Article
Chemistry, Physical
Stefano Villa, Domenico Larobina, Antonio Stocco, Christophe Blanc, Massimiliano M. M. Villone, Gaetano D'Avino, Maurizio Nobili
Summary: In this article, the mobilities of prolate ellipsoidal micrometric particles close to an air-water interface were measured using dual wave reflection interference microscopy. The particle's position and orientation with respect to the interface were simultaneously measured as a function of time. The experiment and simulation results showed agreement with slip and no-slip boundary conditions predictions for different types of particle translations and rotations at the air-water interface. The evidences were rationalized within the framework of surface incompressibility at the interface.
Article
Chemistry, Multidisciplinary
Aditya Jayaraman, Kimberly Hsieh, Bhaskar Ghawri, Phanibhusan S. Mahapatra, Kenji Watanabe, Takashi Taniguchi, Arindam Ghosh
Summary: Resolving low-energy features in the density of states (DOS) is crucial for understanding rich novel phenomena in graphene-based 2D heterostructures. Through investigating thermoelectric power, effective probing of fine changes in the DOS of bilayer graphene (BLG) was demonstrated, revealing additional entropy features near the charge neutrality point (CNP) in gapped BLG. This apparent violation of the Mott formula can be quantitatively explained by considering the effects of trigonal warping, possibly serving as evidence for a Lifshitz transition.
Article
Construction & Building Technology
Kamila Gawel, Sigurd Wenner, Narjes Jafariesfad, Malin Torsaeter, Harald Justnes
Summary: This study investigates the effects of electrochemical polarization on cement hydration products in the vicinity of conductive surfaces. The results show that there are differences in hydration products on the anode and cathode surfaces, and different compounds are formed on steel and graphite electrodes. These differences are mainly caused by electrophysical and electrochemical processes, which are important for the engineering design of electrically conductive cement composites.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Multidisciplinary Sciences
Yong Zhong, Zhuoyu Chen, Su-Di Chen, Ke-Jun Xu, Makoto Hashimoto, Yu He, Shin-ichi Uchida, Donghui Lu, Sung-Kwan Mo, Zhi-Xun Shen
Summary: The effect of Lifshitz transition on thermodynamics and superconductivity in hole-doped cuprates has been debated, but this study provides new insights. By using angle-resolved photoemission spectroscopy, the Lifshitz transition in La2-xSrxCuO4 thin films is found to occur around x=0.21. The calculated electronic specific heat agrees with previous measurements and suggests that the specific heat maximum is explained by underlying band structures rather than additional contributions from quantum fluctuations at p*. Additionally, the d-wave superconducting gap remains smooth across the Lifshitz transition, indicating insensitivity of superconductivity to changes in the density of states.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Physical
Pablo M. Piaggi, Thomas E. Gartner III, Roberto Car, Pablo G. Debenedetti
Summary: The possible existence of a liquid-liquid critical point in deeply supercooled water has been debated. Mishima and Stanley studied the melting curves of different ice polymorphs and suggested that the critical point lies between the melting curves of ice III and ice V. However, our molecular dynamics simulations and machine learning model based on ab initio calculations show that the melting curves of ices III, IV, V, VI, and XIII are supercritical and do not intersect the liquid-liquid transition locus. We conclude that the scenario in which the melting curves are supercritical is favored by the most recent computational and experimental evidence.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jaechul Shim, Kyung-Jin Lee
Summary: Highly entangled states are crucial for quantum information processing. In this study, we theoretically investigate magnon-magnon entanglement in a compensated ferrimagnet and find that the steady-state magnon-magnon entanglement is significantly enhanced near the angular momentum compensation point when magnons are coupled with photons in a cavity. This enhancement is attributed to the ability of the ground state of the ferrimagnet to approach the Einstein-Podolsky-Rosen state. This unique feature of ferrimagnets with different Lande g factors between sublattices results in higher magnon entanglement compared to ferromagnets and antiferromagnets.
