Article
Materials Science, Multidisciplinary
Can Wang, Yu-hua Wang, Xin Wu, Xiao-kang Li, Jing-wei Luo
Summary: The Mo2N nano-films were successfully obtained through high-temperature nitriding of Mo films prepared by RF magnetron sputtering, with a strict stoichiometric ratio of Mo:N=2:1. This method is the first to directly nitride Mo films to achieve Mo2N nano-films, showing superconducting effects at 3.8K.
Article
Materials Science, Multidisciplinary
SangEun Han, Daniel J. Schultz, Yong Baek Kim
Summary: Non-Fermi liquid and quantum critical behaviors are exhibited in rare-earth metallic systems with non-Kramers local moments supporting various multipolar moments. A study of the Bose-Fermi Kondo model reveals critical points between non-Fermi liquid Kondo fixed points and a quadrupolar ordered fixed point, indicating a competition between non-Fermi liquid states and multipolar-ordered phases induced by the RKKY interaction. Higher order corrections in the octupolar susceptibility can distinguish these critical points, implying a rich expansion of phases in multipolar heavy fermion systems.
Article
Chemistry, Physical
Koki Kinami, Yuji Hanada, Masanori Nagao, Akira Miura, Shigeto Hirai, Yuki Maruyama, Satoshi Watauchi, Isao Tanaka
Summary: Sm(O,F)BiS2 superconducting single crystals with various nominal F contents were successfully grown using KI-KCl flux, with a solid solution limit of F at the O-site of less than 20 at%. Despite similar F concentration and c-axis lattice constants, the F concentrations in the single crystals were hardly controlled by nominal F contents, suggesting the presence of an intrinsic stable phase. The superconducting transition temperature increased with increasing nominal F contents within less than 70 at% in the O-site.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Libin Wang, Chuan Xu, Zhen Liu, Zhibo Liu, Zixuan Yang, Hui-Ming Cheng, Wencai Ren, Ning Kang
Summary: This study presents low-temperature electronic transport measurements of high quality ultrathin Mo2C crystals, revealing the presence of multiple superconducting phases induced by nanoscale domain structures. An anomalous resistance peak near the onset of the superconducting transition is observed, which is interpreted as a consequence of nonequilibrium charge imbalance near the domain boundaries. The magnetic field-tuned superconductor-metal transition for ultrathin Mo2C crystals exhibits scaling behavior consistent with the appearance of quantum Griffiths singularity in 2D superconducting systems.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wen Wan, Darshana Wickramaratne, Paul Dreher, Rishav Harsh, Igor I. Mazin, Miguel M. Ugeda
Summary: This study investigates the evolution of the electronic ground state of a monolayer of Nb1-delta Mo delta Se2 across the entire alloy composition range. It is found that Mo doping decreases the density of states at the Fermi level and the magnitude of pair-breaking spin fluctuations. These results have significant implications for future 2D materials design.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
F. Antoncik, M. Lojka, T. Hlasek, J. Sklenka, O. Jankovsky, D. Sedmidubsky
Summary: We have developed a simple method for recycling silver from end-of-life and failed REBCO bulks, which can be used for manufacturing EuBCO single-domain bulks with no significant differences in superconducting properties compared to commercial Ag2O. This method has the potential to increase the cost-competitiveness and adoption of REBCO/Ag products.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Chemistry, Multidisciplinary
Yun Li, Yee Yan Tay, Pio J. S. Buenconsejo, William Manalastas Jr, Wei Han Tu, Hong Kit Lim, Teddy Salim, Michael O. Thompson, Srinivasan Madhavi, Chor Yong Tay, Kwan W. Tan
Summary: High entropy materials composed of different elements have great potentials in various fields and applications. However, developing rapid synthesis routes and understanding their transformative behaviors for unexpected properties remains challenging.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Condensed Matter
Ilnur Gimazov, Airat Kiiamov, Andrey Sadakov, Nikolai Lyadov, Dmitriy Chareev, Aleksander Vasiliev, Yurii Talanov
Summary: Precipitated phases formed by spinodal decomposition were found in Fe1+y Te1-x Se x crystals during long-term storage in a desiccator in dry atmosphere, as revealed by X-ray diffraction (XRD) study. The formation of a modulated structure in the entire volume of the sample and strain in the crystal structure resulted in significant improvement in the superconducting characteristics.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
R-Z Lin, C-L Huang
Summary: In this study, a hyperscaling analysis was conducted on thermodynamic measurements of Ni1-xRhx (x = 0.375) as a function of temperature and magnetic field. A ferromagnetic quantum critical point was identified, and the obtained critical exponents are in agreement with the theory proposed by Belitz, Kirkpatrick, and Vojta for a disorder-tuned quantum critical point in the preasymptotic region.
