Article
Engineering, Mechanical
Yun Dong, Fangming Lian, Yi Tao, Yusong Ding, Weibin Hui, Zhiyuan Rui
Summary: This paper investigates excitation-dependent energy dissipation during friction between graphene layers in both commensurate and incommensurate states. The results reveal that when the excitation frequency of the tip matches its natural frequency, friction resonance occurs, leading to system breakdown. The origin of this friction resonance is systematically revealed through fast Fourier transform analysis. Additionally, the influence of temperature on frictional energy dissipation differs in commensurate and incommensurate cases due to the net effect of thermal lubrication and thermal collision. Finally, the phononic mechanism of frictional energy dissipation is quantitatively analyzed by calculating the phonon number in different contact states.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
S. -H. Baek, V. A. Sidorov, A. V. Nikolaev, T. Klimczuk, F. Ronning, A. V. Tsvyashchenko
Summary: Investigation on the B20-type cobalt germanide compound CoGe was conducted by measuring specific heat, resistivity, and Co-59 nuclear magnetic resonance (NMR). A phase transition at 13.7 K, along with a crossover scale T-0 and the quadrupole-order-driven commensurate-incommensurate phase transition, were observed in this study. The study suggests that the T-Q transition in CoGe may be driven by a finite electric quadrupole density arising from the low local site symmetry at cobalt sites.
Article
Physics, Multidisciplinary
Yaroslav Kartashov, Fangwei Ye, Vladimir V. Konotop, Lluis Torner
Summary: The photonic moire patterns created by two mutually twisted periodic sublattices in quadratic nonlinear media can allow the formation of parametric solitons, with the geometry of the pattern significantly impacting the conditions for soliton excitation and the properties of soliton families. The geometry also broadens the phase-mismatch bandwidth for soliton generation compared to latticeless structures.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Zilong Wang, Kai Sun, Minlong Tao, Daxiao Yang, Mingxia Shi, Zuo Li, Junzhong Wang
Summary: Using low-temperature scanning tunneling microscopy, the study investigated the commensurate-incommensurate phase transition, rotation epitaxy, and strain relief patterns in C-60 overlayers grown on Cd(0001). The results showed the formation of high-order commensurate phase at low temperature deposition and the transition to incommensurate phase after room temperature annealing.
Article
Multidisciplinary Sciences
Devendra Negi, Deobrat Singh, Rajeev Ahuja, Peter A. van Aken
Summary: The study reveals unprecedented commensurate and incommensurate charge ordered phases in the simple transition-metal mono-oxide CoO at room temperature, with periodic lattice distortions characterized by electron diffraction patterns and transmission electron microscopy. Density functional theory calculations elucidate the mechanism of introducing mixed valence states through cation disordering, leading to the stabilization of Jahn-Teller distortion and localized Co3+ states in CoO. This offers an electronic paradigm for engineering charge ordering and exploiting associated functionalities in transition-metal mono-oxides.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Xiyu Chen, Ning Ding, Meifeng Liu, Tao Zou, V. Ovidiu Garlea, Jingwen Gong, Fei Liu, Yunlong Xie, Lun Yang, Shuhan Zheng, Xiuzhang Wang, Shuai Dong, T. Charlton, Jun-Ming Liu
Summary: Magnetic susceptibility, specific heat, and neutron powder diffraction measurements were performed on polycrystalline Li2Co(WO4)(2) samples. Two successive magnetic transitions were observed under zero magnetic field, with the magnetic ordering temperatures decreasing as the magnetic field increases. Neutron diffraction revealed an incommensurate magnetic state in Li2Co(WO4)(2) with a temperature dependent magnetic propagation vector. Below a certain temperature, the magnetic propagation vector locked into a commensurate value. The antiferromagnetic structure was determined at 1.7 K with a magnetic moment of 2.8(1) mu (B), consistent with first-principles calculations.