Article
Physics, Applied
G. V. Dedkov
Summary: This paper presents the calculation results of the Casimir-Lifshitz friction force and heating rate for a small metal particle moving above a metal surface at different local temperatures. It is observed that there is a strong interplay of temperatures, particle velocity, and separation distance, resulting in an anomalous direction of heat flow and a peak temperature dependence of the friction force at low temperatures. The study also discusses the conditions for experimental measurement of these effects.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Xuejia Fan, Yiming Lu, Jian Liu, Xikui Ma, Lei Sun, Yangyang Li, Mingwen Zhao
Summary: We investigated the topological phase transitions of RbAg5Se3 using computational methods. The results showed that the shape of the Dirac and Weyl points in the material can be controlled by strain and the insertion of Pt atoms. These findings contribute to a better understanding of topological phase transitions and related transport phenomena.
NEW JOURNAL OF PHYSICS
(2022)
Article
Environmental Sciences
Philippe Laguionie, Olivier Connan, Thinh Lai Tien, Sophie Vecchiola, Johann Chardeur, Olivier Cazimajou, Luc Solier, Perrine Charvolin-Volta, Liying Chen, Irene Korsakissok, Malo Le Guellec, Lionel Soulhac, Amita Tripathi, Denis Maro
Summary: This study found that Gaussian models such as the Briggs-rural, Briggs-urban, and Doury models tend to underestimate atmospheric transfer coefficients (ATC) and maximum ATC when predicting the dispersion of fluorine 18 near cyclotrons. Helium was found to be an effective tracer for determining ATC downwind of a discharge point in an urban environment.
Article
Materials Science, Multidisciplinary
Tobias Biesner, Weiwu Li, Alexander A. Tsirlin, Seulki Roh, Pai-Chun Wei, Ece Uykur, Martin Dressel
Summary: Pressure-sensitive spectroscopy measurements have revealed promising ways to tune semiconducting materials for energy harvesting and advanced electronic applications. Researchers have characterized SnSe crystals under high pressures to map out the appearance and influence of multivalleys on properties like phase transitions and energy conversion.
NPG ASIA MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Ci-Ci Sun, Wang Li, De-Xuan Liu, Zi-Yi Du, Chun-Ting He, Wei-Xiong Zhang, Xiao-Ming Chen
Summary: Here, we report a weakly bound ionic cocrystal that undergoes a reversible phase transition due to a change in molecular dynamics. Interestingly, the cation in the high-temperature phase exhibits a unique rolling and moving mechanism with different kinetic energy barriers.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Dong-Yun Chen, Dashuai Ma, Junxi Duan, Dong Chen, Haiwen Liu, Junfeng Han, Yugui Yao
Summary: This paper investigates the electrical transport properties of Bi4Br4 and finds two-dimensional quantum oscillations in low-concentration samples and additional valleys in high-concentration samples. In addition, Hall measurements reveal an anomalous decrease of electron concentration with increasing temperature, which can be explained by temperature-induced Lifshitz transition in Bi4Br4.
Article
Physics, Multidisciplinary
Peter E. Siegfried, Hari Bhandari, David C. Jones, Madhav P. Ghimire, Rebecca L. Dally, Lekh Poudel, Markus Bleuel, Jeffrey W. Lynn, Igor I. Mazin, Nirmal J. Ghimire
Summary: The Fermi surface is essential for understanding the properties of metals. In this study, the authors investigate magnetotransport in the kagome magnet YMn6Sn6 and observe two manifestations: an enhancement of magnetoresistance driven by changes in the magnetic structure, and a reduction in resistivity driven by a magnetization-driven Lifshitz transition. These phenomena provide insights into the interplay of magnetism and electronic topology.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Jing Xu, Yu Wang, Samuel E. Pate, Yanglin Zhu, Zhiqiang Mao, Xufeng Zhang, Xiuquan Zhou, Ulrich Welp, Wai-Kwong Kwok, Duck Young Chung, Mercouri G. Kanatzidis, Zhi-Li Xiao
Summary: Recently, anomalies in the temperature dependences of the carrier density and/or mobility derived from analysis of magnetoresistivities have been used to uncover temperature-induced Lifshitz transitions in various materials. In the case of ZrSiSe, two temperature-driven Lifshitz transitions were initially inferred based on two-band model analysis, but a re-examination reveals that the anomalies in the second band may be unreliable, casting doubt on the existence of such phase transitions in ZrSiSe. This paper highlights potential issues in interpreting anomalies in the temperature dependence of the carrier density and mobility using the conventional two-band model.
