Article
Physics, Applied
K. P. Sajilesh, R. P. Singh
Summary: Ternary noncentrosymmetric superconductors TaXSi (X = Re, Ru) were investigated by magnetization, resistivity, and specific heat measurements. They crystallize in the orthorhombic TiFeSi-type structure and exhibit superconducting transition temperatures of 5.32 K and 3.91 K for TaReSi and TaRuSi, respectively. The low specific heat jump and concave nature of the upper critical field suggest a nontrivial superconducting gap.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Lyudmila V. Begunovich, Maxim M. Korshunov
Summary: The band structure and Fermi surface of the recently discovered superconductor (EMIM)(x)FeSe have been studied using density functional theory in the generalized gradient approximation. It is found that the bands near the Fermi level are primarily formed by Fe-d orbitals. Although there is no direct contribution of EMIM orbitals to the near-Fermi level states, the presence of organic cations leads to a shift in the chemical potential, resulting in the appearance of small electron pockets in the quasi-two-dimensional Fermi surface of (EMIM)(x)FeSe.
Article
Materials Science, Multidisciplinary
Sheemol Valayampillil Narayanan, Muthusundar Kumar, Ananthakumar Solaiappan
Summary: This study investigates the impact of iron oxide on the properties of yellow colorant made from pyrochlore type lanthanum zirconate (La2Zr2O7) and its application in multifunctional glaze coatings. The study examines the morphological, optical, and solar heat reflection properties of the yellow colorant and presents the surface properties, reflectivity, and tinting behavior of the glaze coating. The findings suggest that pyrochlore La2Zr2O7 is a promising candidate for ceramic functional materials and coatings with sustained energy savings, opening up new possibilities for functional glaze coating applications using pyrochlore type ceramic materials.
Review
Physics, Condensed Matter
Ya-Bin Liu, Yi Liu, Guang-Han Cao
Summary: This paper discusses the coexistence and interaction between superconductivity and ferromagnetism in iron-based materials. Through the study of doped iron pnictides and iron-based superconductors, a new material basis has been discovered. These materials exhibit both superconductivity and ferromagnetism at specific temperatures, which is of great significance for understanding the correlation between superconductivity and ferromagnetism.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Nikita S. Pavlov, Kirill S. Pervakov, Igor A. Nekrasov
Summary: By using a first-principles DFT/GGA approach, the electronic structure, magnetism, and Fermi surface of the potential iron-based superconductor KCa2Fe4As4O2 (12442) were investigated. The self-doping value of KCa2Fe4As4O2 was found to be 0.75 hole on Fe-3d states. Surprisingly, it was observed that in addition to the Fe-3d bands, the O-2p bands also cross the Fermi level in KCa2Fe4As4O2, which is unusual for O-2p states. The presence of a metallic O-2p band in KCa2Fe4As4O2 suggests that it may be a potential superconductor with unique properties.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Guorui Xiao, Siqi Wu, Baizhuo Li, Bin Liu, Jifeng Wu, Yanwei Cui, Qinqing Zhu, Guang-han Cao, Zhi Ren
Summary: ThIr2 is a weak coupling type-II superconductor with a fully isotropic superconducting gap. Electronic correlation is suggested to be important in ThIr2 based on its specific heat coefficient, upper critical field, Ginzburg-Laudau parameter, Wilson ratio, and Kadowaki-Woods ratio. The valence band states in ThIr2 are dominated by Ir-5d orbitals, with significant hybridizations with Ir-6p, Th-6d, and 7p orbitals at the Fermi level.
Article
Physics, Multidisciplinary
Di Liu, Xingyu Wang, Zezhong Li, Xiaoyan Ma, Shiliang Li
Summary: Uniaxial pressure or strain can distort the lattice and change the ground states of a material. The unique feature of uniaxial-pressure measurements is the ability to apply a tensile force and achieve negative pressure. By reducing the width of the sample using focused ion beam, we can significantly increase the effective pressure and improve the upper limit of pressure for the uniaxial-pressure devices.
