Article
Physics, Multidisciplinary
Lei Jin, Yin Shi, Frances I. Allen, Long-Qing Chen, Junqiao Wu
Summary: This study investigates the critical nucleus size of the metal-insulator phase transition (MIT) in strongly correlated VO2 materials, and experimentally validates the applicability of classical nucleation theory in describing this complex case.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Laszlo Posa, Gyorgy Molnar, Benjamin Kalas, Zsofia Baji, Zsolt Czigany, Peter Petrik, Janos Volk
Summary: A simple fabrication method for VO2 rich layers was proposed by oxidizing metallic vanadium in atmospheric air, with a sufficiently broad annealing time window obtained. The presence of VO2 was confirmed by electrical measurements and in situ spectroscopic ellipsometric measurements, showing significantly lower phase transition temperatures.
Article
Materials Science, Multidisciplinary
Johannes Bjerlin, Anders S. Sorensen, Stephan Haas
Summary: In this study, Majorana modes in a quantum spin chain with bond-dependent exchange interactions are investigated by studying its dynamics. The study reveals a set of strong zero modes in the real-time dynamics of local spins and derives perturbative interactions that map the spin chain onto the topological regime. Furthermore, the study showcases the emergence of Majorana modes in a chain of effective dimers and how a second class of Majorana modes can be observed by breaking the local symmetry.
Article
Multidisciplinary Sciences
Aminat Oyiza Suleiman, Sabeur Mansouri, Nicolas Emond, Boris Le Drogoff, Theophile Begin, Joelle Margot, Mohamed Chaker
Summary: Competition between different phases in transition metal oxides has attracted significant interest for both fundamental research and practical applications. In this study, phase transitions in undoped and Cr-doped VO2 thin films were investigated, highlighting the effect of microstructure on the metal-insulator transition. By correlating Raman data with EXAFS analysis, the coupling between structural phase transition and metal-insulator transition in VO2 films was quantitatively studied, emphasizing the critical role of thermal vibrational disorder in the phase transitions.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Bohan Li, Rocio Camacho-Morales, Neuton Li, Andrea Tognazzi, Marco Gandolfi, Domenico de Ceglia, Costantino De Angelis, Andrey A. Sukhorukov, Dragomir N. Neshev
Summary: By optimizing the nanostructured VO2 material, researchers have successfully improved its light transmission modulation to 0.73, which is twice the previous achieved modulation value. This research provides new opportunities for the application of VO2 materials.
PHOTONICS RESEARCH
(2023)
Article
Physics, Applied
Zhi W. Hua, Tan Zheng, Jing X. Sang, Xiao F. Xu, Bin H. Wu, Lian F. Wei
Summary: Vanadium dioxide (VO2) undergoes a phase transition from the monoclinic phase to the rutile phase near 340 K at ambient pressure, with potential device applications. The study calculates the phonon properties of the two phases of VO2 using the TDEP method and constructs a resistance-temperature phase diagram, indicating the stability of the rutile phase. The research provides evidence that anharmonicity in the lattice dynamics of VO2 is significant.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Crystallography
Pawel Polak, Jan Jamroz, Tomasz K. Pietrzak
Summary: In this paper, metal-insulator transitions in vanadium (III) and (IV) oxides were observed using contemporary laboratory equipment. Precise investigation of changes in crystallographic structure as a function of temperature, observation of thermal effects, and quasi-continuous measurement of conductivity revealed considerable hysteresis in the transitions of these materials.
Article
Materials Science, Multidisciplinary
Yuan Li, He Ma, Fawei Tang, Chenyu Li, Bolun Wang, Xiaoyan Song, Kai Liu, Xinping Zhang
Summary: This paper develops a laser direct writing technique on freestanding vanadium dioxide (VO2) film for fabricating microactuators with arbitrary shapes. The precision of laser direct writing is high, and the pulse energy is low, resulting in increased fabricating efficiency and flexibility. This fabrication strategy can also be applied to the fabrication of other smart microdevices.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Dheeraj Ranaut, K. Mukherjee
Summary: A rare-earth orthovanadate PrVO4 was studied, in which the near neighbor Pr atoms form complex spin geometries. The DC magnetic susceptibility shows a broad maximum and its position remains unchanged under the applied magnetic field. The magnetic heat capacity exhibits a broad maximum with almost zero value at low temperatures, indicating the presence of a spin gap and the possibility of low dimensional magnetism. PrVO4 is a potential candidate to study low dimensional magnetism in rare-earth-based systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Physics, Condensed Matter
Namrata Gurung, Chennan Wang, Nicholas S. Bingham, Joel A. T. Verezhak, Kazunari Yamaura, Giuseppe Allodi, Paola Caterina Forino, Samuele Sanna, Hubertus Luetkens, V Scagnoli
Summary: Using muon spin rotation and relaxation (μSR) and Na-23 nuclear magnetic resonance (NMR) spectroscopic methods, we investigated the temperature evolution of magnetic order parameters in the NaOsO3 antiferromagnetic phase, as well as the role of magnetic fluctuations at the Neel temperature. Our results suggest that anomalies in electrical resistivity near 30 K may be attributed to a reduction in Os magnetic moment associated with spin fluctuations, with no significant changes in spin fluctuations frequency or localized Os magnetic moment below 50 K.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Shanguang Zhao, Liang Li, Changlong Hu, Bowen Li, Meiling Liu, Jinglin Zhu, Ting Zhou, Weidong Shi, Chongwen Zou
Summary: In the context of the information explosion society, there is a strong demand for information security in practical applications. This paper proposes an innovative strategy for data encryption and reading during confidential data transmission using VO2 devices. The specific insulator-to-metal transition property of VO2 allows for modulating phase transitions between insulator and metallic states through electric field, temperature, and light radiation. A prototype device fabricated on an epitaxial VO2 film demonstrates excellent stability and unique data encryption function. This study not only presents a multiphysical field-modulated VO2 device for information encryption, but also provides clues for functional devices applications in other correlated oxide materials.