Article
Chemistry, Multidisciplinary
Kyungrok Kang, Won June Kim, Dohyun Kim, Sera Kim, Byungdo Ji, Dong Hoon Keum, Suyeon Cho, Young-Min Kim, Sebastien Lebegue, Heejun Yang
Summary: This study presents a physical model to explain the non-Fermi liquid behavior in topological semimetals, successfully quantifying the mechanism of Lifshitz transition. Experimental and computational evidence demonstrate that temperature-induced chemical potential shift in highly doped Nb2Se3 induces non-Fermi liquid behavior.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
O. Laguta, A. Sojka, A. Marko, P. Neugebauer
Summary: The development of pulse electron spin resonance (ESR) spectroscopy at microwave frequencies above 100 GHz is challenging, but rapid scan ESR is an alternative technique that provides spin relaxation time information. The method utilizes fast sweeps of the excitation microwave frequency, and the relaxation time can be extracted through fitting the spectrum.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Mathias Schubert, Sean Knight, Steffen Richter, Philipp Kuehne, Vallery Stanishev, Alexander Ruder, Megan Stokey, Rafal Korlacki, Klaus Irmscher, Petr Neugebauer, Vanya Darakchieva
Summary: We report on terahertz electron paramagnetic resonance generalized spectroscopic ellipsometry (THz-EPR-GSE) and its application in studying spin transitions in 4H-SiC. The technique eliminates the need for a cavity, allows independent scanning of field and frequency parameters, and does not require modulation. By using THz-EPR-GSE measurements, we can fully determine the polarization properties of spin transitions and obtain the g and hyperfine splitting parameters of coordinated nitrogen. The results show fundamental differences in measurements at positive and negative fields, providing additional information.
APPLIED PHYSICS LETTERS
(2022)
Review
Materials Science, Multidisciplinary
Vivek Chaudhary, P. Neugebauer, O. Mounkachi, S. Lahbabi, A. El Fatimy
Summary: Phosphorene, as a 2D material, has unique electronic and optical properties, making it promising for high-speed electronics, optoelectronics, and biomedical applications. This review summarizes its chemical and physical properties, discusses recent progress in synthesis, surveys its application in devices, and outlines the remaining challenges and potential applications of phosphorene.
Review
Physics, Applied
Mohammed El Hammoumi, Vivek Chaudhary, P. Neugebauer, A. El Fatimy
Summary: The rapidly growing demand for high-performance and low-power electronic and photonic devices has led to increased attention towards novel two-dimensional layered materials, such as graphene, MoS2, and phosphorene. These materials have the potential to replace the existing semiconductor industry due to their excellent electrical conductivity, strong light-matter interaction, and ability to scale down devices to the atomic level. Chemical vapor deposition (CVD) has been proven to be a promising method for large-scale synthesis of high-quality and uniform 2D crystals. This article discusses the potential of using CVD to improve the growth of graphene, MoS2, and phosphorene.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Lubomir Havlicek, Radovan Herchel, Ivan Nemec, Petr Neugebauer
Summary: This study presents the structural and magnetic studies of complex [Cu(dpt)(NCS)2]. Magnetometry measurements reveal a weak antiferromagnetic interaction mediated by a CuMIDLINE HORIZONTAL ELLIPSIS 7C non-covalent interaction. The exchange magnitude (J = -2.24 cm-1) is determined and supported by theoretical calculations (DFT) and QT-AIM analysis.
Article
Physics, Multidisciplinary
Francesco M. D. Pellegrino, Giuseppe Falci, Elisabetta Paladino
Summary: This study investigates the effect of non-magnetic impurities in graphene Josephson junctions on the supercurrent. The authors find that impurities reduce the critical current and modify the current-phase relation. This research highlights the importance of controlling the electronic properties of graphene Josephson junctions in the presence of disorder.
COMMUNICATIONS PHYSICS
(2022)
Article
Crystallography
I. Zdeg, A. Al-Shami, G. Tiouichi, H. Absike, V. Chaudhary, P. Neugebauer, K. Nouneh, A. Belhboub, O. Mounkachi, A. El Fatimy
Summary: This work investigates the transport properties of layered black phosphorus grown by the chemical vapor transport method. The CVT-grown BP exhibits p-type conduction and high Hall mobility. This study reveals that CVT synthesis is a simple, nontoxic, and cheap technique to make high-quality BP crystals.