Article
Physics, Applied
Giovanni Alberto Ummarino, Daniele Torsello
Summary: Experimental data from the recently discovered iron-based superconductor KCa2Fe4As4F2 is analyzed within a realistic five-band s(+/-) Eliashberg model with coupling provided by antiferromagnetic spin fluctuations. The study deduces fundamental parameters and calculates various physical properties, highlighting the peculiar behavior of this new compound where s and d-wave characters might coexist and the electron band is close to vanish.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Alexandros Deltsidis, Laura Simonelli, Georgios Vailakis, Izar Capel Berdiell, Georgios Kopidakis, Anna Krzton-Maziopa, Emil S. Bozin, Alexandros Lappas
Summary: In this work, synchrotron X-ray absorption and emission spectroscopies were used to investigate the correlation between interlayer spacing and enhancement of superconducting critical temperature in the molecule-intercalated Li-x(C5H5N)(y)Fe2-zSe2. The results showed that Fe-site vacancies and the resulting local lattice modifications contribute to the improvement of superconductivity by alleviating electron-lattice correlations. This study provides insights into the doping-induced changes in the electronic and structural properties of the inorganic host.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Amrithakrishnan Bindhu, Jawahar I. Naseemabeevi, Subodh Ganesanpotti
Summary: This study presents an optimal strategy for achieving white emission in a single-phase phosphor matrix with high quantum efficiency and full spectrum emission. Cationic substitution and structural changes were used to achieve blue and red shifts. The resulting phosphor showed a quantum efficiency of 52% and excellent thermal stability. Bright white light-emitting diode devices were fabricated with a high quantum efficiency of 74% and achieved high color purity, low color temperature, and high color rendering index.
INORGANIC CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
A. Augieri, A. Duchenko, A. Angrisani Armenio, L. Barba, J. R. Plaisier, L. Gigli, A. Masi, F. Rizzo, A. Rufoloni, A. Vannozzi, F. Varsano, A. Ciccioli, G. Celentano
Summary: The 1144 family of superconductors has attracted attention due to their ability to form lattice defects that improve flux pinning properties. Research is being conducted to optimize these materials for low-temperature high-field conditions. Recent experiments have shown that the 1144 structure can be modified to create a doped compound with a different chemical formula, without affecting the critical temperature values. XRD and SEM analyses revealed that the structure and morphology of the compound were unaffected by the doping. However, the magnetic properties exhibited a clear change in the in-field behavior, which requires further investigation.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Condensed Matter
Tsadik Kidanemariam, Gebregziabher Kahsay
Summary: In this research work, the theoretical study of the superconducting properties in the iron-based superconductor Ba1-xKxFe2As2 is investigated. The mathematical expressions and phase diagrams for the superconducting order parameters, transition temperature, density of states, and condensation energy are derived. The obtained results show enhanced superconducting order parameter and transition temperature, which are consistent with previous experimental findings.
EUROPEAN PHYSICAL JOURNAL B
(2023)
Article
Engineering, Electrical & Electronic
Thanatheepan Balachandran, Andy Yoon, Dongsu Lee, Jianqiao Xiao, Kiruba S. Haran
Summary: Offshore wind turbines are crucial for increasing the use of green energy in the electricity market. Superconducting wind turbine generators offer higher air-gap flux density and power density. This article proposes a hybrid design approach to achieve high field and high efficiency offshore wind turbines.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Physical
Anil Kumar, M. Kamal Warshi, Archna Sagdeo, P. R. Sagdeo
Summary: This study investigates Cr-doped PrFeO3 ceramics and proposes a correlation between Goldschmidt structural tolerance factor, structural bandwidth, and e(g) electron bandwidth. Experimental and theoretical findings suggest a mechanism involving orbital-facilitated charge transfer, enhancing the understanding of the relationship between these parameters.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Shantanu Misra, Bartlomiej Wiendlocha, Janusz Tobola, Petr Levinsky, Jiri Hejtmanek, Sylvie Migot, Jaafar Ghanbaja, Anne Dauscher, Bertrand Lenoir, Christophe Candolfi
Summary: The study investigates the normal-state transport properties and superconductivity of the Sn1.03-delta-xInxTe alloy. It finds that the distortion of the valence-band structure by the In-induced resonant level has a profound influence on the material's properties and the emergence of superconductivity.
