Article
Materials Science, Multidisciplinary
M. Horio, X. Peiao, M. Miyamoto, T. Wada, K. Isomura, J. Osiecki, B. Thiagarajan, C. M. Polley, K. Tanaka, M. Kitamura, K. Horiba, K. Ozawa, T. Taniguchi, M. Fujita, I. Matsuda
Summary: We conducted an angle-resolved photoemission spectroscopy study on single-layer T*-type cuprate SmLa1-xSrxCuO4 with unique fivefold pyramidal oxygen coordination. With varying oxygen content, T*-SmLa1-xSrxCuO4 transitions from a Mott-insulating to a metallic state, breaking the Luttinger sum rule under the assumption of a large holelike Fermi surface. This behavior is different from the known doping evolution in the structural isomer La2-xSrxCuO4 with sixfold octahedral coordination. Additionally, we found that the empirical Tc rule for octahedral oxygen-coordination systems does not apply to T*-SmLa1-xSrxCuO4. These results highlight the unique properties of T*-type cuprates possibly attributed to its oxygen coordination and call for further investigation with careful evaluation of disorder effects.
Article
Chemistry, Multidisciplinary
Gernot Heine, Wolfgang Lang, Roman Roessler, Johannes D. Pedarnig
Summary: The resistivity and the Hall effect in the copper-oxide high-temperature superconductor YBa2Cu3O7-delta (YBCO) show significant anisotropy. Using a thin film of YBCO grown on an off-axis cut SrTiO3 substrate allows for investigation of these anisotropic transport properties. The results indicate that vicinal thin films may also be useful for studying other layered nanomaterials.
Article
Materials Science, Multidisciplinary
C. L. Zhang, X. He, Z. W. Li, S. J. Zhang, B. S. Min, J. Zhang, K. Lu, J. F. Zhao, L. C. Shi, Y. Peng, X. C. Wang, S. M. Feng, R. C. Yu, L. H. Wang, V. B. Prakapenka, S. Chariton, H. Z. Liu, C. Q. Jin
Summary: Studies on polyhydrides are attracting growing attentions recently due to their potential high temperature superconductivity. Here, the authors report the discovery of superconductivity in hafnium polyhydrides at high pressures, with the superconducting phase identified as C2/ m-HfH14 and a high Tc observed. This is the first 5d transition metal polyhydride superconductor with Tc above the liquid nitrogen temperature.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lingyong Zeng, Xunwu Hu, Yazhou Zhou, Mebrouka Boubeche, Ruixin Guo, Yang Liu, Si-Chun Luo, Shu Guo, Kuan Li, Peifeng Yu, Chao Zhang, Wei-Ming Guo, Liling Sun, Dao-Xin Yao, Huixia Luo
Summary: This study reports the electronic structure and superconductivity properties of Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx high-entropy ceramics, and discovers that it may be a topological superconductor. The results show that Ti0.2Zr0.2Nb0.2Mo0.2Ta0.2Cx exhibits high superconducting critical temperature and maintains its superconductivity under high pressure.
Article
Chemistry, Analytical
Mao Shen, Lei Chen, Shibin Ren, Yuxiang Chen, Wei Li, Rui Zheng, Yongqiang Lin, Deman Han
Summary: This study reports the synthesis of 3D CuO/PPy heterojunction nanowire arrays on Cu foam and demonstrates their superior performance as supercapacitor electrodes. By optimizing preparation conditions and electrodeposition time, excellent capacitance, cycling stability, and potential applications in asymmetric supercapacitors have been achieved.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Physics, Applied
Keita Takahashi, Hiroyuki Fujishiro, Mark D. Ainslie
Summary: This study introduces a new concept of a high gradient trapped field magnet (HG-TFM) made of (RE)BaCuO bulk superconductors, showing high magnetic field gradient values and the potential to create zero gravity space. The HG-TFM can serve as a compact and cryogen-free desktop magnetic source, with potential applications in life/medical science such as protein crystallization and cell culture.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Amir Shariffar, Haider Salman, Tanveer A. Siddique, M. Omar Manasreh
Summary: Copper oxide thin films are grown by oxidizing copper nanofilms at high annealing temperatures, leading to improved crystalline quality and photosensitivity. The fabricated device, annealed at 900 degrees C and with a bandgap of 2.8 eV, demonstrates high responsivity and detectivity, showing more than ten times higher photosensitivity compared to films annealed at 800 degrees C. The device functions as a visible-ultraviolet photodetector with uniform and stable performance maintained over an eight-week testing period.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Geochemistry & Geophysics
Xueqing Yin, Xinfu Zhao, Runsheng Yin, Lingjian Gao, Changzhou Deng, Zhendong Tian, Shengren Chang, Bernd Lehmann
Summary: This study investigates the Hg isotopic compositions of ore minerals from IOCG deposits in the Kangdian region, South China, and finds that the Hg components in the IOCG system are dominated by a lithospheric mantle source. The results shed light on deep Hg cycling and confirm the use of Hg isotopes as a tracer for metal sources in hydrothermal ore systems.
