior was observed in temperature dependence of magnetic susceptibility and nuclear spin-lattice relaxation rate 1/T1.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2021)
Review
Chemistry, Multidisciplinary
Tian-Ran Wei, Pengfei Qiu, Kunpeng Zhao, Xun Shi, Lidong Chen
Summary: Ag(2)Q-based materials, such as silver chalcogenides, have complex crystal structures, high carrier mobility, low lattice thermal conductivity, and exceptional plasticity, making them potential thermoelectric materials. This review focuses on the latest advances in this material family, including the understanding of multi-scale structures and peculiar properties, the optimization of thermoelectric performance, and the rational design of new materials. The correlation between composition-phase structure and thermoelectric/mechanical properties is emphasized. Flexible and hetero-shaped thermoelectric prototypes based on Ag(2)Q materials are also demonstrated. Several key problems and challenges for further understanding and optimization of Ag(2)Q-based thermoelectric chalcogenides are proposed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Shulin Bai, Jingyi Zhang, Mengxiu Wu, Dongming Luo, Da Wan, Xiaodong Li, Shuwei Tang
Summary: Inspired by the layered LaCuOX (X = S, Se), the TE properties of Ag-based isomorphic LaAgOX are systematically studied. LaAgOS and LaAgOSe are direct semiconductors with wide bandgaps. The p-type LaAgOX shows excellent TE performance due to large Seebeck coefficient and low thermal conductivity. The optimal ZTs are achieved for p-type LaAgOS and LaAgOSe at 700 K, providing insights for the rational design of heteroanionic materials for TE application.
Article
Nanoscience & Nanotechnology
Wang-Li Tao, Ying-Qin Zhao, Zhao-Yi Zeng, Xiang-Rong Chen, Hua-Yun Geng
Summary: A new pentagonal network structure of PtM2 (M = S, Se, Te) monolayers is reported in this study, with calculated electronic structure and thermoelectric properties. The PtTe2 material shows excellent performance in thermal conductivity and thermoelectricity, especially at 600K. The p-type PtTe2 displays potential applications in the field of thermoelectricity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Keigo Tsuruda, Kento Nakagawa, Masayuki Ochi, Kazuhiko Kuroki, Masashi Tokunaga, Hiroshi Murakawa, Noriaki Hanasaki, Hideaki Sakai
Summary: This study demonstrates the controllability of Fermi energy in layered magnet EuMnBi2 by partially substituting Eu2+ with Gd3+, leading to optimization of Dirac bands. The materials show promising thermoelectric and Nernst power factors, making them potential platforms for novel transport phenomena.
ADVANCED FUNCTIONAL MATERIALS
(2021)