Article
Chemistry, Physical
Maria Markina, Tatyana Vasilchikova, Elena Kuznetsova, Peter Berdonosov, Andrey Olenev, Seung Hwan Chung, Hyun-Joo Koo, Myung-Hwan Whangbo, Alexander Vasiliev
Summary: We synthesized and characterized the solid solutions Cu3Bi(Se(1-x)TexO(3))(2)O2Br (x = 0, 0.25, 0.5, 0.75, 1) for the first time. The interlayer antiferromagnetic (AFM) coupling in francisites was found to be due to interlayer high-spin orbital interaction across the van der Waals (vdW) gaps rather than interlayer spin exchange. We proposed a method to modify francisites to create oxide vdW ferromagnets.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Maxim A. Blagov, Nataliya G. Spitsyna, Nikolai S. Ovanesyan, Anatolii S. Lobach, Leokadiya V. Zorina, Sergey V. Simonov, Konstantin V. Zakharov, Alexander N. Vasiliev
Summary: A new iron(III) anionic complex based on a pyruvic acid thiosemicarbazone ligand has been synthesized and characterized. The compound exhibits a spin-crossover transition from the low-spin to the high-spin state above 250 K. It was also found that the lithium cation has an influence on the stabilization of the low-spin state.
DALTON TRANSACTIONS
(2023)
Article
Physics, Applied
Y. A. Ovchenkov, D. A. Chareev, D. E. Presnov, O. S. Volkova, A. N. Vasiliev
Summary: In this study, the transport properties of FeSe1-xTex and pure FeSe crystals were compared. The results showed significant differences in structural transitions and temperature dependence between the two, suggesting a change in the ground state and the presence of quantum criticality. Furthermore, the phase diagram of FeSe1-xTex at low x resembled that of FeSe under pressure.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Letter
Chemistry, Multidisciplinary
Arthur Veyrat, Valentin Labracherie, Dima L. Bashlakov, Federico Caglieris, Jorge I. Facio, Grigory Shipunov, Titouan Charvin, Rohith Acharya, Yurii Naidyuk, Romain Giraud, Jeroen van den Brink, Bernd Buechner, Christian Hess, Saicharan Aswartham, Joseph Dufouleur
Summary: In this study, it is predicted that broken inversion symmetry and strong spin-orbit coupling in trigonal PtBi2 lead to a type-I Weyl semimetal band structure. Transport measurements reveal unusually robust low dimensional superconductivity in thin exfoliated flakes of PtBi2, with thickness up to 126 nm and critical temperature (T-c) ranging from 275-400 mK. A Berezinskii-Kosterlitz-Thouless transition with critical temperature (T-BKT) around 310 mK is observed in up to 60 nm thick flakes, which is significantly thicker than rare examples of two-dimensional superconductors exhibiting such a transition. PtBi2 thus provides an ideal platform to study low dimensional and unconventional superconductivity in topological semimetals.
Article
Chemistry, Physical
Alisher F. Murtazoev, Konstantin A. Lyssenko, Maria M. Markina, Valery A. Dolgikh, Alexander N. Vasiliev, Peter S. Berdonosov
Summary: A new family of compounds with the formula ACu(7)TeO(4)(SO4)(5)Cl (A=Na, K, Rb, Cs) isostructural to mineral Nabokoite (K species) was synthesized and characterized. These compounds exhibit interesting properties as quasi-two-dimensional magnets with a square kagome lattice geometry. The presence of wavy and distorted triangles in the lattice, along with additional magnetic ions, adds complexity to the magnetism of these compounds. The interaction of the magnetic ions through virtual excitations of the lattice leads to the coexistence of long-range magnetic order and spin liquid behavior.
Correction
Chemistry, Multidisciplinary
Dmitriy A. A. Chareev, Md Ezaz Hasan Khan, Debjani Karmakar, Aleksey N. N. Nekrasov, Maximilian S. S. Nickolsky, Olle Eriksson, Anna Delin, Alexander N. N. Vasiliev, Mahmoud Abdel-Hafiez
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Dmitriy A. Chareev, Md Ezaz Hasan Khan, Debjani Karmakar, Aleksey N. Nekrasov, Maximilian S. Nickolsky, Olle Eriksson, Anna Delin, Alexander N. Vasiliev, Mahmoud Abdel-Hafiez
Summary: Transition metal dichalcogenides (TMDs) are a class of low-dimensional materials with growing applications in nanoelectronics. This study presents an efficient synthetic route for a large number of TMDs using sulfuric vapor transport and liquid sulfur. The obtained single crystals exhibit high-quality physical and electronic properties, making them suitable for emerging electronic devices.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Physics, Multidisciplinary
T. E. Kuzmicheva, S. A. Kuzmichev, K. S. Pervakov, V. A. Vlasenko
Summary: We compare the structure of superconducting order parameter of overdoped BaFe1.88Ni0.12As2 and underdoped BaFe1.92Ni0.08As2 pnictides with similar T-c around 18.0-18.3 K. Using spectroscopy, we directly determine the magnitudes of the two microscopic superconducting order parameters and discuss their similarity, difference, and possible influence of antiferromagnetic phase on superconducting properties.
