Article
Astronomy & Astrophysics
Abdujappar Rusul, Xiao-Ping Zheng
Summary: The braking index is crucial for understanding pulsar rotation. The sudden spin-down rate transition and varying braking indices of PSR B0540-69 challenge our understanding of the relationship between pulsar spin-down and magnetospheric emission. This study suggests that the increase in the open field line region of the pulsar magnetosphere explains the state transition and the low braking index of PSR B0540-69, while changes in moment of inertia account for the variable braking indices. The results highlight the importance of magnetosphere size and external torque in interpreting pulsar dynamics.
ASTROPHYSICAL JOURNAL
(2023)
Article
Materials Science, Ceramics
Shun Wang, Qiuling Chen
Summary: Nanocrystals doped transparent glasses or glass ceramics have shown promising tunable magnetic and magnetooptical performance. In this study, the Al2O3-induced in-situ crystallization of Gd3Al2Ga3O12 in tellurite glass was reported. The in-situ crystallization influenced the glass network structure, and resulted in the enhancement of Faraday rotation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Xiaoxiong Ren, Junsheng Huang, Ping Li, Yun Zhang, Zhi-Xin Guo
Summary: The recent discovery of 2D magnetic materials has opened new avenues for research on low-dimensional magnetism and potential applications in spintronics. A strategy of depositing TM atoms on graphyne to obtain monolayer TM magnets has been proposed, with various physical properties and potential applications in magnetic tunnel junction devices. These results provide a new framework for obtaining 2D magnets with outstanding spintronic properties.
ADVANCED THEORY AND SIMULATIONS
(2022)
Article
Instruments & Instrumentation
Matthew Terkel, Juan de Vicente
Summary: This study investigates the effects of triaxial unsteady fields on magnetorheological (MR) fluids, revealing that such fields can generate various exotic mesostructures and influence the rheological response of the fluids. By bridging the understanding of rheological response to unique particle structures through experimental tests and observation, the study demonstrates the impact of steady and unsteady fields on the performance of MR fluids.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Seung Gyo Jeong, Jihyun Kim, Taewon Min, Sehwan Song, Jin Young Oh, Woo-suk Noh, Sungkyun Park, Tuson Park, Jong Mok Ok, Jaekwang Lee, Woo Seok Choi
Summary: The modulation of magnetic anisotropy near a digitized dimensional Mott boundary in artificial superlattices composed of SrRuO3 and SrTiO3 is demonstrated. The interlayer coupling strength between the magnetic monolayers is initially engineered, leading to a nearly degenerate state where the anisotropic magnetotransport is strongly influenced by thermal and magnetic energy scales. These findings provide a new approach for digitally controlling magnetic anisotropy in low-dimensional Mott systems, inspiring integration of Mottronics and spintronics.
Article
Chemistry, Physical
Ramany Revathy, Nandakumar Kalarikkal, Manoj Raama Varma, Kuzhichalil Peethambharan Surendran
Summary: In this study, magnetoelectric composites of Fe3O4 and BaTiO3 were synthesized with 0-3 and 1-3 connectivity, showing the presence of exchange bias and an increasing trend of magnetoelectric coupling coefficients with higher BaTiO3 content in the investigated samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Xinhai Zhang, Qiuling Chen, Shouhua Zhang
Summary: The co-doping of Pr and Yb in orthorhombic Pr:YbF3 nano-crystals resulted in changes in morphology, structure and properties, with good transparency and enhanced magnetization and Faraday rotation due to energy transfer and electron transitions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Z. Y. Li, X. Y. Li, J. M. He, Michael M. McGuire, Adam A. Aczel, J. A. Alonso, M. T. Fernandez-Diaz, J-S Zhou
Summary: The Hund's coupling rule is fundamentally important in atomic physics and plays a crucial role in determining the physical properties of strongly correlated electron systems. By conducting various measurements on the rarely studied 4d perovskite oxide LaRuO3, including transport, magnetization, specific heat, thermoelectric power, thermal conductivity, and neutron and x-ray diffraction, our results confirm the theoretical predictions, establishing LaRuO3 as an exemplary Hund metal.
