Article
Nanoscience & Nanotechnology
Chao Liu, Yaohua Liu, Bangmin Zhang, Cheng-Jun Sun, Da Lan, Pingfan Chen, Xiaohan Wu, Ping Yang, Xiaojiang Yu, Timothy Charlton, Michael R. Fitzsimmons, Jun Ding, Jingsheng Chen, Gan Moog Chow
Summary: This study uses polarized neutron reflectometry to determine the magnetic depth profiles of PZT/LSMO bilayers with opposite self-polarizations, revealing differences in magnetic couplings and Mn valences between the two polarizations. The results provide insights into the magnetoelectric coupling at the PZT/LSMO interface and the emergent functionalities at complex oxide interfaces.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Xiaohan Wu, Da Lan, Chengjun Sun, Hua Zhou, Xiaojiang Yu, Ping Yang, Xiaoqian Yu, Chao Liu, Pingfan Chen, Jun Ding, Jingsheng Chen, Gan Moog Chow
Summary: This study reports a two-step magnetization reversal in PZT/LSMO superlattices, which is attributed to the combined effects of strain, ferroelectric polarization, and exchange. The results demonstrate enhanced magnetoelectric coupling in PZT/LSMO superlattices, which holds significant implications for the application of multiferroic-based devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Shinichiro Hatta, Ko Obayashi, Hiroshi Okuyama, Tetsuya Aruga
Summary: The study revealed that the vdW interface in Bi2Te3 films can lead to a significant increase in conductivity with increasing thickness due to the confinement of conduction band states at the interface.
SCIENTIFIC REPORTS
(2021)
Review
Biochemistry & Molecular Biology
Maria Benelmekki, Jeong-Hwan Kim
Summary: The term "nanosheets" refers to ultrathin film materials with thickness ranging from a single atomic layer to a few tens of nanometers. They are considered ideal building blocks for various applications due to their physicochemical properties and large surface area. Different manufacturing methods are employed, with polymer template liquid exfoliation (PTLE) methods being the most suitable, as they can produce high-performance and stable hybrid nanosheets.
Article
Nanoscience & Nanotechnology
Syed Q. A. Shah, Muhammet Annaorazov, Gaurab Rimal, Jian Wang, Mario F. Borunda, Jinke Tang, Andrew J. Yost
Summary: Using pulsed laser deposition, a EuO1-x film was deposited on a Si(001) substrate with a MgO buffer, and compared to a heterostructure with an additional BaTi2O5 film on top of the EuO1-x surface. XRD analysis showed that the films had a preferred EuO(111) orientation and the presence of EuSi2, suggesting diffusion of Si or Eu across the MgO buffer layer. The EuO1-x films exhibited a ferromagnetic signature and temperature-dependent exchange bias, while the BaTi2O5 films showed an antiferromagnetic behavior, indicating an origin at the BaTi2O5/EuO1-x interface.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Ruofan Li, Peng Li, Di Yi, Lauren J. Riddiford, Yahong Chai, Yuri Suzuki, Daniel C. Ralph, Tianxiang Nan
Summary: Magnon-mediated spin flow in magnetically ordered insulators enables long-distance spin-based information transport with low dissipation. In this study, anisotropy in magnon spin transport was observed in spinel ferrite, providing an approach for controlling magnonic devices via strain.
Correction
Multidisciplinary Sciences
Iryna Zaytseva, Aleksander Abaloszew, Bruno C. Camargo, Yevgen Syryanyy, Marta Z. Cieplak
Summary: The paper has been updated with an amendment, which can be accessed through a link at the top of the paper.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Condensed Matter
Mingjing Chen, Yan Zhu, Xingkun Ning, Qinggang Meng, Xiaoting Li, Lide Fang
Summary: The tunable metal-insulator transitions (MIT) of ultrathin NdNiO3 (NNO) film grown on the LaAlO3/SrTiO3 two-dimensional electronic gas structures have been investigated through interfacial eg orbital reconstruction. Spectroscopy studies indicate that the polar catastrophe of the two-dimensional electronic gas leads to Ni2+ to Ni3+ charge transfer in NNO, facilitated by band-alignment conditions. The hybridization of Ni 3d and O 2p orbitals directly increases in-plane eg orbital occupancy, providing insight into the physical mechanism and modulation of the MIT.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Ramasis Goswami, Syed B. Qadri
Summary: In this study, we investigated the effect of interfacial strain on the microstructure, interfaces and phase-formation behavior in epitaxially grown Fe films. Our results showed that films with higher thicknesses exhibited an equilibrium alpha-Fe phase, while thinner films transformed the metastable delta-Fe phase to an equilibrium alpha-Fe phase through annealing.
