Article
Chemistry, Physical
Berit H. H. Goodge, Benjamin Geisler, Kyuho Lee, Motoki Osada, Bai Yang Wang, Danfeng Li, Harold Y. Y. Hwang, Rossitza Pentcheva, Lena F. F. Kourkoutis
Summary: Nickel-based superconductors provide an experimental platform for exploring cuprate-like superconductivity. However, superconductivity in nickelates has only been observed in thin films, which raises questions about the polar interface between substrate and film. In this study, the authors investigate the interface between Nd1-xSrxNiO2 and SrTiO3 using advanced characterization techniques and theoretical calculations, revealing the formation of a single intermediate Nd(Ti,Ni)O-3 layer and its role in reducing interface charge density. Understanding the complex interface structure is important for the future synthesis of nickelate films on other substrates and in vertical heterostructures.
Article
Chemistry, Multidisciplinary
Yilin Wang, Linxing Zhang, Jiaou Wang, Qiang Li, Huanhua Wang, Lin Gu, Jun Chen, Jinxia Deng, Kun Lin, Ling Huang, Xianran Xing
Summary: A promoted chemical pressure route has been utilized to prepare high-performance BaTiO3 films, achieving the highest remanent polarization and high Curie temperature. The negative chemical pressure imposed during the process significantly enhances the bonding states and contributes to the improved polarization.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Liang Zhu, Lei Gao, Lifen Wang, Zhi Xu, Jianlin Wang, Xiaomin Li, Lei Liao, Tongtong Huang, Hailing Huang, Ailing Ji, Nianpeng Lu, Zexian Cao, Qian Li, Ji-Rong Sun, Pu Yu, Xuedong Bai
Summary: This study reveals the atomic processes of the structural transition from SrFeO2.5 to SrFeO2, involving the rotation of FeO6 octahedra and FeO4 tetrahedra, as well as the nucleation and diffusion processes at the film/substrate interface.
CHEMISTRY OF MATERIALS
(2021)
Article
Multidisciplinary Sciences
Shengwei Zeng, Changjian Li, Lin Er Chow, Yu Cao, Zhaoting Zhang, Chi Sin Tang, Xinmao Yin, Zhi Shiuh Lim, Junxiong Hu, Ping Yang, Ariando Ariando
Summary: Superconductivity is observed in infinite-layer Ca-doped LaNiO2 thin films and their phase diagram is constructed. Unlike other nickelates, the undoped and underdoped films are entirely insulating, while a superconducting dome is observed in the overdoped regime. The Hall coefficient also changes at low temperature for highly doped samples.
Article
Nanoscience & Nanotechnology
Nathaniel J. Schreiber, Ludi Miao, Hari P. Nair, Jacob P. Ruf, Lopa Bhatt, Yorick A. Birkholzer, George N. Kotsonis, Lena F. Kourkoutis, Kyle M. Shen, Darrell G. Schlom
Summary: Epitaxial untwinned SrRuO(3) thin films grown on (110)-oriented DyScO3 substrates exhibit enhanced electrical properties and a high Curie temperature.
Article
Multidisciplinary Sciences
Dacen Waters, Ellis Thompson, Esmeralda Arreguin-Martinez, Manato Fujimoto, Yafei Ren, Kenji Watanabe, Takashi Taniguchi, Ting Cao, Di Xiao, Matthew Yankowitz
Summary: Moire patterns formed by stacking twisted atomically thin van der Waals crystals can modify the electronic properties of bulk graphitic thin films in a dual-gated device. At zero and small magnetic fields, transport is mediated by gate-tuneable moire and graphite surface states, as well as coexisting semimetallic bulk states. At high field, the moire potential hybridizes with the graphitic bulk states, creating a single quasi-two-dimensional hybrid structure. This study establishes twisted graphene-graphite as a new class of mixed-dimensional moire materials.
Article
Physics, Multidisciplinary
I. S. Burmistrov, I. Gornyi, A. D. Mirlin
Summary: This article discusses the formation mechanism of multifractal superconducting state and presents a theory of multifractal superconducting state in thin films. By deriving a modified Usadel equation, the study explores the impact of multifractal-enhanced superconductivity on low-energy physics and reveals strong mesoscopic fluctuations near the spectral gap in the superconducting state.