Article
Engineering, Mechanical
Yun Dong, Fangming Lian, Weibin Hui, Yusong Ding, Zhiyuan Rui, Yi Tao, Rong Fu
Summary: We investigated the occurrence of multiple friction peaks with increasing velocity in commensurate and incommensurate states between graphene layers. Fast Fourier transform analysis revealed that the frictional spectrum mainly distributed at the washboard frequency of the tip and its harmonics. Resonance occurred in both contact cases when the washboard frequency approached the natural frequency of the tip and its fractional frequencies, resulting in friction peaks. Phonon spectra of the tip and substrate matched in the commensurate state, establishing effective energy dissipation channels, but did not match in the incommensurate state. We also proposed a theoretical model to calculate the number of excited phonons and quantitatively explain the friction discrepancy in different contact states and velocities.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Hai Meng, Zhen Zhan, Shengjun Yuan
Summary: In this paper, an atomistic method is used to investigate the electronic structures of twisted trilayer graphene (TTG) with two independent twist angles. The lattice relaxation, twist angle, and angle disorder effects on the van Hove singularities (VHSs) are discussed, and it is found that lattice relaxation significantly influences the position and magnitude of the VHSs. The moire interference in the supermoire TTG can lead to the formation of various commensurate/incommensurate complex supermoire patterns, and a slight change in twist angles can suppress the peak of the VHSs.
Article
Materials Science, Multidisciplinary
Q-P Ding, N. S. Sangeetha, Abhishek Pandey, D. C. Johnston, Y. Furukawa
Summary: In this study, As-75 nuclear magnetic resonance (NMR) measurements were carried out on CaMn2As2 and SrMn2As2 insulators, revealing their opposite temperature dependences. The analysis of the characteristic shape of the observed spectra determined CaMn2As2 to be a two-dimensional incommensurate state, while SrMn2As2 showed a traditional state.
Article
Mathematics, Interdisciplinary Applications
Omar Alsayyed, Abderrahmane Abbes, Gharib Mousa Gharib, Mayada Abualhomos, Hassan Al-Tarawneh, Maha S. Al Soudi, Nabeela Abu-Alkishik, Abdallah Al-Husban, Adel Ouannas
Summary: This paper introduces a novel memristor map based on fractional Ikeda and investigates its non-linear dynamics under different orders using numerical techniques. The results reveal diverse and complex system behaviors arising from the interaction of fractional orders. The study quantifies complexity and validates chaos using sample entropy test, and proposes non-linear controllers to stabilize and synchronize the model. The research emphasizes the system's sensitivity to fractional order parameters, leading to distinct dynamic patterns and stability regimes.
FRACTAL AND FRACTIONAL
(2023)
Article
Materials Science, Multidisciplinary
Roman Forker, Torsten Fritz
Summary: This article critically examines the assignment method of epitaxy types proposed by Wang et al., and identifies systematic errors in their strain calculations for C60 monolayers.
Article
Physics, Multidisciplinary
Yan-Wei Dai, Ai-Min Chen, Xi-Jing Liu, Yao-Heng Su
Summary: Commensurate and incommensurate Haldane phases for a spin-1 bilinear-biquadratic model are investigated using an infinite matrix product state algorithm. The bipartite entanglement entropy can detect a transition point between the two phases. Nonlocal order parameters and spin correlations are calculated to distinguish between the phases.
Article
Automation & Control Systems
P. Gholamin, A. H. Refahi Sheikhani, A. Ansari
Summary: This article discusses the stability theory of fractional order systems, presents conditions for the asymptotic stability of nonlinear fractional order systems, and designs a control strategy for stabilization of new fractional order chaotic systems. The aim is to stabilize the unstable equilibrium points using a linear state feedback controller and compares it with sliding mode control in both commensurate and incommensurate scenarios, with numerical simulations validating the presented results.