Article
Physics, Multidisciplinary
Hans Kessler, Phatthamon Kongkhambut, Christoph Georges, Ludwig Mathey, Jayson G. Cosme, Andreas Hemmerich
Summary: This study represents the first experimental realization of a time crystal stabilized by dissipation. The period doubled switching between distinct checkerboard density wave patterns in a driven open atom-cavity system is induced by controlled cavity dissipation, cavity-mediated interactions, and external driving. The research demonstrates the robustness of this dynamical phase against changes in system parameters and temporal perturbations of the driving.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Phatthamon Kongkhambut, Jim Skulte, Ludwig Mathey, Jayson G. Cosme, Andreas Hemmerich, Hans Kessler
Summary: In this study, we observed a limit cycle phase in a continuously pumped atom-cavity system, characterized by emergent oscillations in the photon number. This dynamical state spontaneously breaks continuous time translation symmetry and is robust against temporal perturbations, demonstrating the realization of a continuous time crystal.
Article
Chemistry, Physical
Dooyong Lee, Taewon Min, Jiwoong Kim, Sehwan Song, Jisung Lee, Haeyong Kang, Jouhahn Lee, Deok-Yong Cho, Jaekwang Lee, Jae Hyuck Jang, Sungkyun Park
Summary: The study found that octahedral symmetry in VO2 can control its IMT characteristics by changing orbital occupancy, and monoclinic VO2 with high octahedral symmetry exhibits bandwidth-controlled IMT characteristics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Multidisciplinary Sciences
Chris Koerner, Rouven Dreyer, Martin Wagener, Niklas Liebing, Hans G. Bauer, Georg Woltersdorf
Summary: This article discusses the process of frequency multiplication in modern electronics and the potential of devices based on spin waves. It shows that megahertz-range excitation frequencies in a soft magnetic material can cause switching effects on a micrometer scale, leading to phase-locked spin-wave emission in the GHz range. This research highlights the potential of spintronics in various applications.
Article
Physics, Applied
Raktima Basu, Sandip Dhara
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Nanoscience & Nanotechnology
Diptasikha Das, K. Malik, Subarna Das, P. Singha, A. K. Deb, V. A. Kulbachinskii, Raktima Basu, Sandip Dhara, Arup Dasgupta, S. Bandyopadhyay, Aritra Banerjee
Article
Materials Science, Multidisciplinary
Raktima Basu, D. Sornadurai, S. Amirthapandian, Sandip Dhara
BULLETIN OF MATERIALS SCIENCE
(2019)
Article
Chemistry, Physical
Raktima Basu, Avinash Patsha, Sharat Chandra, S. Amirthapandian, Raghavendra Karkala Gururaj, Arup Dasgupta, Sandip Dhara
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Multidisciplinary Sciences
Raktima Basu, Subrata Ghosh, Santanu Bera, A. Das, S. Dhara
SCIENTIFIC REPORTS
(2019)
Article
Materials Science, Multidisciplinary
Raktima Basu, P. R. Reshma, Arun K. Prasad, Sandip Dhara
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Raktima Basu, Geramilla Mangamma, Sandip Dhara
Summary: VO2 is known for its dual-phase transitions, electrical and structural, at a single temperature of 340 K. The structural symmetry of the low-temperature phases of VO2 is different from that of the high-temperature phases. The strain-induced modification of the structural distortion in VO2 is investigated, revealing a ferroelectric-type distortion and the presence of piezoelectric effect in the low-temperature phases. The two low-temperature phases of VO2 can only be distinguished by applying strain, and the strained phase has a piezoelectric coefficient of 11-12 pm/V, showing its potential for piezotronic applications.
Proceedings Paper
Physics, Condensed Matter
Raktima Basu, Sandip Dhara
DAE SOLID STATE PHYSICS SYMPOSIUM 2019
(2020)
Article
Materials Science, Multidisciplinary
Sudipta Mahana, Shishir Kumar Pandey, Bipul Rakshit, Pronoy Nandi, Raktima Basu, Sandip Dhara, S. Turchini, N. Zema, U. Manju, Subhendra D. Mahanti, D. Topwal
Article
Engineering, Chemical
Pradyumna Kumar Parida, Arup Dasgupta, Velaga Srihari, Chanchal Ghosh, Raktima Basu, R. Mythili, Sandip Dhara
ADVANCED POWDER TECHNOLOGY
(2020)
Proceedings Paper
Thermodynamics
Raktima Basu, K. K. Mishra, T. R. Ravindran, Sandip Dhara
9TH NATIONAL CONFERENCE ON THERMOPHYSICAL PROPERTIES (NCTP-2017)
(2018)
Proceedings Paper
Physics, Condensed Matter
Raktima Basu, Manas Sardar, Sandip Dhara
62ND DAE SOLID STATE PHYSICS SYMPOSIUM
(2018)
Article
Physics, Applied
Raktima Basu, P. Magudapathy, Manas Sardar, Ramanathaswamy Pandian, Sandip Dhara
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
Sudipta Mahana, Bipul Rakshit, Raktima Basu, Sandip Dhara, Boby Joseph, U. Manju, Subhendra D. Mahanti, D. Topwal