Article
Chemistry, Physical
Shailesh Kalal, Mukul Gupta, Rajeev Rawat
Summary: The study focused on the effects of nitrogen concentration on the structural and superconducting properties of niobium mononitride (NbN) thin films deposited using reactive magnetron sputtering of Nb at different partial pressures of N2. It was found that at low nitrogen concentrations, N atoms occupy interstitial sites within Nb leading to lattice distortion, while at intermediate nitrogen concentrations, nearly stoichiometric NbN phase emerges, and further nitridation results in expansion and distortion of NbN. High magnetic field resistivity measurements showed that optimal nitrogen concentration at R-N2 = 16% resulted in maximized superconducting transition temperature (Tc) and upper critical field (HC2(0)). Additionally, applying a radio frequency (rf) bias during the growth of NbN thin films enhanced adatom mobility leading to improved crystalline ordering and higher Tc of 13.2 K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
Zheng Ren, Hong Li, He Zhao, Shrinkhala Sharma, Ziqiang Wang, Ilija Zeljkovic
Summary: Using strain-engineered FeSe thin films, we discovered a local decoupling of electron nematicity and structural anisotropy, indicating stiffness of the nematic order parameter at the nanoscale, which contrasts with previous observations in Fe-based superconductors.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Dirk Hauschild, Linsey Seitz, Saba Gharibzadeh, Ralph Steininger, Nan Jiang, Wanli Yang, Ulrich Wilhelm Paetzold, Clemens Heske, Lothar Weinhardt
Summary: The impact of BABr surface treatment on double-cation perovskite thin film was studied, revealing modifications in the surface environment which can be crucial for optimizing the treatment and enhancing the performance of perovskite solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Miroslav Soroka, Josef Bursik, Radomir Kuzel, Lukas Horak, Jan Prokleska, Marek Vronka, Valentyn Laguta
Summary: This study reports the growth of epitaxial thin films of Sr2Co2Fe28O46 on a SrTiO3(111) substrate using a chemical solution deposition method. The orientation relationship between the film and substrate was determined to be (000l)X || (111)STO and [1120]X || [101]STO through X-ray diffraction analysis. The magnetization and magnetic domain structure were investigated using magnetic measurements and Lorentz transmission electron microscopy, revealing a spin reorientation transition and a change in magnetic anisotropy at different temperatures.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
G. T. Chavan, Nanasaheb M. Shinde, F. A. Sabah, Satish S. Patil, A. Sikora, V. M. Prakshale, S. S. Kamble, N. B. Chaure, L. P. Deshmukh, Ahyun Kim, Chan-Wook Jeon
Summary: A new chalcogenide semiconductor material, Cd1-x-yZnxCuySzSe1-z, was prepared using a non-vacuum deposition technique for photoelectrochemical solar cell applications, showing a high surface area and additional reactive sites, with the highest efficiency achieved at 1.60%. The material is highlighted for further studies.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jiashu Wang, William Powers, Zhan Zhang, Michael Smith, Bradlee J. McIntosh, Seul Ki Bac, Logan Riney, Maksym Zhukovskyi, Tatyana Orlova, Leonid P. Rokhinson, Yi-Ting Hsu, Xinyu Liu, Badih A. Assaf
Summary: This study investigates the behavior of candidate topological superconductor Sn1-xInxTe thin films in the presence of quantum confinement and lattice strain. The results reveal the coexistence of quantum interference effects and superconducting fluctuations above the critical temperature T-c. The analysis of normal state magnetoresistance indicates a transition from weak antilocalization to localization in the superconducting samples, suggesting that superconductivity primarily originates from charge carriers occupying trivial states. Additionally, a significant enhancement of conductivity is observed above T-c, indicating the presence of superconducting fluctuations.
Article
Chemistry, Multidisciplinary
Jiashu Wang, William Powers, Zhan Zhang, Michael Smith, Bradlee J. McIntosh, Seul Ki Bac, Logan Riney, Maksym Zhukovskyi, Tatyana Orlova, Leonid P. Rokhinson, Yi-Ting Hsu, Xinyu Liu, Badih A. Assaf
Summary: Research on strained Sn1-xInxTe thin films grown in the (111) plane reveals the potential hosting of Majorana zero modes and the existence of quantum interference effects and superconducting fluctuations in conductivity. The study also shows a crossover from weak antilocalization to localization in superconducting samples, indicating that superconductivity may mainly originate from charge carriers in strongly spin-orbit split trivial states. The observed significant increase in conductivity above T-c suggests the presence of superconducting fluctuations in the material.