CRYSTAL RESEARCH AND TECHNOLOGY
(2023)
Article
Optics
S. Gebert, C. Consejo, S. S. Krishtopenko, S. Ruffenach, M. Szola, J. Torres, C. Bray, B. Jouault, M. Orlita, X. Baudry, P. Ballet, S. V. Morozov, V. I. Gavrilenko, N. N. Mikhailov, S. A. Dvoretskii, F. Teppe
Summary: Since the emergence of graphene, proposals for tunable Landau lasers in the terahertz frequency range have been made. Despite the non-equidistance of the Landau levels, a non-radiative process still persists in Landau-quantized graphene. This work demonstrates Landau emission from Dirac fermions in HgTe quantum wells, which can be tuned by both magnetic field and carrier concentration.
Article
Materials Science, Multidisciplinary
Katarzyna Olkowska Pucko, Elena Blundo, Natalia Zawadzka, Salvatore Cianci, Diana Vaclavkova, Piotr Kapuscinski, Dipankar Jana, Giorgio Pettinari, Marco Felici, Karol Nogajewski, Miroslav Bartos, Kenji Watanabe, Takashi Taniguchi, Clement Faugeras, Marek Potemski, Adam Babinski, Antonio Polimeni, Maciej R. Molas
Summary: By studying the optical properties of WSSe monolayers, the existence of negatively charged excitons and single photon emitters in this material is discovered, providing opportunities for future quantum applications of S-TMDs.
Review
Chemistry, Inorganic & Nuclear
Rafael Calvo, Rosana P. Sartoris, Otaciro R. Nascimento, Matus Sedivy, Antonin Sojka, Petr Neugebauer, Vinicius T. Santana
Summary: In this work, recent advances in the interpretation of EPR spectral changes in dimeric spin arrays with weak inter-dimeric couplings are collected. Experimental results are explained by proposing a spin model with a microscopic flip-flop mechanism involving the absorption and emission of two simultaneous spin-one excitations. The model considers the role of energy conservation in the process and allows for analysis and simulation of the EPR spectra features.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ruth Weller, Mihail Atanasov, Serhiy Demeshko, Ting-Yi Chen, Ivan Mohelsky, Eckhard Bill, Milan Orlita, Franc Meyer, Frank Neese, C. Gunnar Werncke
Summary: The magnetic properties of linear iron(I) silylamides K{crypt}[FeL2] and [KFeL2] were investigated. Slow-relaxation of magnetization, magnetic hysteresis, and magnetic blocking were observed in K{crypt}[FeL2]. In [KFeL2], with increased axial anisotropy, higher relaxation barrier and blocking temperature were observed, in agreement with field-dependent IR-spectroscopy, magnetic measurements, and theoretical analysis.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Amit Pawbake, Thomas Pelini, Ivan Mohelsky, Dipankar Jana, Ivan Breslavetz, Chang-Woo Cho, Milan Orlita, Marek Potemski, Marie-Aude Measson, Nathan P. Wilson, Kseniia Mosina, Aljoscha Soll, Zdenek Sofer, Benjamin A. Piot, Mike E. Zhitomirsky, Clement Faugeras
Summary: This study investigates the magnetization process of a biaxial antiferromagnet under an external magnetic field and finds that applying hydrostatic pressure can induce a metamagnetic transition, leading to a new magnetic phase.
Article
Materials Science, Multidisciplinary
I. Mohelsky, J. Wyzula, B. A. Piot, G. D. Gu, Q. Li, A. Akrap, M. Orlita
Summary: Using Landau-level spectroscopy, the temperature dependence of the energy band gap in zirconium pentatelluride (ZrTe5) is determined. It is found that the band gap reaches E-g = (5 & PLUSMN; 1) meV at low temperatures and increases monotonically with the temperature. This implies that ZrTe5 is a weak topological insulator with noninverted ordering of electronic bands in the center of the Brillouin zone. Magnetotransport experiments show that the resistivity anomaly in ZrTe5 is not connected with the temperature dependence of the band gap.
Article
Materials Science, Multidisciplinary
F. Bonasera, S. -B. Zhang, L. Privitera, F. M. D. Pellegrino
Summary: In this study, we investigate the interface states between two regions of a nodal line semimetal under the illumination of light with opposite circular polarizations. We find that the polarized light can significantly modify the energy structure, possibly generating Van Hove singularities. Furthermore, with the addition of delta doping of magnetic impurities, a switchable and topologically nontrivial, vortexlike pseudospin pattern of the interface states is observed.