Article
Chemistry, Multidisciplinary
Christian Schuster, Harald Rennhofer, Heinz Amenitsch, Helga C. Lichtenegger, Alois Jungbauer, Rupert Tscheliessing
Summary: The study examines the influence of the interplay between metal and polymer surface free energy and reactivity on the evolution of electric conductivity and morphologies. Results show transitions characteristic for Volmer-Weber growth, with lower percolation thickness observed for more reactive metals. Experiments using scattering data provide insights into cluster and film morphology evolution.
Article
Physics, Multidisciplinary
S. R. Mohanty, A. Kar, S. Paul, K. S. R. Menon
Summary: The initial stages of room temperature growth of Pb overlayers on commercial Si(100) p(2 x 1) surface have been investigated using low-energy electron diffraction and low-energy electron microscopy (LEEM) techniques. A well-ordered reconstructed Si(100) p(10 x 2) surface phase has been observed for 0.5 monolayers of Pb deposition and is found to vanish for higher Pb coverages. We do not observe any island formation in our LEEM studies during the early stages of growth, unlike earlier studies on low-miscut substrates. Our dark-field LEEM experiments suggest the observed high step density with low terrace widths is responsible for this behaviour.
INDIAN JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Tatsuru Yamada, Keisuke Ochiai, Hirofumi Kinoshita, Shunsuke Sakuragi, Motohiro Suzuki, Hitoshi Osawa, Hiroyuki Kageshima, Tetsuya Sato
Summary: Ferromagnetism was observed in an ultrathin Pt(100) film deposited on a SrTiO3(100) substrate. The ferromagnetism periodically changes with the film thickness, and the orbital magnetic moment of pure Pt is smaller than that of the Pt/ferromagnetic multilayer system.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Physics, Multidisciplinary
P. Mazalski, L. Ohnoutek, I Sveklo, L. Beran, Z. Kurant, W. Powroznik, A. Wawro, M. O. Liedke, M. Butterling, A. Wagner, J. Fassbender, J. Hamrle, R. Antos, V Kletecka, M. Veis, A. Maziewski
Summary: The irradiation of X/Co 3 nm/Y (where X, Y = Au, Pt) trilayers with Ga+ ions results in interface broadening and surface etching, affecting the magnetic properties. Different miscibility of atoms at the Co/Pt and Co/Au interfaces leads to varying levels of intermixing and influences magnetic anisotropy. Substitution of Au instead of Pt enhances perpendicular magnetic anisotropy.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Applied
Megha Malasi, Shivam Rathod, Archana Lakhani, Devendra Kumar
Summary: The study demonstrates the transport properties of surface states in thin films of topological insulators under varying disorder conditions, revealing behavior differences in thin films of different thicknesses and shedding light on the understanding of transport mechanisms and device engineering in topological insulators.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Condensed Matter
Milos Bajozovic, Andre L. Fernandes Cauduro, Johannes Seibel, Anais Mairena, Stephane Grass, Jerome Lacour, Andreas K. Schmid, Karl-Heinz Ernst
Summary: The interaction of electrons with chiral matter leads to interesting phenomena, such as chirality-induced spin selectivity. The study investigates the interdependence of reflectivity of spin-polarized low energy electrons and the absolute handedness of chiral molecules. Experiments on homochiral films of helical aromatic hydrocarbons reveal that when the coverage exceeds one monolayer, double-layer nucleation and growth occurs, with the second layer patches having a lower work function than the first layer areas. However, reflectivity spectra of spin-polarized electrons and laterally resolved work function measurements do not confirm differences as reported in earlier studies.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Physics, Applied