Article
Chemistry, Physical
A. J. Salvador, I. T. Neckel, I. L. Graff, D. H. Mosca
Summary: The chemical disorder in magnetic shape memory alloys has a significant impact on their properties. This study deposited Ni2MnGa thin films on flexible glass substrates using DC magnetron sputtering and investigated the short-range order/disorder through X-ray absorption measurements. The results reveal the persistence of local tetragonal distortions, decrease of anti-site disorder, and substitutions between Ni and Ga atoms with increasing annealing temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Multidisciplinary
Han Yan, Zexin Feng, Peixin Qin, Xiaorong Zhou, Huixin Guo, Xiaoning Wang, Hongyu Chen, Xin Zhang, Haojiang Wu, Chengbao Jiang, Zhiqi Liu
ADVANCED MATERIALS
(2020)
Review
Materials Science, Multidisciplinary
Pei-Xin Qin, Han Yan, Xiao-Ning Wang, Ze-Xin Feng, Hui-Xin Guo, Xiao-Rong Zhou, Hao-Jiang Wu, Xin Zhang, Zhao-Guo-Gang Leng, Hong-Yu Chen, Zhi-Qi Liu
Article
Nanoscience & Nanotechnology
Zexin Feng, Han Yan, Xiaoning Wang, Huixin Guo, Peixin Qin, Xiaorong Zhou, Zuhuang Chen, Hui Wang, Zhengying Jiao, Zhaoguogang Leng, Zexiang Hu, Xin Zhang, Haojiang Wu, Hongyu Chen, Jingmin Wang, Tianli Zhang, Chengbao Jiang, Zhiqi Liu
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Zexin Feng, Peixin Qin, Yali Yang, Han Yan, Huixin Guo, Xiaoning Wang, Xiaorong Zhou, Yuyan Han, Jiabao Yi, Dongchen Qi, Xiaojiang Yu, Mark B. H. Breese, Xin Zhang, Haojiang Wu, Hongyu Chen, Hongjun Xiang, Chengbao Jiang, Zhiqi Liu
Summary: The realization of a two-dimensional electron gas on the surface of transparent BaSnO3 via oxygen vacancy creation results in high carrier density and room-temperature mobility. This 2DEG is highly sensitive to strain, exhibiting a significant resistance enhancement under a small in-plane biaxial compressive strain.
Article
Physics, Multidisciplinary
Ying Dong, Hui Wang, BingJie Liu, Xin Liu, JiaXiang Shang, ZhiQi Liu, TianLi Zhang, ChengBao Jiang
Summary: This study synthesized SmCox nanoparticles and proposed an evolution model for different morphological characteristics. The SmCo4.79 nanoparticles demonstrated ultrahigh coercivity and good alignment potential, which could be promising for applications in superstable or nanocomposite magnets.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Multidisciplinary Sciences
Lingjia Meng, Zhang Zhou, Mingquan Xu, Shiqi Yang, Kunpeng Si, Lixuan Liu, Xingguo Wang, Huaning Jiang, Bixuan Li, Peixin Qin, Peng Zhang, Jinliang Wang, Zhiqi Liu, Peizhe Tang, Yu Ye, Wu Zhou, Lihong Bao, Hong-Jun Gao, Yongji Gong
Summary: The discovery of air-stable 2D metallic 1T-CrTe2 ultrathin crystals with long-range ferromagnetic ordering through chemical vapor deposition has provided insights into the change of magnetic properties due to weakening of Coulomb screening in the two-dimensional limit. The study showed a monotonic increase of Curie temperature with decreasing thickness, and a shift of the easy axis from in-plane to out-of-plane as thickness is reduced. The robust anomalous Hall effect confirmed the ferromagnetic ordering in these materials, which is rarely observed in other layered 2D materials grown by chemical vapor deposition.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Condensed Matter
Xiaorong Zhou, Zhiqi Liu
Summary: This study compared magnetotransport of amorphous and oxygen-annealed crystalline LaAlO3/SrTiO3 heterostructures at relatively high temperatures, finding that electrons from oxygen vacancies are localized at low temperatures and act as magnetic centers.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Xiao-Rong Zhou, Ze-Xin Feng, Pei-Xin Qin, Han Yan, Xiao-Ning Wang, Pan Nie, Hao-Jiang Wu, Xin Zhang, Hong-Yu Chen, Zi-Ang Meng, Zeng-Wei Zhu, Zhi-Qi Liu
Summary: The study presents experimental results on a 14-nm-thick superconducting Nd0.8Sr0.2NiO2/SrTiO3 thin-film heterostructure, revealing key performance characteristics such as a relatively small critical current density and complex magnetotransport properties.