Article
Materials Science, Multidisciplinary
Sushree S. Dash, Miguel Levy
Summary: We used density functional theory to study surface reconstruction effects in yttrium iron garnets. This study aims to explain the physical basis of recent experimental results showing an enhancement in Faraday rotation in iron garnets. Our results show that the bandgap near the surface is significantly reduced and spin-orbit coupling effects become more important. The decrease in band gap leads to an enhancement and change in direction in the Faraday rotation in the visible range all the way to the deep red.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Physics, Nuclear
Saket Suman, S. K. Tandel, S. G. Wahid, T. Manu, M. Hemalatha, B. Maheshwari, A. K. Jain, P. Chowdhury, R. V. F. Janssens, F. G. Kondev, M. P. Carpenter, T. Lauritsen, D. Seweryniak
Summary: The negative-parity band structure built on the proton h(9/2) state in Tl-199 has been established, with rotation alignments observed at frequencies of 0.22 and 0.30 MeV, which are attributed to the breaking of pairs of neutrons in the i(13/2) subshell.
Article
Physics, Multidisciplinary
Vladimir V. Soshenko, Stepan Bolshedvorskii, Olga Rubinas, Vadim N. Sorokin, Andrey N. Smolyaninov, Vadim V. Vorobyov, Alexey Akimov
Summary: The experiment demonstrates rotation measurements using nuclear spins of nitrogen vacancy centers as a sensing element in a rotating setup without the need for a stationary reference. The results are validated by a commercially available microelectromechanical system gyroscope, showing the potential for drift-free rotation sensors based on spins of fundamental particles.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Ather Mahmood, Will Echtenkamp, Mike Street, Jun-Lei Wang, Shi Cao, Takashi Komesu, Peter A. Dowben, Pratyush Buragohain, Haidong Lu, Alexei Gruverman, Arun Parthasarathy, Shaloo Rakheja, Christian Binek
Summary: The research demonstrates the voltage control and nonvolatile Neel vector rotation of antiferromagnetic states without an applied magnetic field at high temperatures. The multifunctional material B:Cr2O3 shows potential for energy efficient nonvolatile CMOS compatible memory applications.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Mohammad Goli, Shant Shahbazian
Summary: The proton in malonaldehyde molecule experiences an effective double-well potential, with its wavefunction delocalized between two wells. Using a state-of-the-art quantum theory of atoms in molecules partitioning scheme, the molecular structure and bonding network of malonaldehyde are obtained from the superposed ab initio wavefunctions. Instead of the familiar clamped-proton portrayal, the superposed states exhibit two novel hybrid oxygen-hydrogen basins with an even distribution of the proton population. The interaction between these hybrid basins is stabilizing, thanks to the classical Coulomb interaction between the one-proton density and one-electron density.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Qiuling Chen, Weihao Chen, Zhuangzhuang Li, Baoji Miao
Summary: In this study, diamagnetic TbVO4 nanocrystals doped with Y3+ ions were synthesized and characterized, with a focus on the influence of mixed valence effect in TbVO4:Y on the structure and properties of diamagnetic glasses/ceramic. The doping of Y3+ into TbVO4 resulted in changes in grain size, crystal structure, and optical properties. The incorporation of Y3+ ions affected the absorption and emission peaks of the TbVO4 nanocrystals, as well as their magnetization and nonlinearity properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Astronomy & Astrophysics
Kento Masuda
Summary: Through investigating the relationship between rotation periods and photometric modulation amplitudes of main-sequence stars, it was found that using the convective turnover time or Rossby number as a scaling factor for rotation period can predict photometric modulation amplitudes effectively. Additionally, a rapid decrease in photometric modulation amplitudes with increasing Rossby number was observed, causing rotational modulation of some stars to be buried under photometric noise.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
X. H. Wu, P. W. Zhao, S. Q. Zhang, J. Meng
Summary: Nuclear chronometers predict the ages of the oldest stars by comparing the abundance of radioactive nuclides. Synchronizing different chronometers can provide constraints on astrophysical conditions. This study found a significant reduction in the uncertainties of nuclear cosmochronology and applied it to estimate the ages of metal-poor stars.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Y. P. Wang, J. Meng
Summary: This study focuses on the microscopic understanding of the influence of pairing correlations or superfluidity on nuclear chiral rotation. By implementing a shell-model-like approach with exact particle number conservation based on the three-dimensional cranking covariant density functional theory, the pairing correlations are taken into account and applied to the chiral doublet bands in 135Nd. The results successfully reproduce the available data, including the I -omega relation and electromagnetic transition probabilities B(M1) and B(E2). It is found that superfluidity can reduce the critical frequency and facilitate chiral rotation by reducing particle/hole alignments along specific axes.