R. Vocaturo, C. Tresca, G. Ghiringhelli, G. Profeta
Summary: We present an ab initio study of the ternary hydride PdCuHx and demonstrate that at low hydrogen content it is not a superconductor, while at high hydrogenation it shows strong coupling superconductivity. Our study provides a solid explanation for the unusual increase of superconducting critical temperature in hydrogenated palladium when alloyed with noble metals. We highlight the important role played by H-derived phonon modes and their strong coupling with states at the Fermi level.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Arindom Chatterjee, Zhenyun Lan, Dennis Valbjorn Christensen, Federico Bauitti, Alex Morata, Emigdio Chavez-Angel, Simone Sanna, Ivano E. Castelli, Yunzhong Chen, Albert Tarancon, Nini Pryds
Summary: The study focused on the fabrication of thermoelectric thin films doped with SrTiO3-based oxides, showing a decrease in electrical conductivity, carrier density, and thermoelectric Seebeck coefficient as the film thickness decreases.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Matthew Sadd, Salvatore De Angelis, Sofie Colding-Jorgensen, Didier Blanchard, Rune E. Johnsen, Simone Sanna, Elena Borisova, Aleksandar Matic, Jacob R. Bowen
Summary: This study sheds light on the dissolution and precipitation processes of S8 and Li2S, and their role in the utilization of active material in Li-S batteries. By combining operando X-ray Tomographic Microscopy and optical image analysis, the researchers were able to track the sulfur conversion/dissolution in the cathode, the diffusion of polysulfides in the electrolyte, and the redeposition of Li2S on the cathode in real-time. The results provide insights into the important material conversion processes in Li-S batteries and can contribute to the optimization of battery performance.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sandhya Chandola, Simone Sanna, Conor Hogan, Eugen Speiser, Julian Plaickner, Norbert Esser
Summary: This article investigates the effect of atomic hydrogen and toluene-3,4-dithiol (TDT) adsorption on the quasi-1D structures of the Si(553)-(5 x 2)-Au reconstruction. The results provide insights into the optical responses of the surface and explain the origin of the spectral modifications caused by the adsorbate exposure. The preferential adsorption at step edges induces charge transfer and modifies the electronic structure.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Physics, Multidisciplinary
Leonardo Martinelli, Davide Betto, Kurt Kummer, Riccardo Arpaia, Lucio Braicovich, Daniele Di Castro, Nicholas B. Brookes, Marco Moretti Sala, Giacomo Ghiringhelli
Summary: Resonant inelastic x-ray scattering (RIXS) was used to investigate the magnetic dynamics of infinite-layer cuprate CaCuO2. It was found that the single magnon decays into a broad continuum of excitations, with the spin-flip character dominating. This continuum is proposed to originate from the decay of the magnon into spinon pairs, related to the high ring exchange J(c) of CaCuO2.
Article
Chemistry, Physical
Luyao Wang, Xiaobao Li, Xiangchen Hu, Shuyue Chen, Zhehao Qiu, Yifan Wang, Hui Zhang, Yi Yu, Bo Yang, Yong Yang, Pasquale Orgiani, Carmela Aruta, Nan Yang
Summary: This study investigates the role of grain boundaries in the thermal stability of platinum doped cerium oxide (Pt/CeO2) using in-situ ambient-pressure X-ray photoemission spectroscopy (APXPS). By introducing grain boundaries in Pt/CeO2 thin films, the researchers demonstrate the enhanced stability of Pt2+ ions induced by Ce3+ ions at the grain boundaries. The findings highlight the importance of grain boundaries in the atomic-scale design of thermally stable catalytic active sites.