ASIAN JOURNAL OF CONTROL
(2021)
Article
Mathematics, Applied
Iqbal M. Batiha, Omar Talafha, Osama Y. Ababneh, Shameseddin Alshorm, Shaher Momani
Summary: This study aims to provide generic solutions for commensurate and incommensurate cases of fractional-order linear time-invariant (FoLTI) systems using the Adomian decomposition method. Additionally, a general solution for singular FoLTI systems is obtained using the same methodology. Numerical examples are provided to illustrate the core points of perturbations in these singular FoLTI systems, which can generate various corresponding solutions.
Article
Chemistry, Inorganic & Nuclear
Kunlang Ji, Ruichao Chen, Pascal Manuel, J. Paul Attfield
Summary: A new double double perovskite CaMnCoWO6 has been synthesized under high pressure, with a tetragonal structure and an off-stoichiometric composition CaMn0.8Co1.2WO6 due to disorder between A-site Mn2+ and B-site Co2+. Unusual combination of commensurate and incommensurate spin orders has been observed at a magnetic transition temperature T-C=18 K. This discovery presents complex magnetism in the double double perovskite family.
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
(2023)
Article
Materials Science, Multidisciplinary
Magdalena Marganska, Piotr Chudzinski, Milena Grifoni
Article
Materials Science, Multidisciplinary
Daniel R. Schmid, Sergey Smirnov, Magdalena Marganska, Alois Dirnaichner, Peter L. Stiller, Milena Grifoni, Andreas K. Huettel, Christoph Strunk
Article
Multidisciplinary Sciences
Michael Niklas, Sergey Smirnov, Davide Mantelli, Magdalena Marganska, Ngoc-Viet Nguyen, Wolfgang Wernsdorfer, Jean-Pierre Cleuziou, Milena Grifoni
NATURE COMMUNICATIONS
(2016)
Article
Physics, Condensed Matter
Sung Ho Jhang, Magdalena Marganska, Miriam del Valle, Yurii Skourski, Milena Grifoni, Joachim Wosnitza, Christoph Strunk
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2011)
Article
Materials Science, Multidisciplinary
S. H. Jhang, M. Marganska, Y. Skourski, D. Preusche, B. Witkamp, M. Grifoni, H. van der Zant, J. Wosnitza, C. Strunk
Article
Materials Science, Multidisciplinary
Miriam del Valle, Magdalena Marganska, Milena Grifoni
Article
Materials Science, Multidisciplinary
Magdalena Marganska, Miriam del Valle, Sung Ho Jhang, Christoph Strunk, Milena Grifoni
Article
Physics, Multidisciplinary
S. H. Jhang, M. Marganska, Y. Skourski, D. Preusche, M. Grifoni, J. Wosnitza, C. Strunk
PHYSICAL REVIEW LETTERS
(2011)
Article
Physics, Multidisciplinary
M. Marganska, D. R. Schmid, A. Dirnaichner, P. L. Stiller, Ch. Strunk, M. Grifoni, A. K. Huettel
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Condensed Matter
Nico Leumer, Magdalena Marganska, Bhaskaran Muralidharan, Milena Grifoni
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Physics, Multidisciplinary
W. Yang, C. Urgell, S. L. De Bonis, M. Marganska, M. Grifoni, A. Bachtold
PHYSICAL REVIEW LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Aritra Lahiri, Tokuro Hata, Sergey Smirnov, Meydi Ferrier, Tomonori Arakawa, Michael Niklas, Magdalena Marganska, Kensuke Kobayashi, Milena Grifoni
Article
Materials Science, Multidisciplinary
Lars Milz, Wataru Izumida, Milena Grifoni, Magdalena Marganska
Article
Materials Science, Multidisciplinary
Magdalena Marganska, Lars Milz, Wataru Izumida, Christoph Strunk, Milena Grifoni
Article
Materials Science, Multidisciplinary
W. Izumida, L. Milz, M. Marganska, M. Grifoni