Article
Physics, Nuclear
Xiao-Kai Du, Peng Guo, Xin-Hui Wu, Shuang-Quan Zhang
Summary: The kernel ridge regression (KRR) method and its extension with odd-even effects (KRRoe) are used to learn the nuclear mass table obtained by the relativistic continuum Hartree-Bogoliubov theory. The KRR method achieves a root-mean-square deviation of 0.96 MeV for the binding energies of 9035 nuclei, while the KRRoe method remarkably reduces the deviation to 0.17 MeV. The ability of the machine learning tool to grasp the known physics is discussed through investigating various aspects of the learned binding energies.
Article
Physics, Nuclear
P. Guo, C. Pan, Y. C. Zhao, X. K. Du, S. Q. Zhang
Summary: Using the state-of-the-art deformed relativistic Hartree-Bogoliubov theory, this study provides a self-consistent and microscopic analysis on the dominance of prolate-shape in Te, Xe, and Ba isotopes with neutron number 82 N 126. The results show that most isotopes exhibit prolate shapes in the ground state, while oblate shapes mainly appear after the major shell is half filled. The dominance of prolate-shape enhances with increasing proton number, and is in agreement with the microscopic canonical single-particle energies obtained in the theory.
Article
Physics, Nuclear
J. Lin, Y. K. Wang, C. Xu, Z. H. Li, H. Hua, S. Q. Zhang, D. W. Luo, H. Y. Wu, J. Meng, X. G. Wu, Y. Zheng, C. B. Li, T. X. Li, Z. Y. Huang, H. Cheng, C. Y. Guo, Z. X. Zhou, Z. Q. Chen, C. G. Wang
Summary: The high-spin spectroscopy of Ni-61 has been investigated through the fusion-evaporation reaction Cr-54(B-11, 4n)Ni-61 at a beam energy of 54 MeV. One dipole band and one quadrupole band in Ni-61 have been identified for the first time, and they are considered as potential candidates for magnetic and antimagnetic rotational bands based on comparisons with Cd-110 and particle-plus-rotor model calculations. Microscopic tilted axis cranking covariant density functional theory has been used to further study these new bands, and good agreement between experiment and calculation has been achieved. The dipole band is characterized by the shears mechanism, while the quadrupole band is characterized by the two-shears-like mechanism. This study provides evidence for the possible coexistence of magnetic and antimagnetic rotations in the A approximate to 60 mass region.
Article
Physics, Nuclear
B. Li, D. Vretenar, Z. X. Ren, T. Niksic, J. Zhao, P. W. Zhao, J. Meng
Summary: The saddle-to-scission dynamics of induced fission process is investigated using a microscopic finite temperature model based on time-dependent nuclear density functional theory (TDDFT), which allows the tracking of local temperature evolution along the fission trajectories. By starting from a temperature corresponding to the experimental excitation energy of the compound system, nucleons are propagated along isentropic paths towards scission. The study focuses on the energy partitioning at scission, including dissipated energy along the fission path and the prescission kinetic energy, for four illustrative cases of induced fission. The model is also applied to the dynamics of neck formation and rupture, characterized by the formation of few-nucleon clusters in the low-density region between the nascent fragments.
Article
Physics, Nuclear
Sibo Wang, Hui Tong, Qiang Zhao, Chencan Wang, Peter Ring, Jie Meng
Summary: The study investigates nucleon effective masses in neutron-rich matter using the relativistic Brueckner-Hartree-Fock (RBHF) theory in the full Dirac space. The effective masses of neutrons and protons in symmetric nuclear matter are consistent with empirical values. In neutron-rich matter, the neutron has a larger effective mass compared to the proton, and the predicted neutron-proton effective mass splittings at the empirical saturation density are related to the isospin asymmetry parameter. The study's results align with other ab initio calculations and constraints from nuclear reaction and structure measurements.
Article
Physics, Nuclear
Cong Pan, Myung-Ki Cheoun, Yong-Beom Choi, Jianmin Dong, Xiaokai Du, Xiao-Hua Fan, Wei Gao, Lisheng Geng, Eunja Ha, Xiao-Tao He, Jinke Huang, Kun Huang, Seonghyun Kim, Youngman Kim, Chang-Hwan Lee, Jenny Lee, Zhipan Li, Zhi-Rui Liu, Yiming Ma, Jie Meng, Myeong-Hwan Mun, Zhongming Niu, Panagiota Papakonstantinou, Xinle Shang, Caiwan Shen, Guofang Shen, Wei Sun, Xiang-Xiang Sun, Jiawei Wu, Xinhui Wu, Xuewei Xia, Yijun Yan, To Chung Yiu, Kaiyuan Zhang, Shuangquan Zhang, Wei Zhang, Xiaoyan Zhang, Qiang Zhao, Ruyou Zheng, Shan-Gui Zhou
Summary: This paper extends the point-coupling DRHBc theory to odd -A and odd-odd nuclei and examines its applicability by calculating the ground-state properties of odd -A Nd isotopes. The results show good agreement with experimental data, paving the way for constructing a DRHBc mass table that includes all even-even, odd -A, and odd-odd nuclei in the nuclear chart.