Article
Chemistry, Physical
S. O. Rogachev, R. Sundeev, S. A. Nikulin
Summary: The study shows that high-pressure torsion has a significant impact on the structure and microhardness of Zr-2.5% Nb alloy, refining the grains, increasing crystal defects, and inducing phase transformations, leading to an increase in microhardness. Annealing of the HPT-processed alloy samples results in softening due to phase transformations and grain growth. The HPT-processed Zr-2.5% Nb alloy exhibits reduced omega-Zr phase and increased thermal stability, making it advantageous for medical applications compared to other commercial zirconium alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Vyacheslav Solovyov, Hyunwoo Kim, Paul Farrell
Summary: In this study, we investigated the impact of parasitic ground plane resonances on the performance of coplanar waveguides made from YBCO-on-Kapton material. It was found that dense rows stitching vias are essential for isolating the lines below 60 dB at 6 GHz. We demonstrated a metalized via technology compatible with both traditional Flexible Printed Circuit (FPC) process and epitaxial YBCO material. It was shown that stitching via fence with a via period of 10 mm effectively suppresses parasitic resonances at 77 K.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
Runar Mellerud, Christian Hartmann, Casper Leonard Klop, Sindre Austad, Jonas Kristiansen Noland
Summary: This article presents the design and analysis of a 2.5-MW electric motor using REBCO high-temperature superconductors. The motor employs a slotted armature and requires cryogenic cooling due to the AC losses induced in the superconductors. The aim is to design a machine with low losses and realistic cooling, surpassing current technology. The design choices and the impact of operating conditions on high-temperature superconductors are discussed. The final design achieves high torque density and efficiency.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Multidisciplinary
B. Poudel, C. Lacroix, G. Zwicknagl, S. Burdin
Summary: The study focuses on the Kondo alloy model on a square lattice and investigates how different parameters affect photoemission properties, revealing various features in the paramagnetic Kondo phase, including transitions and crossovers.
NEW JOURNAL OF PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Gerda Rogl, Sanyukta Ghosh, Lei Wang, Jiri Bursik, Andriy Grytsiv, Michael Kerber, Ernst Bauer, Ramesh Chandra Mallik, Xing-Qiu Chen, Michael Zehetbauer, Peter Rogl
Article
Physics, Applied
Sahil Tippireddy, Sanyukta Ghosh, Rajan Biswas, Titas Dasgupta, Gerda Rogl, Peter Rogl, Ernst Bauer, Ramesh Chandra Mallik
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
O. Shved, L. P. Salamakha, S. Mudry, O. Sologub, P. F. Rogl, E. Bauer
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Chemistry, Physical
Xinlin Yan, Pavel Broz, Jan Vrestal, Jiri Vlach, Jiri Bursik, Martina Mazalova, Jana Pavlu, Bedrich Smetana, Gerda Rogl, Markus Eiberger, Andriy Grytsiv, Herwig Michor, Herbert Mueller, Gerald Giester, Peter Rogl
Summary: The constitution of the two phase diagrams Nb-Mn and Ta-Mn has been determined using various methods, revealing the characteristics of binary compounds, congruent melting, and eutectic reactions. The detailed distribution of atom sites in the Laves phases has been established.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Riccardo Freccero, Serena De Negri, Gerda Rogl, Georg Binder, Herwig Michor, Peter F. Rogl, Adriana Saccone, Pavlo Solokha
Summary: The chemical bonding and physical properties of La2Pd3Ge5 and Nd2Pd3Ge5 compounds were analyzed, with both showing metallic-like behavior.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
V. V. Romaka, G. Rogl, V Bursikova, J. Bursik, H. Michor, A. Grytsiv, E. Bauer, G. Giester, P. Rogl
Summary: Physical properties of three single-phase compounds with slightly nonstoichiometric compositions have been defined, and their metallic-like electrical resistivity and specific heat characteristics have been analyzed. The crystalline structures of these compounds have been studied through X-ray single crystal and TEM analyses, revealing similar metallic conductivity and dominant scattering from static defects.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexander Pekarsky, Herwig Michor, Oliver Spadiut
Summary: Recent studies have shown that MagR does not induce measurable, permanent magnetic moment in cells at low temperatures, indicating its limited usability for cell magnetization. Furthermore, there is limited usability for magnetic bead-based protein purification. This study bridges the current knowledge gap between theoretical considerations and empirical data on the MagR protein.