Article
Thermodynamics
J. Sathish Kumar, G. Senthilkumar, S. Ramachandran
Summary: The research aims to address the issue of poor thermal conductivity caused by the spherical form of CuO nanoparticles by using polyhedral-shaped MgO nanoparticles. The study introduces a novel approach of adding MgO nanoparticles to improve thermal conductivity and provides experimental data to support this strategy.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Physics, Applied
Rola F. Khattar, K. Habanjar, R. Awad, M. Anas
Summary: Lead (II) oxide (PbO) and lead (IV) oxide (PbO2) were used to partially substitute lead ions at the thallium (Tl) site in Tl-0.8-xHg(0.2)PbxBa(2)Ca(2)Cu(3)O(9)-d superconductor. The substitution did not affect the tetragonal structure, but increased the volume fraction. Vickers microhardness measurements showed the normal indentation size effect, and the proportional sample resistance model was the best model for interpreting the data.
JOURNAL OF LOW TEMPERATURE PHYSICS
(2023)
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, Chemical
Shufen Liu, Shenghai Yang, Tao Luo, Yongming Chen
Summary: The alkaline pressure oxidative leaching (APOL) method efficiently extracts tin, desulfurizes, dearsenifies, and separates tin and copper from Sn-Cu bearing residue, leading to the production of high-purity SnO2 and CuSO4·5H2O, economically and efficiently recycling valuable metals in an environmentally friendly way.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Bo-Hong Liu, Maximilian Huber, Matthijs A. van Spronsen, Miquel Salmeron, Hendrik Bluhm
Summary: By using ambient-pressure X-ray photoelectron spectroscopy (APXPS), we investigated the room-temperature chemisorption of oxygen on Cu(100) and Cu(111) surfaces. The results showed that Cu(100) is more active for oxygen dissociative chemisorption compared to Cu(111). The presence of a (2 root 2 x root 2)R45 degrees missing-row reconstruction layer on Cu(100) slows down the oxidation process.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
E. Hajialilou, H. Asgharzadeh, Sh. Khameneh Asl
Summary: In this study, TiO2 was hybridized with Cu2O and rGO to enhance its light absorption range and PEC activity. The characteristics of the TiO2/rGO/Cu2O hybrid were investigated using various techniques, and the PEC behavior of the ternary hybrid electrode was examined. The results showed a significant improvement in PEC activity with the addition of Cu2O and rGO, leading to a reduction in TiO2 band-gap energy and enhanced photoelectrochemical performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Rustem Khasanov, Igor I. Mazin
Summary: Pressure dependence on the thermodynamic critical field B-c in elemental aluminum was investigated, showing that the gap ratio decreases linearly with pressure increase. This suggests that in aluminum, the gap ratio is smaller than the weak-coupled BCS prediction and is further reduced under pressure.
