Article
Chemistry, Physical
Kaho Nakatani, Masahiro Higashi, Hirofumi Sato
Summary: This paper presents a methodology for analyzing chemical bonds in molecules using spin correlations in the electronic wave function. By introducing spin correlation functions using biorthogonal second quantization, the method can extract local singlet and local triplet elements. The relationship between these spin correlations and traditional chemical concepts is clarified, and the analysis method is numerically verified through chemical reactions.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Applied
Zicun Li, Jinbin Li, Daning Shi
Summary: In this study, the circularly-symmetric phase separation in a spin-1 spin-orbit angular momentum coupled Rb-87 Bose-Einstein condensate (BEC) system was investigated using numerical solutions. The increase of the coupling strength resulted in the formation of annular structures, which exhibited different characteristics compared to the phase separation of a spin and linear momentum coupled BEC. The experimental results supported the findings, and the influence of different parameters on the system was analyzed.
MODERN PHYSICS LETTERS B
(2022)
Article
Optics
Yiwen Han, Shi-Guo Peng, Ke-Ji Chen, Wei Yi
Summary: We study the two-body bound states in a spin-orbital-angular-momentum (SOAM) coupled quantum gas of fermions within a tightly confined ring geometry in two dimensions. We propose a method to detect these molecular states through Raman spectroscopy and explain the significance of studying the underlying pairing mechanism under SOAM coupling.
Article
Physics, Condensed Matter
Shubhajyoti Mohapatra, Avinash Singh
Summary: The study investigates the pseudo-spin rotation symmetry of different Coulomb interaction terms under SU(2) transformation in pseudo-spin space. It was found that the Hund's coupling and pair-hopping interaction terms systematically break the pseudo-spin rotation symmetry, leading to the formation of easy x-y plane anisotropy and magnon gap.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Bjoern Schwarz, Julian Hansen, Anna-Lena Hansen, Eugen Zemlyanushin, Helmut Ehrenberg
Summary: The magnetic properties of tetragonal α-Mn3O4 spinel, its metastable high-pressure modification γ-Mn3O4, and a defect-rich α-Mn3O4 modification were investigated. The unintentional formation of defect-rich α-Mn3O4 phase instead of desired γ-Mn3O4 occurred after high-pressure treatment. The results provide clarification for contradictory reports on the magnetic properties of γ-Mn3O4 in the literature. In addition, in situ low-temperature X-ray diffraction and X-ray absorption spectroscopy experiments did not observe any structural transition coupled with the magnetic transition at 210 K, contradicting previous conclusions based on powder neutron diffraction.
Article
Chemistry, Multidisciplinary
Chao Li, Roberto Robles, Nicolas Lorente, Sanjoy Kr Mahatha, Sebastian Rohlf, Kai Rossnagel, Alessandro Barla, Boris V. Sorokin, Stefano Rusponi, Philippe Ohresser, Sara Realista, Paulo N. Martinho, Torben Jasper-Toennies, Alexander Weismann, Richard Berndt, Manuel Gruber
Summary: The magnetic properties of transition-metal ions are usually described by atomic spins and exchange coupling, with the orbital moment seen as a perturbation. However, our study on a Co-(II) complex with antiferromagnetically coupled 1/2 spins on Au(111) reveals that each Co ion has a comparable orbital moment to the spin, leading to magnetic anisotropy. This finding emphasizes the importance of considering orbital moments, even in systems with strong ligand fields, and has important consequences for quantum operations.
Article
Optics
M. Balamurugan, R. Chakrabarti, B. Virgin Jenisha, V Yogesh
Summary: By utilizing an adiabatic approximation method, a bipartite qudit-oscillator Hamiltonian is studied for low-spin values in both strong and ultrastrong coupling regimes. The study reveals a pattern of quasiperiodic collapses and revivals in the qudit entropy in the strong coupling regime, while a large number of interaction-dependent modes and their harmonics are generated in the ultrastrong coupling domain. Both regimes show antibunching of the photoemission events, particularly for small spin values.
Article
Materials Science, Ceramics
D. A. Vinnik, A. Yu Starikov, V. E. Zhivulin, K. A. Astapovich, V. A. Turchenko, T. Zubar, S. Trukhanov, J. Kohout, T. Kmjec, O. Yakovenko, L. Matzui, A. S. B. Sombra, D. Zhou, R. B. Jotania, C. Singh, A. Trukhanov
Summary: In this study, BaFe12-xTixO19 barium hexaferrites with different titanium concentrations were synthesized, and their magnetic and electrical parameters were investigated. The SEM investigation showed that the samples were ceramics, and crystal structure refinement was realized. The magnetic and electrical properties varied with temperature and doping concentration.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Bao Jin, Guangyan Chen, Jun Zhao, Yongyong He, Yiyao Huang, Jianbin Luo
Summary: The study found that compound grease with trace amounts of Mn3O4#G nanocomposite additives can significantly reduce the friction coefficient, while the microstructure of graphene tends to be ordered under high-temperature friction. Additionally, the synergistic effect of Mn3O4#G filling effect and graphene island effect also significantly improves lubrication properties.
