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浏览/检索结果: 共65条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序发表日期升序发表日期降序题名升序题名降序作者升序作者降序 Pure spin current generation with photogalvanic effect in graphene interconnect junctions 期刊论文  OAI收割 NANOPHOTONICS, 2021, 卷号: 10 作者:  Zhou, Yan-Hong;  Yu, Shaohui;  Li, Yuejun;  Luo, Xin;  Zheng, Xiaohong   |  收藏  |  浏览/下载：15/0  |  提交时间：2021/06/15 density functional theory  graphene  photon  pure spin current  spintronics   The braking index of PSR B0540-69 and the associated pulsar wind nebula emission after spin-down rate transition 期刊论文  OAI收割 Monthly Notices of the Royal Astronomical Society, 2020, 卷号: 494, 页码: 1865-1870 作者:  HXMT   |  收藏  |  浏览/下载：40/0  |  提交时间：2022/02/08 stars: magnetic field  stars: neutron  pulsars: general  Astrophysics  - High Energy Astrophysical Phenomena  Abstract: In 2011 December, PSR B054-69 experienced a spin-down rate transition (SRT), after which the spin-down power of the pulsar increased by $\sim 36{{\ \rm per\ cent}}$. About 1000 d after the SRT, the X-ray luminosity of the associated pulsar wind nebula (PWN) was found to brighten by $32\pm 8{{\ \rm per\ cent}}$. After the SRT, the braking index n of PSR B0540-69 changes from n = 2.12 to 0.03 and then keeps this value for about five years before rising to n = 0.9 in the following years. We find that most of the current models have difficulties in explaining the measured braking index. One exceptive model of the braking index evolution is the increasing dipole magnetic field of PSR B0540-69. We suggest that the field increase may result from some instabilities within the pulsar core that enhance the poloidal component at the price of toroidal component of the magnetic field. The increasing dipole magnetic field will result in the X-ray brightening of the PWN. We fit the PWN X-ray light curve by two models: one assumes a constant magnetic field within the PWN during the brightening and the other assumes an enhanced magnetic field proportional to the energy density of the PWN. It appears that the two models fit the data well, though the later model seems to fit the data a bit better. This provides marginal observational evidence that magnetic field in the PWN is generated by the termination shock. Future high-quality and high-cadence data are required to draw a solid conclusion.   Reactivity descriptors of diverse copper-oxo species on ZSM-5 zeolite towards methane activation 期刊论文  OAI收割 CATALYSIS TODAY, 2019, 卷号: 338, 页码: 108-116 作者:  Wang, Guiru;  Chen, Wei;  Huang, Ling;  Liu, Zhiqiang;  Sun, Xianyong   |  收藏  |  浏览/下载：65/0  |  提交时间：2019/12/06 Cu-oxo-species  Zeolite  Spin density  Methane activation  Descriptors   Difference in physical properties of MAX-phase compounds Cr2GaC and Cr2GaN induced by an anomalous structure change in Cr2GaN 期刊论文  OAI收割 INTERMETALLICS, 2019, 卷号: 105, 期号: 无, 页码: 39-43 作者:  Tong, Haiyun;  Lin, Shuai;  Huang, Yanan;  Tong, Peng;  Song, Wenhai   |  收藏  |  浏览/下载：8/0  |  提交时间：2020/03/31 MAX-phase compound  Anomalous structure change  Electrical/thermal transport properties  Spin-density-wave  Microtopography   Stretch/Compress-Modulated Spin Splitting in One-Dimensional Melem Chain with a Helical Structure 期刊论文  OAI收割 Physica Status Solidi-Rapid Research Letters, 2019, 卷号: 13, 期号: 10, 页码: 5 作者:  D.Han;  X.J.Chen;  H.Xu;  C.Jiao;  J.L.Xu   |  收藏  |  浏览/下载：12/0  |  提交时间：2020/08/24 density functional theory,helical structures,molecule chains,spin-orbit coupling,spin splitting,rashba,nanowire,Materials Science,Physics   Nucleon effective masses in neutron-rich matter 期刊论文  OAI收割 PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 2018, 卷号: 99, 页码: 29-119 作者:  Li, BA;  Cai, BJ;  Chen, LW;  Xu, J   |  收藏  |  浏览/下载：32/0  |  提交时间：2018/09/06 Heavy-ion Collisions  Equation-of-state  Short-range Correlations  Level Density Parameter  Correlated Fermi Gas  Momentum-dependent Interactions  Dirac Optical Potentials  Isotopic Spin Dependence  Effective-field Theory  Hartree-fock Approach   ESR study of free radicals in polysilazane irradiated by gamma rays 期刊论文  OAI收割 RADIATION PHYSICS AND CHEMISTRY, 2018, 卷号: 151, 期号: -, 页码: 108-113 作者:     |  收藏  |  浏览/下载：52/0  |  提交时间：2019/12/17 ELECTRON-SPIN-RESONANCE  ADVANCED CERAMICS  SIC FIBERS  POLYCARBOSILANE  POLYMER  OXIDATION  POLYVINYLSILANE  DEGRADATION  DENSITY   Atomic scale electronic structure of the ferromagnetic semiconductor Cr2Ge2Te6 期刊论文  OAI收割 SCIENCE BULLETIN, 2018, 卷号: 63 -   |  收藏  |  浏览/下载：9/0  |  提交时间：2020/10/26 TRANSITION-METAL DICHALCOGENIDES  P-N-JUNCTIONS  SPINTRONICS  CRYSTALS  MOS2  SPIN  Ferromagnetic semiconductor  Electronic structure  Scanning tunneling microscopy  Density functional theory