Article
Physics, Nuclear
E. Grodner, M. Kowalczyk, M. Kisielinski, J. Srebrny, L. Prochniak, Ch Droste, S. G. Rohozinski, Q. B. Chen, M. Ionescu-Bujor, C. A. Ur, F. Recchia, J. Meng, S. Q. Zhang, P. W. Zhao, G. Georgiev, R. Lozeva, E. Fiori, S. Aydin, A. Nalecz-Jawecki
Summary: The g factor of the isomeric I = 9(+) bandhead of Cs-128 was obtained through experimental measurements and compared with the particle-rotor model. The results suggest that Cs-128 exhibits a nonchiral geometry for the isomeric bandhead and has a chiral critical frequency.
Article
Physics, Nuclear
C. G. Wang, R. Han, C. Xu, H. Hua, R. A. Bark, S. Q. Zhang, S. Y. Wang, T. M. Shneidman, S. G. Zhou, J. Meng, S. M. Wyngaardt, A. C. Dai, F. R. Xu, X. Q. Li, Z. H. Li, Y. L. Ye, D. X. Jiang, C. G. Li, C. Y. Niu, Z. Q. Chen, H. Y. Wu, D. W. Luo, S. Wang, D. P. Sun, C. Liu, Z. Q. Li, N. B. Zhang, R. J. Guo, P. Jones, E. A. Lawrie, J. J. Lawrie, J. F. Sharpey-Schafer, M. Wiedeking, S. N. T. Majola, T. D. Bucher, T. Dinoko, B. Maqabuka, L. Makhathini, L. Mdletshe, O. Shirinda, K. Sowazi
Summary: The spectroscopy of Ge-71 was investigated and the first experimental evidence of an octupole rotational band in Ge isotopes was found, suggesting enhanced octupole correlation around N = 40 in the A approximate to 70 region.
Article
Physics, Multidisciplinary
J. Z. Han, C. Pan, K. Y. Zhang, X. F. Yang, S. Q. Zhang, J. C. Berengut, S. Goriely, H. Wang, Y. M. Yu, J. Meng, J. W. Zhang, L. J. Wang
Summary: This study successfully extracts accurate nuclear charge radii values through precise measurement and analysis of isotope shifts, which is of great significance for the development of nuclear physics models.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Nuclear
Y. Y. Wang, Q. B. Chen, S. Q. Zhang
Summary: The positive and negative parity bands in Br-73 have been investigated, showing enhanced interband E1 transitions mainly contributed by intrinsic single-particle electric dipole matrix elements.
Article
Physics, Nuclear
D. W. Luo, C. Xu, Y. K. Wang, Z. H. Li, R. A. Bark, S. Q. Zhang, H. Huo, S. Y. Eang, J. Peng, X. Q. Li, H. Y. Wu, X. Wang, C. G. Wu, Q. T. Li, J. Lin, Y. Jin, W. Z. Xu, L. Mu, J. Meng, F. R. Xu, Y. L. Ye, D. X. Jiang, P. Jones, E. A. Lawrie, P. Papka, M. F. Nkalanga, T. D. Bucher, M. V. Chisapi, L. Msebi, S. Jongile, S. Ntshangase, B. R. Zikhali, S. H. Mthembu, T. Seakamela, M. A. Sithole, O. Shirihda, A. A. Aava, L. Mdletshe, K. L. Malatji, S. Mhlongo, L. Makhathini
Summary: The spectroscopy of 62Cu is investigated in this study, which includes the observation of positive-parity and negative-parity level sequences and the discussion of collective structures.
Article
Physics, Nuclear
X. Y. Qu, H. Tong, S. Q. Zhang
Summary: The canonical states in the relativistic continuum Hartree-Bogoliubov theory were obtained by diagonalizing the density matrix using Green's function method on a spatial mesh. The study compared the obtained canonical single-particle energies and wave functions with box-discretized method for the giant halo nucleus 128Zr, and investigated the occupation number vi2 in the canonical basis and the neutrons in continuum Nc. The results showed that the calculations with Green's function and box-discretized methods were consistent in describing nuclear global properties and the neutrons in continuum, while Nc of giant halo nuclei may heavily depend on the pairing strength and density functional used.