Article
Materials Science, Multidisciplinary
Wei Xiong, Jiaojiao Chen, Baolong Fang, Mingfeng Wang, Liu Ye, J. Q. You
Summary: In this study, a method to greatly enhance the interaction between two single NV spins in diamond is proposed. By optimizing the interaction between NV spin and the electromechanical cavity, a strong coupling between the spins is achieved, enabling coherent quantum-information exchange.
Article
Multidisciplinary Sciences
Lukas M. Veldman, Laetitia Farinacci, Rasa Rejali, Rik Broekhoven, Jeremie Gobeil, David Coffey, Markus Ternes, Alexander F. Otte
Summary: A new method for studying the evolution of spin-coupled systems using scanning tunneling microscopy. By utilizing a direct-current pump-probe scheme and magnetic interaction to adjust the relative precession of spins, the mechanism of spin entanglement leading to angular momentum exchange is revealed.
Article
Chemistry, Physical
Karol Kowalski
Summary: In this Communication, numerical evidence is provided to suggest alternative calculation methods for the standard single-reference coupled-cluster (CC) energies. It is demonstrated that the CC energies can be reconstructed by diagonalizing the effective Hamiltonians that describe correlated sub-systems. In an extreme case, it is shown that the CC energy can be reproduced by diagonalizing the effective Hamiltonian of a sub-system composed of a single electron. These properties of the CC formalism can be utilized to design protocols for defining effective interactions in sub-systems and introduce a new type of self-consistency for approximate CC approaches.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Fateme Izadi, Reza Sepehrinia
Summary: We investigate the competition between ferromagnetic and spin glass phases in a system of coupled infinite-range Ising and Sherrington-Kirkpatrick models. By considering magnetization and Edwards-Anderson order parameters, we obtain the replica-symmetric solution for the free energy of the system and identify different phases as well as the dominant phase for varying coupling strengths. Interestingly, we find that although both subsystems exhibit different order parameters, they are in the same phase. The boundary between ferromagnetic and spin glass phases becomes qualitatively different as the coupling between subsystems changes, leading to a reentrant transition between these phases at intermediate coupling values accompanied by a tricritical point.
Article
Chemistry, Inorganic & Nuclear
Sergey Ovsyannikov, Alena A. Aslandukova, Andrey Aslandukov, Stella Chariton, Alexander A. Tsirlin, Igor Korobeynikov, Natalia Morozova, Timofey Fedotenko, Saiana Khandarkhaeva, Leonid Dubrovinsky
Summary: In this study, single crystals of marokite-type orthorhombic manganese oxide gamma-Mn3O4 were synthesized at high pressures. The semiconductor material exhibited two antiferromagnetic transitions and remained stable under high pressures, unlike similar iron oxides. The research highlighted significant differences in the high-pressure behavior of manganese oxides compared to iron oxides with similar stoichiometries.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
R. Rajesh, N. V. Giridharan, K. Ramesh Kumar, C. Karthika
Summary: This report investigates the room temperature magnetodielectric effect of polycrystalline BiFe0.8Mn0.2O3 ceramics. Mn-doping results in weak ferromagnetic response due to changes in the spiral spin ordering. Bi vacancies cause charge compensating oxidation of Mn3+/Mn4+, leading to weaker ferromagnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Kazuma Funahashi, Yu Kakesu, Tomomasa Kajita, Yoshihito Obata, Yumiko Katayama, Kazunori Ueno, Takehito Suzuki, Joseph George Checkelsky, Takuro Katsufuji
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2019)
Article
Physics, Applied
Hisashi Inoue, Minyong Han, Linda Ye, Takehito Suzuki, Joseph G. Checkelsky
APPLIED PHYSICS LETTERS
(2019)
Article
Multidisciplinary Sciences
Linda Ye, Mun K. Chan, Ross D. McDonald, David Graf, Mingu Kang, Junwei Liu, Takehito Suzuki, Riccardo Comin, Liang Fu, Joseph G. Checkelsky
NATURE COMMUNICATIONS
(2019)
Article
Materials Science, Multidisciplinary
Hisashi Inoue, Minyong Han, Mengli Hu, Takehito Suzuki, Junwei Liu, Joseph G. Checkelsky
PHYSICAL REVIEW MATERIALS
(2019)
Article
Physics, Multidisciplinary
Erica Kotta, Lin Miao, Yishuai Xu, S. Alexander Breitweiser, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Wenhan Zhang, Weida Wu, Takehito Suzuki, Joseph Checkelsky, L. Andrew Wray
Article
Materials Science, Multidisciplinary
