Article
Physics, Multidisciplinary
Da Wang, Jun-Qi Xu, Hai-Jun Zhang, Qiang-Hua Wang
Summary: The anomalous behavior of superfluid density in overdoped La2-xSrxCuO4 films has sparked a heated debate. While the linear drop of superfluid density at low temperatures suggests clean superconductors, the linear scaling between superfluid density (in the zero temperature limit) and the transition temperature is typical of the dirty limit in the BCS framework. This dichotomy can be explained by the role of increasing anisotropic scattering caused by the apical oxygen vacancies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Wenzheng Wei, Dung Vu, Zhan Zhang, Frederick J. J. Walker, Charles H. H. Ahn
Summary: We report on the superconductivity in Nd1-xEuxNiO2, where Eu is used as a 4f dopant. By employing an in situ molecular beam epitaxy reduction process, we achieve the superconducting phase, providing an alternative method to induce superconductivity in infinite-layer nickelates compared to the ex situ CaH2 reduction process. The Nd1-xEuxNiO2 samples exhibit a step-terrace surface structure, have a T-c onset of 21 K at x = 0.25, and show a large upper critical field possibly due to Eu 4f doping.
Article
Thermodynamics
S. G. Castillo-Lopez, C. Villarreal, R. Esquivel-Sirvent, G. Pirruccio
Summary: This theoretical study focuses on the near-field radiative heat transfer between high-T-c superconducting thin films, showing that thin films enhance heat transfer significantly compared to bulk plates. The optical response above and below T-c plays a crucial role, with the superconducting phase transition leading to a suppression of total heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Applied
T. D. Vethaak, F. Gustavo, T. Farjot, T. Kubart, P. Gergaud, S. -L. Zhang, F. Nemouchi, F. Lefloch
Summary: Thin films of superconducting V3Si were prepared by RF sputtering onto sapphire and oxide-coated silicon wafers, followed by rapid thermal processing. The superconducting properties improved with annealing temperature, but the critical temperature was consistently lower on the silicon wafers, with little dependence on annealing conditions. In situ XRD measurements revealed strain in the silicide layer, with different levels of stress relaxation observed on sapphire and oxidized silicon substrates.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Junren Wang, Shuai Fu, Heng Zhang, Robert Graf, Henry Halim, Shuai Chen, Wenhao Zheng, Mischa Bonn, Katharina Landfester, Andreas Riedinger, Hai Wang
Summary: This study reports a novel solution-processed approach to fabricate high-quality, large-area alpha-Ag2S thin films. Ultrafast terahertz conductivity measurements show efficient charge transport in the films. Additionally, introducing poly(vinyl alcohol) enables the synthesis of free-standing alpha-Ag2S thin films for flexible optoelectronics.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ce Huang, Enze Zhang, Yong Zhang, Jinglei Zhang, Faxian Xiu, Haiwen Liu, Xiaoyi Xie, Linfeng Ai, Yunkun Yang, Minhao Zhao, Junjie Qi, Lun Li, Shanshan Liu, Zihan Li, Runze Zhan, Ya-Qing Bie, Xufeng Kou, Shaozhi Deng, X. C. Xie
Summary: The experimental investigation on the influence of quenched disorder on the universality class of quantum phase transitions revealed the thickness-tuned universality class of superconductor-metal transition, showing different quantum criticality behaviors at different thicknesses. The observations of superconducting-metal transitions under in-plane magnetic fields provide valuable information on the disorder effect on quantum criticality.