Article
Chemistry, Multidisciplinary
Xiaorong Zhou, Xiaowei Zhang, Jiabao Yi, Peixin Qin, Zexin Feng, Peiheng Jiang, Zhicheng Zhong, Han Yan, Xiaoning Wang, Hongyu Chen, Haojiang Wu, Xin Zhang, Ziang Meng, Xiaojiang Yu, Mark B. H. Breese, Jiefeng Cao, Jingmin Wang, Chengbao Jiang, Zhiqi Liu
Summary: This paper reports the successful synthesis of a series of superconducting Nd0.8Sr0.2NiO2 thin films and the observation of a large exchange bias effect between the superconducting films and a thin ferromagnetic layer, indicating the existence of antiferromagnetic order. These experimental results are fundamentally critical for the current field.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xin Zhang, Pei-Xin Qin, Ze-Xin Feng, Han Yan, Xiao-Ning Wang, Xiao-Rong Zhou, Hao-Jiang Wu, Hong-Yu Chen, Zi-Ang Meng, Zhi-Qi Liu
Summary: This study reports the optimization of epitaxial growth of a tetragonal perpendicularly magnetized ferrimagnet Mn2Ga, as well as the successful integration of high-quality epitaxial Mn2Ga thin films onto a ferroelectric single crystal. The anomalous Hall effect of this ferrimagnet can be effectively modulated by a small electric field over a large temperature range in a nonvolatile manner. This work demonstrates the great potential of ferrimagnets for developing high-density and low-power spintronic devices.
Article
Chemistry, Multidisciplinary
Peixin Qin, Han Yan, Benshu Fan, Zexin Feng, Xiaorong Zhou, Xiaoning Wang, Hongyu Chen, Ziang Meng, Wenhui Duan, Peizhe Tang, Zhiqi Liu
Summary: This study demonstrates the modulation of carrier density in an ultrathin noncollinear antiferromagnetic film, leading to the complete shutdown of the anomalous Hall effect.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaorong Zhou, Peixin Qin, Zexin Feng, Han Yan, Xiaoning Wang, Hongyu Chen, Ziang Meng, Zhiqi Liu
Summary: The emergence of infinite-layer superconducting nickelate thin films has sparked a surge of studies, but the slow experimental progress due to challenging sample fabrication is hindering the development of theoretical research. This review provides a timely and comprehensive overview of the experimental progress and key issues in this emerging field, aiding researchers in capturing the major advancements.
Article
Materials Science, Multidisciplinary
Hongyu Chen, Zexin Feng, Han Yan, Peixin Qin, Xiaorong Zhou, Huixin Guo, Xiaoning Wang, Haojiang Wu, Xin Zhang, Ziang Meng, Zhiqi Liu
Summary: Unexpected weak anomalous Hall effect was found in polycrystalline thin films of chromium, possibly attributed to noncollinear spin textures induced by local spin frustration and rearrangement. A dominant intrinsic Berry phase mechanism is speculated. This may be a general feature for collinear antiferromagnetic thin-film materials with moderately high defect concentrations, making them promising candidates for emergent antiferromagnetic spintronics.
Article
Materials Science, Multidisciplinary
Huixin Guo, Zexin Feng, Peixin Qin, Han Yan, Xiaorong Zhou, Shuai Hu, Xiaoning Wang, Xin Zhang, Haojiang Wu, Hongyu Chen, Xuepeng Qiu, Zhiqi Liu
Summary: This study successfully fabricated epitaxial single-crystal ferrimagnetic Mn3Ga thin films and investigated their magnetic properties and interactions with other materials. The research discovered the unique properties of this perpendicular magnetized material, paving the way for future studies in the field of spintronics.
EMERGENT MATERIALS
(2021)