Ryusei Takahama, Toi Ishii, Daigo Indo, Mitsutoshi Arizono, Chieko Terakura, Yoshinori Tokura, Nao Takeshita, Masaaki Noda, Hideki Kuwahara, Takuo Saiki, Takuro Katsufuji, Ryoichi Kajimoto, Tetsuji Okuda
PHYSICAL REVIEW MATERIALS
(2020)
Article
Multidisciplinary Sciences
A. Devarakonda, H. Inoue, S. Fang, C. Ozsoy-Keskinbora, T. Suzuki, M. Kriener, L. Fu, E. Kaxiras, D. C. Bell, J. G. Checkelsky
Article
Multidisciplinary Sciences
Minyong Han, Hisashi Inoue, Shiang Fang, Caolan John, Linda Ye, Mun K. Chan, David Graf, Takehito Suzuki, Madhav Prasad Ghimire, Won Joon Cho, Efthimios Kaxiras, Joseph G. Checkelsky
Summary: Transition metal kagome compounds have been identified as a promising material platform to investigate the electronic flat band. The authors report the signature of a two-dimensional flat band at the surface of antiferromagnetic kagome metal FeSn using planar tunneling spectroscopy supported by first-principles calculations. The spectroscopic capability to characterize the electronic structure of a kagome compound at a thin film heterointerface provides a unique opportunity to probe flat band induced phenomena with simultaneous electrical tuning of its properties.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
A. Devarakonda, T. Suzuki, S. Fang, J. Zhu, D. Graf, M. Kriener, L. Fu, E. Kaxiras, J. G. Checkelsky
Summary: This study investigates thermodynamic signatures of bosonic Landau level transitions in a layered superconductor, where Cooper pairs with finite momentum are formed. The observations indicate distinct vortex states and modulations in the upper critical magnetic field, in agreement with predictions for Cooper pair Landau level transitions in a finite-momentum superconductor.
Article
Materials Science, Multidisciplinary
Junbo Zhu, Changmin Lee, Fahad Mahmood, Takehito Suzuki, Shiang Fang, Nuh Gedik, Joseph G. Checkelsky
Summary: In this study, we investigated the transport, thermodynamic, and spectroscopic properties of ZrTe5 to understand its band structure and unique thermoelectric properties. We observed a small electronic band gap and temperature dependent Fermi level in this material. The thermoelectric coefficients of ZrTe5 showed an unusually large and nonmonotonic temperature evolution. Additionally, we found a significant enhancement of the thermoelectric coefficients in a magnetic field. These findings provide a comprehensive understanding of ZrTe5 as a high mobility small Fermi surface system with potential for magnetic field driven thermoelectricity.
Article
Materials Science, Multidisciplinary
Yuhki Kondoh, Ryosuke Takei, Tetsuji Okuda, Kazunori Ueno, Yumiko Katayama, Takuo Saiki, Wataru Sekino, Tomomasa Kajita, Takuro Katsufuji
Summary: This study revealed the one-dimensional anisotropy of Ba3-xSrxNb5O15 single crystals during the metal-insulator transition, which is primarily influenced by the disorder caused by loosely bound Sr ions to the surrounding oxygen ions.
Article
Physics, Multidisciplinary
Tomomasa Kajita, Hideki Kuwahara, Shigeo Mori, Takuro Katsufuji
Summary: In BaV10O15 with quasitriangular V lattices, unique superstructures characterized by (qq0)-type peaks in the momentum space were found, likely caused by the dense arrangement of the V trimers associated with the orbital ordering of V. These results indicate that the superstructure of the V trimers, each of which is also a superstructure, gives rise to ordered phases with peculiar characteristics.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
Takuro Katsufuji, Masayuki Miyake, Makoto Naka, Masahito Mochizuki, Sota Kogo, Tomomasa Kajita, Yasuhiro Shimizu, Masayuki Itoh, Takatoshi Hasegawa, Shunsuke Shimose, Shunta Noguchi, Takuo Saiki, Takuro Sato, Fumitaka Kagawa
Summary: The ferrimagnetic La5Mo4O16 undergoes a phase transition at 60 K due to orbital ordering of Mo 4d states, leading to formation of small ferrimagnetic domains responsible for relaxation behavior and memory effect in magnetization. The nonvolatile positive magnetoresistance observed below 60 K is attributed to disappearance of magnetic domains and electrical conduction along domain walls with applied magnetic field.
PHYSICAL REVIEW RESEARCH
(2021)
Correction
Materials Science, Multidisciplinary
S. Dash, T. Kajita, M. Okawa, T. Saitoh, E. Ikenaga, N. L. Saini, T. Katsufuji, T. Mizokawa
Article
Materials Science, Multidisciplinary
S. Dash, M. Okawa, T. Kajita, T. Yoshino, R. Shimoyama, K. Takahashi, Y. Takahashi, R. Takayanagi, T. Saitoh, A. Yasui, E. Ikenaga, N. L. Saini, T. Katsufuji, T. Mizokawa