Review
Physics, Applied
Kazumasa Iida, Jens Hanisch, Satoshi Hata, Akiyasu Yamamoto
Summary: Since the discovery of Fe-based superconductors, efforts have been made to grow single crystals and epitaxial thin films of them for both fundamental studies and applied research. Remarkably, most Fe-based superconductors have been successfully realized in the form of epitaxial thin films. However, due to various challenges, some compounds could only be obtained as single crystals. In recent years, these issues have been solved, and those compounds have been successfully fabricated as epitaxial thin films, allowing for easier evaluation of their application potential through transport critical current measurements.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Xiang Ding, Shengchun Shen, Huaqian Leng, Minghui Xu, Yan Zhao, Junrui Zhao, Xuelei Sui, Xiaoqiang Wu, Haiyan Xiao, Xiaotao Zu, Bing Huang, Huiqian Luo, Pu Yu, Liang Qiao
Summary: The discovery of superconducting states in the nickelate thin film with infinite-layer structure has provided a new path for studying unconventional superconductivity. The study shows that the superconducting state of Nd0.8Sr0.2NiO2 is remarkably stable in ambient conditions, but disappears when immersed in water.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Physics, Multidisciplinary
Yasen Hou, Fabrizio Nichele, Hang Chi, Alessandro Lodesani, Yingying Wu, Markus F. Ritter, Daniel Z. Haxell, Margarita Davydova, Stefan Ilic, Ourania Glezakou-Elbert, Amith Varambally, Sebastian Bergeret, Akashdeep Kamra, Liang Fu, Patrick A. Lee, Jagadeesh S. Moodera
Summary: The macroscopic coherence in superconductors allows for dissipationless supercurrents, which can have significant implications in emerging quantum technologies. By implementing unequal supercurrents in the forward and backward directions, the superconducting diode effect can be achieved, enabling unprecedented functionalities. Through experiments and theoretical modeling, we demonstrate the strong superconducting diode effect in conventional superconducting thin films, as well as its enhancement when interfacing with a ferromagnetic semiconductor.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
V. G. Kogan, R. Prozorov
Summary: In this article, the problem of the normal-superconducting phase boundary for films in a parallel magnetic field is revisited using the microscopic BCS theory, considering pair-breaking and transport scattering at arbitrary temperatures. The study confirms that the magnetic field enhances the critical temperature (Tc), but the presence of transport scattering shifts the phase transition curve to higher fields and temperatures. However, in the dirty limit, the enhancement of Tc disappears. The article also discusses intriguing changes to the phase boundary caused by pair-breaking magnetic ions on the film, such as reentrant superconductivity, which require experimental verification.
Article
Physics, Applied
S. J. Rezinovsky Nieto, J. A. Hofer, M. Sirena, N. Haberkorn
Summary: We compared the superconducting properties of 100 nm thick NbTiN films grown on silicon and flexible polyimide. The superconducting critical temperatures were 13.2 K on polyimide and 13.4 K on silicon, while the upper critical field values were around 29 T on silicon and 23 T on polyimide. The comparison of superconducting transition under mechanical deformation showed that NbTiN thin films on flexible polyimide have a higher superconducting gap and upper critical fields, making them potential materials for superconducting electronics.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Jin Yue, Yilikal Ayino, Tristan K. Truttmann, Maria N. Gastiasoro, Eylon Persky, Alex Khanukov, Dooyong Lee, Laxman R. Thoutam, Beena Kalisky, Rafael M. Fernandes, Vlad S. Pribiag, Bharat Jalan
Summary: Using hybrid MBE, high-quality SrTiO₃ films with low defect density were obtained, and their transport properties were studied. The dominant influence of intraband scattering at the second Lifshitz transition was observed, along with the anomalous temperature dependence of the Hall scattering factor and carrier density due to the antiferrodistortive transition.
Article
Physics, Multidisciplinary
Ying Xiang, Qing Li, Yueying Li, Huan Yang, Yuefeng Nie, Hai-Hu Wen
Summary: The discovery of superconductivity in infinite-layer nickelate superconducting films has sparked interest due to similarities with high-T(c) cuprate superconductors. Experimental data on these films, specifically regarding the upper critical field, remain limited. This study presents temperature- and angle-dependence of resistivity in Nd0.8Sr0.2NiO2 thin films, revealing information on superconductivity anisotropy and paramagnetic effects.