Article
Chemistry, Multidisciplinary
Akira Iyo, Kenji Kawashima, Shigeyuki Ishida, Hiroshi Fujihisa, Yoshito Gotoh, Hiroshi Eisaki, Yoshiyuki Yoshida
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Physics, Applied
Masaki Mito, Yuichiro Kitamura, Takayuki Tajiri, Kazuma Nakamura, Ryo Shiraishi, Kazuma Ogata, Hiroyuki Deguchi, Tomiko Yamaguchi, Nao Takeshita, Terukazu Nishizaki, Kaveh Edalati, Zenji Horita
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
D. Kagerbauer, S. Ishida, V Mishev, D. Song, H. Ogino, H. Eisaki, M. Nakajima, A. Iyo, M. Eisterer
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
Akira Iyo, Izumi Hase, Hiroshi Fujihisa, Yoshito Gotoh, Nao Takeshita, Shigeyuki Ishida, Hiroki Ninomiya, Yoshiyuki Yoshida, Hiroshi Eisaki, Kenji Kawashima
PHYSICAL REVIEW MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Ryusei Takahama, Toi Ishii, Daigo Indo, Mitsutoshi Arizono, Chieko Terakura, Yoshinori Tokura, Nao Takeshita, Masaaki Noda, Hideki Kuwahara, Takuo Saiki, Takuro Katsufuji, Ryoichi Kajimoto, Tetsuji Okuda
PHYSICAL REVIEW MATERIALS
(2020)
Article
Chemistry, Physical
Akira Iyo, Izumi Hase, Hiroshi Fujihisa, Yoshito Gotoh, Nao Takeshita, Shigeyuki Ishida, Hiroki Ninomiya, Yoshiyuki Yoshida, Hiroshi Eisaki, Hishiro T. Hirose, Taichi Terashima, Kenji Kawashima
Summary: In the recently discovered antiperovskite phosphide (Ca,Sr)Pd3P, centrosymmetric (CS) and non-centrosymmetric (NCS) superconducting phases appear with a large difference in transition temperatures (T-c), primarily attributed to the decrease in N(0) associated with the structural phase transition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
S. Nishioka, T. Kouchi, F. Sakano, M. Yashima, H. Mukuda, M. Yogi, K. Yamaura, E. Takayama-Muromachi, S. Miyasaka, S. Tajima, H. Eisaki, A. Iyo, M. Kodani, T. Kakuto, J-H Lee, T. Kambe
Summary: We conducted NMR experiments on heavily electron-doped Fe-based superconductors and compared the results with the parent Fe-based compounds. The presence of AFM1 order was found to be universal in most parent Fe-based compounds, while static AFM2 order was absent but dynamic low-energy AFM spin fluctuations were enhanced at certain doping levels. Additionally, moderate spin fluctuations were observed at high temperatures in heavily electron-doped compounds. The study discussed the universality and diversity of the relationship between Tc and spin fluctuations characteristics in Fe-based compounds from a microscopic perspective of NMR measurements.
33RD INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2020)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
H. Kito, K. Kawashima, S. Ishida, K. Oka, H. Fujihisa, Y. Gotoh, A. Iyo, H. Ogino, H. Eisaki, Y. Yoshida
32ND INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2019)
(2020)
Article
Materials Science, Multidisciplinary
E. Nishibori, S. Karatsu, C. Terakura, N. Takeshita, M. Kinoshita, S. Ishiwata, Y. Tokura, S. Seki
Proceedings Paper
Materials Science, Multidisciplinary
A. Takahashi, S. Pyon, S. Okayasu, S. Ishida, A. Iyo, H. Eisaki, M. Imai, H. Abe, T. Terashima, T. Tamegai
31ST INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2018)
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
I. Hase, T. Yanagisawa, A. Iyo, H. Fujihisa, Y. Goto, H. Eisaki, K. Kawashima
31ST INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2018)
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
K. Iwakiri, T. Nishio, K. Kawashima, S. Ishida, K. Oka, H. Fujihisa, Y. Gotoh, I. Hase, A. Iyo, H. Ogino, H. Eisaki, Y. Yoshida, H. Kito
31ST INTERNATIONAL SYMPOSIUM ON SUPERCONDUCTIVITY (ISS2018)
(2019)
Article
Materials Science, Multidisciplinary
F. Sakano, K. Nakamura, T. Kouchi, T. Shiota, F. Engetsu, K. Suzuki, R. Horikawa, M. Yashima, S. Miyasaka, S. Tajima, A. Iyo, Y-F Guo, K. Yamaura, E. Takayama-Muromachi, M. Yogi, H. Mukuda
Article
Materials Science, Multidisciplinary
Shigeyuki Ishida, Akira Iyo, Hiraku Ogino, Hiroshi Eisaki, Nao Takeshita, Kenji Kawashima, Keiichi Yanagisawa, Yuuga Kobayashi, Koji Kimoto, Hideki Abe, Motoharu Imai, Jun-ichi Shimoyama, Michael Eisterer
NPJ QUANTUM MATERIALS
(2019)
Proceedings Paper
Physics, Applied
K. Kawashima, S. Ishida, K. Oka, H. Kito, N. Takeshita, H. Fujihisa, Y. Gotoh, K. Kihou, H. Eisaki, Y. Yoshida, A. Iyo
28TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT28)
(2018)