Article
Multidisciplinary Sciences
Fabian Garmroudi, Michael Parzer, Alexander Riss, Andrei V. Ruban, Sergii Khmelevskyi, Michele Reticcioli, Matthias Knopf, Herwig Michor, Andrej Pustogow, Takao Mori, Ernst Bauer
Summary: Researchers have discovered a rare and unique molecular structure that can be manipulated by changing temperature and pressure, offering new possibilities for the manufacture of novel materials.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Leonid Salamakha, Oksana Sologub, Berthold Stoeger, Herwig Michor, Ernst Bauer, Peter Rogl, Stepan Mudry
Summary: The existence of new ternary compounds Y6Pt13X4 (X = Al, Ga) with the site occupancy variant of the subnitride Ba6Na16N has been discovered for the first time. The striking structural units in these compounds are platinum centered [PtY6] octahedra interconnected via Y-Y bonds and embedded in the XPt3 framework. The electronic band structures and bonding analysis suggest that these compounds are metallic in nature, with a mixture of electrostatically driven interactions and metallic bonding.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Marta Roman, Maria Fritthum, Berthold Stoeger, Devashibhai T. Adroja, Herwig Michor
Summary: Single crystals of TmNiC2 were grown and studied by various techniques. The results showed a second-order phase transition at TCDW ~ 375 K, which affected a significant part of the Fermi surface. Microscopic neutron scattering techniques complemented the macroscopic measurements, revealing the crystal field eigenstates and eigenvalues.
Article
Materials Science, Multidisciplinary
F. Garmroudi, M. Parzer, M. Knopf, A. Riss, H. Michor, A. V. Ruban, T. Mori, E. Bauer
Summary: The experimental results on disorder-tuned Fe2VAl0.9Si0.1 alloys and realization of metastable A2 structure in bulk Fe2VAl-based alloys provide insights into the structure-property relationship of Heusler compounds. The study shows that increasing disorder leads to a gradual transition from a semimetal/narrow-gap semiconductor to a metal, and the disordered A2 phase exhibits a large anomalous Hall effect due to side-jump scattering of charge carriers at the antisite magnetic moments.
Article
Materials Science, Multidisciplinary
L. Salamakha, O. Sologub, A. Riss, H. Michor, H. Mueller, B. Stoeger, G. Giester, P. Rogl, A. Sakai, P. Gegenwart, E. Bauer
Summary: Novel ternary platinum borides YbPt5B2 and LuPt5B2 were synthesized and their crystal structures and electronic properties were investigated. YbPt5B2 exhibits heavy fermion behavior, while LuPt5B2 shows typical metallic behavior.
Article
Materials Science, Multidisciplinary
Yukihiro Kawamura, Shingo Deminami, Keiki Takeda, Toshihiro Kuzuya, Leonid Salamakha, Herwig Michor, Ernst Bauer, Jun Gouchi, Yoshiya Uwatoko, Tatsuya Kawae, Chihiro Sekine
Summary: The crystallographic and physical properties of the filled skutterudite superconductor SrOs4P12, including its metallic nature, multiple superconducting transitions, and sensitivity to magnetic fields and pressure, are studied through experiments and calculations.