CHINESE PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Yinong Yin, Ashutosh Tiwari
Summary: The thickness of Ca3Co4O9 thin films grown on single-crystal Sapphire (0001) substrate affects the Seebeck coefficient, electrical conductivity, and power factor. The films with 60 nm thickness showed the highest power factor. The overall increase in the Seebeck coefficient with decreasing film thickness was accompanied by a simultaneous decrease in the electrical conductivity, leading to a non-monotonous dependence of the power factor on thickness.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Meital Ozeri, Jiahui Xu, Gilad Bauer, Linde A. B. Olde Olthof, Graham Kimbell, Angela Wittmann, Shira Yochelis, Jonas Fransson, Jason W. A. Robinson, Yossi Paltiel, Oded Millo
Summary: We investigate the phase-coherent transport properties of Cu and Au thin films with adsorbed chiral molecules through low-temperature magneto-conductance measurements. The adsorption of chiral molecules reduces the spin-orbit coupling strength in Cu and induces ferromagnetism in the Au films. Our theoretical model suggests that anisotropy in the molecular tilt angles, acting as magnetic moments, leads to a nonvanishing magnetic exchange interaction, resulting in changes in the spin-orbit coupling strength in Cu and Au. Our work provides a new perspective on the unique phenomena arising from the adsorption of chiral molecules on materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Applied
Phillip M. Wu, Satoshi Ishii, Kenji Tanabe, Ko Munakata, R. H. Hammond, Kazuyasu Tokiwa, T. H. Geballe, M. R. Beasley
APPLIED PHYSICS LETTERS
(2015)
Article
Physics, Multidisciplinary
Chih-Han Wang, Ta-Kun Chen, Chung-Chieh Chang, Chia-Hao Hsu, Yung-Chi Lee, Ming-Jye Wang, Phillip M. Wu, Maw-Kuen Wu
Review
Physics, Applied
M. K. Wu, P. M. Wu, Y. C. Wen, M. J. Wang, P. H. Lin, W. C. Lee, T. K. Chen, C. C. Chang
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2015)
Article
Physics, Applied
Theodore H. Geballe, Robert H. Hammond, Phillip M. Wu
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2015)
Article
Physics, Applied
C. C. Chang, T. K. Chen, W. C. Lee, P. H. Lin, M. J. Wang, Y. C. Wen, P. M. Wu, M. K. Wu
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2015)
Article
Materials Science, Multidisciplinary
Hao Zhang, Phillip M. Wu, A. M. Chang
Article
Physics, Multidisciplinary
Tung-Sheng Lo, Yiping Lin, Phillip M. Wu, Dah-Chin Ling, C. C. Chi, Jeng-Chung Chen
PHYSICAL REVIEW LETTERS
(2016)
Article
Physics, Applied
C. H. Wang, T. K. Chen, C. C. Chang, Y. C. Lee, M. J. Wang, K. C. Huang, P. M. Wu, M. K. Wu
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2018)
Article
Multidisciplinary Sciences
Keng-Yu Yeh, Tung-Sheng Lo, Phillip M. Wu, Kuei-Shu Chang-Liao, Ming-Jye Wang, Maw-Kuen Wu
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Materials Science, Multidisciplinary
T. -W. Lan, K. -H. Su, C. -C. Chang, C. -L. Chen, M. -N. Ou, D. -Z. Wu, P. M. Wu, C. -Y. Su, M. -K. Wu, Y. -Y. Chen
MATERIALS TODAY PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
K. H. Su, P. W. Chi, T. Paul, C. H. Chung, W. M. Chen, Y. S. Su, P. M. Wu, C. Y. Su, M. K. Wu
Summary: "The study shows that lithium ferrite undergoes a phase (morphology) transition and magnetic switching after charge-discharge reaction; DFRTs analysis confirms two types of Li ion migrations; 4 cycles are needed to achieve a capacity similar to 600 mAh/g at 0.1C rate."
MATERIALS TODAY PHYSICS
(2021)
Article
Multidisciplinary Sciences
T. Paul, P. W. Chi, Phillip M. Wu, M. K. Wu
Summary: In this paper, DRT functions are numerically calculated for different systems with impedance data, and the quality of impedance data is checked using Kramers-Kronig relations. The DRTs are calculated using Tikhonov regularization method and the physical significance of peaks are discussed through peak fitting program.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Nahid Kaisar, Tanmoy Paul, Po-Wei Chi, Yu-Hsun Su, Anupriya Singh, Chih-Wei Chu, Maw-Kuen Wu, Phillip M. Wu
Summary: A facile solution process was used to prepare CsPbI3 as an anode material for Li-ion batteries. The material showed promising performance and structural integrity during electrochemical testing, indicating its potential for future LIB applications.
Article
Physics, Multidisciplinary
Keng-Yu Yeh, Yan-Ruei Chen, Tung-Sheng Lo, Phillip M. Wu, Ming-Jye Wang, Kuei-Shu Chang-Liao, Maw-Kuen Wu
FRONTIERS IN PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Prem Chandan, Chung-Chieh Chang, Kuo-Wei Yeh, Chui-Chang Chiu, Dong-Ze Wu, Tzu-Wen Huang, Phillip M. Wu, Po-Wei Chi, Wei-Fan Hsu, Kai-Han Su, Yu-Wen Lee, Hua-Shu Chang, Ming-Jye Wang, Heng-Liang Wu, Horng-Yi Tang, Maw-Kuen Wu
COMMUNICATIONS CHEMISTRY
(2019)