期刊：
Journal of Materials Chemistry C,2015年3(13):3189-3197 ISSN：2050-7526
通讯作者：
Liu, Li-Min
作者机构：
[Tang, Zhen-Kun; Zhang, Yan-Ning; Li, Xi-Bo; Liu, Li-Min] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Phys, Hengyang 421008, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Elect, Hengyang 421008, Peoples R China.;[Zhang, Yan-Ning] Chengdu Green Energy & Green Mfg Technol R&D Ctr, Chengdu 610207, Sichuan, Peoples R China.
通讯机构：
[Liu, Li-Min] B;Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
摘要：
In order to design the high-performance spintronics, it is rather critical to develop new materials, which can easily regulate the magnetism of nanostructures. In this work, the electronic properties of two dimensional (2D) square-pyramidal vanadium dioxide (S-VO2) are explored based on first-principles calculations. The results reveal that the monolayer S-VO2 is an ideal flexible platform to manipulate the magnetic properties by either biaxial compressive strain or surface modification. Although the ground state of the pristine S-VO2 is a direct semiconductor with antiferromagnetic (AFM) coupling between two nearest V atoms, the monolayer S-VO2 becomes ferromagnetic (FM) under a biaxial compressive strain. Furthermore, the monolayer S-VO2 can be tuned from a nonmagnetic semiconductor to a magnetic semiconductor and even to a half-metal through surface modification. The tunable magnetic properties of the monolayer S-VO2 make it a promising candidate for applications in spin-devices.
作者机构：
[Lau, Woon-Ming; Tang, Zhen-Kun; Zhang, Yan-Ning; Liu, Li-Min] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Phys, Hengyang 421008, Peoples R China.;[Zhang, Deng-Yu; Tang, Zhen-Kun] Hengyang Normal Univ, Dept Elect, Hengyang 421008, Peoples R China.;[Lau, Woon-Ming; Zhang, Yan-Ning] Chengdu Green Energy & Green Mfg Technol R&D Ctr, Chengdu 610207, Sichuan, Peoples R China.
通讯机构：
[Liu, Li-Min] B;Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
摘要：
Three-dimensional (3D) hybrid layered materials receive a lot of attention because of their outstanding intrinsic properties and wide applications. In this work, the stability and electronic structure of three-dimensional graphene-MoS2 (3DGM) hybrid structures are examined based on first-principle calculations. The results reveal that the 3DGMs can easily self-assembled by graphene nanosheet and zigzag MoS2 nanoribbons, and they are thermodynamically stable at room temperature. Interestingly, the electronic structures of 3DGM are greatly related to the configuration of joint zone. The 3DGM with odd-layer thickness MoS2 nanoribbon is semiconductor with a small band gap of 0.01-0.25 eV, while the one with even-layer thickness MoS2 nanoribbon exhibits metallic feature. More importantly, the 3DGM with zigzag MoS2 nanoribbon not only own the large surface area and effectively avoid the aggregation between the different nanoribbons, but also can remarkably enhance Li adsorption interaction, thus the 3DGM have the great potential as high performance lithium ion battery cathodes.
通讯机构：
[Wang, Xin-Wen] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421002, Peoples R China.
关键词：
Remote information concentration;multipartite entanglement;qudit
摘要：
Telecloning and its reverse process, referred to as remote information concentration (RIC), have attracted considerable interest because of their potential applications in quantum-information processing. We here present a general scheme for RIC in d-level systems (qudits), in which the quantum information initially distributed in many spatially separated qudits can be remotely and deterministically concentrated to a single qudit via an entangled channel without performing any global operations. We show that the entangled channel of RIC can be different types of entangled states, including mixed states as well as pure ones. More interestingly, these mixed states include a bound entangled state which has a similar form to the generalized Smolin state but has different characteristics from it. We also show that there exists a multipartite entangled state which can be used to implement both telecloning and RIC in the two-level system. Our many-to-one RIC protocol could be slightly modified to perform some types of many-to-many RIC tasks.
摘要：
Scattering problem are of fundamental importance in quantum physics and and play also an important role in other fields such as astrophysics , chemistry , plasma physics and laser physics and so on .However ,the scattering of a paricle by a real potential in most textbooks are considered .In this paper , we have dicussed in some detail the typical problem of the quantum theory of scattering by a central complex potential using the method of partial waves , and we obtained the total cross-section .
作者机构：
[肖德涛; 高峰] College of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[张登玉; 高峰] Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China
通讯机构：
College of Nuclear Science and Technology, University of South China, China
摘要：
It has been shown that two-photon parity check has widespread applications in optical quantum information processing. In recent years much effort has been made to implement nondestructive two-photon parity detection using cross-Kerr nonlinearity (XKNL) effect. We here put forward an XKNL-based scheme for nearly deterministic two-photon parity detection without destroying the photons, in which the required cross-Kerr phase shift could be much (even several orders of magnitude) smaller than that required for previous schemes. The scheme utilizes a ring cavity fed by a coherent state beam as a quantum information bus which interacts with one of the two path modes of two polarized photons through a cross-Kerr medium. The measurement outcome of the bus mode reveals the polarization-parity of the two photons.