Article
Chemistry, Multidisciplinary
Marwa H. A. Aouelela, Mohamed Taha, Samaa I. El-dek, Abdelwahab Hassan, Alexander N. Vasiliev, Mahmoud Abdel-Hafiez
Summary: During the past decade, two-dimensional layered materials have attracted much attention due to their unique physical and electronic properties, providing new opportunities for the exploration of novel physics and devices. Among these materials, iron selenide has become a focus of interest for physicists as a potential platform for developing new superconductors. Chemical doping is a powerful approach to manipulate and optimize the electronic structure and physical properties of materials. This study investigates the effects of molybdenum and sulfur doping on the physical properties of FeSe through complementary measurements and theoretical calculations, offering insights into the influence of doping on the superconducting properties of FeSe.
Article
Chemistry, Inorganic & Nuclear
A. F. Murtazoev, P. S. Berdonosov, K. A. Lyssenko, V. A. Dolgikh, M. Y. Geidorf, O. S. Volkova, H. -J Koo, M. -H Whangbo, A. N. Vasiliev
Summary: We synthesized a new compound, Co-3(SeO3)(SeO4)(OH)(2), with a kagome-like arrangement of Co2+ ions. The compound exhibits three successive magnetic transitions at low temperatures and a 1/3-magnetization plateau. The magnetic phase diagram shows three magnetic phases, with phase I being antiferromagnetic and phases II and III being responsible for the 1/3-magnetization plateau. To understand these magnetic properties, spin-polarized DFT+U calculations were performed to evaluate the spin exchanges in the compound.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Alisher F. Murtazoev, Peter S. Berdonosov, Konstantin A. Lyssenko, Valery A. Dolgikh, Zlata V. Pchelkina, Konstantin V. Zakharov, Michael Y. Geidorf, Tatyana M. Vasilchikova, Olga S. Volkova, Alexander N. Vasiliev
Summary: Anhydrous copper tellurite sulfate, Cu3TeO3(SO4)(2), was synthesized via vapor transport reactions in sealed silica glass ampoules. Various measurements revealed long-range antiferromagnetic order at T-N = 13 K and established an H-T magnetic phase diagram. Density functional theory calculations provided estimations of leading exchange interaction parameters.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Roman V. Bazhan, Vladimir B. Nalbandyan, Tatyana M. Vasilchikova, Hyun-Joo Koo, Myung-Hwan Whangbo, Alexander N. Vasiliev
Summary: The missing member of the rosiaite family, CoGeTeO6, was synthesized and characterized. It exhibits short- and long-range magnetic ordering at different temperatures and its magnetic structure consists of three-dimensional antiferromagnetic lattices. The experimental and computational results show good agreement under different ion treatments.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Aleksandr Sh. Samarin, Ivan A. Trussov, Zlata V. Pchelkina, Stanislav S. Fedotov, Yevgeniy A. Ovchenkov, Sergei V. Zhurenko, Alexei V. Tkachev, Andrei A. Gippius, Larisa V. Shvanskaya, Alexander N. Vasiliev
Summary: A novel vanadium hydroxide-phosphate, NH4VPO4OH, has been synthesized hydrothermally at 230 degrees C. The compound shows a rare case of Haldane spin system with spin S=1 based on V3+ ions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
A. A. Vorobyova, K. A. Lyssenko, G. D. Chistyakov, I. V. Morozov, Y. A. Ovchenkov, T. M. Vasilchikova, H. -J. Koo, M. -H. Whangbo, O. S. Volkova, A. N. Vasiliev
Summary: This study reports the structure, magnetic and thermal properties of PyH)CsCo2(NO3)(6) crystals obtained from a nitric acid solution. The results reveal that the crystal exhibits long-range canted antiferromagnetic ordering and possesses easy-axis magnetic anisotropy.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Pingjun Ying, Lennart Wilkens, Heiko Reith, Nicolas Perez Rodriguez, Xiaochen Hong, Qiongqiong Lu, Christian Hess, Kornelius Nielsch, Ran He
Summary: The development of a tellurium-free compound for thermoelectric technology applications around room temperature is of great significance due to the toxicity and scarcity of tellurium. The research team has successfully developed a tellurium-free compound for near-room-temperature applications and achieved higher efficiency through process and doping optimizations.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