Correction
Chemistry, Physical
Luyao Wang, Xiaobao Li, Xiangchen Hu, Shuyue Chen, Zhehao Qiu, Yifan Wang, Hui Zhang, Yi Yu, Bo Yang, Yong Yang, Pasquale Orgiani, Carmela Aruta, Nan Yang
Article
Chemistry, Physical
Elena Marzia Sala, Nicola Mazzanti, Francesco M. Chiabrera, Simone Sanna, Mogens B. Mogensen, Peter V. Hendriksen, Zhongtao Ma, Soren B. Simonsen, Christodoulos Chatzichristodoulou
Summary: Ceria (CeO2) shows great potential in reducing CO2 emissions and developing efficient and durable fuel electrodes for SOECs, due to its promising electrocatalytic properties and ability to tolerate impurities.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jonathan Frassineti, Pietro Bonfa, Giuseppe Allodi, Erick Garcia, Rong Cong, Brenden R. Ortiz, Stephen D. Wilson, Roberto De Renzi, Vesna F. Mitrovic, Samuele Sanna
Summary: The recently discovered vanadium-based Kagome metals AV3Sb5 exhibit a unique phase transition into charge-density wave (CDW) order that occurs before unconventional superconductivity and time-reversal symmetry breaking. To understand the role of CDW in establishing these unconventional phases, it is crucial to unveil the symmetries and microscopic nature of the charge-ordered phase. In this study, the exact structure of the charge-density wave ordering temperature (TCDW) below RbV3Sb5 is determined through a comprehensive set of nuclear magnetic resonance (NMR) measurements and density functional theory simulations. The findings provide important guidance for developing a theoretical framework to predict properties of exotic electronic orders within the CDW phase.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Multidisciplinary Sciences
Riccardo Arpaia, Leonardo Martinelli, Marco Moretti Sala, Sergio Caprara, Abhishek Nag, Nicholas B. Brookes, Pietro Camisa, Qizhi Li, Qiang Gao, Xingjiang Zhou, Mirian Garcia-Fernandez, Ke-Jin Zhou, Enrico Schierle, Thilo Bauch, Ying Ying Peng, Carlo Di Castro, Marco Grilli, Floriana Lombardi, Lucio Braicovich, Giacomo Ghiringhelli
Summary: Charge density fluctuations are found to be associated with the quantum critical point of the strange metal phase, strengthening the role of charge order and providing insights into high-temperature superconductivity.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Luyao Wang, Xiaobao Li, Xiangchen Hu, Shuyue Chen, Zhehao Qiu, Yifan Wang, Hui Zhang, Yi Yu, Bo Yang, Yong Yang, Pasquale Orgiani, Carmela Aruta, Nan Yang
Summary: Understanding the role of grain boundaries in the thermal stability of platinum doped cerium oxide (Pt/CeO2) is crucial for designing high-performance catalytic systems. In this study, in-situ ambient-pressure X-ray photoemission spectroscopy (APXPS) was used to investigate the effect of grain boundaries on the stability of Pt/CeO2. The results demonstrate that grain boundaries enhance the stability of Pt2+ ions by providing an ideal coordinated site for anchoring and limiting the formation of oxygen vacancies during the reduction process.
Correction
Chemistry, Physical
Luyao Wang, Xiaobao Li, Xiangchen Hu, Shuyue Chen, Zhehao Qiu, Yifan Wang, Hui Zhang, Yi Yu, Bo Yang, Yong Yang, Pasquale Orgiani, Carmela Aruta, Nan Yang
Article
Physics, Multidisciplinary
S. Chicco, E. Garlatti, G. Allodi, A. Chiesa, M. Atzori, L. Sorace, R. De Renzi, R. Sessoli, S. Carretta
Summary: Recent studies have shown that broadband Nuclear Magnetic Resonance (NMR) is capable of coherently manipulating the state of multi-level molecular qubits, paving the way for quantum-error correction protocols. The [VO(TPP)] complex, in particular, exhibits long coherence times and strong hyperfine interaction.
NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Nimrod Bachar, Kacper Koteras, Jakub Gawraczynski, Waldemar Trzcinski, Jozef Paszula, Riccardo Piombo, Paolo Barone, Zoran Mazej, Giacomo Ghiringhelli, Abhishek Nag, Ke-Jin Zhou, Jose Lorenzana, Dirk van der Marel, Wojciech Grochala
Summary: This study investigates the interband excitations of the charge-transfer insulator silver fluoride (AgF2) and finds a close similarity with undoped La2CuO4, suggesting a similar underlying charge-transfer insulator physics. Furthermore, AgF2 may also benefit from a proximity to a charge density wave phase.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Yingying Peng, Leonardo Martinelli, Qizhi Li, Matteo Rossi, Matteo Mitrano, Riccardo Arpaia, Marco Moretti Sala, Qiang Gao, Xuefei Guo, Gabriella Maria De Luca, Andrew Walters, Abhishek Nag, Andi Barbour, Genda Gu, Jonathan Pelliciari, Nicholas B. Brookes, Peter Abbamonte, Marco Salluzzo, Xingjiang Zhou, Ke-Jin Zhou, Valentina Bisogni, Lucio Braicovich, Steven Johnston, Giacomo Ghiringhelli
Summary: This study investigates the electron-phonon coupling in high-Tc superconducting cuprates using resonant inelastic x-ray scattering. By comparing the results from two cuprate families at different doping levels, it is found that the EPC strength decreases with doping and shows a nonmonotonic trend at smaller momenta, which is attributed to the screening effect of charge carriers.
