搜索结果: 1-15 共查到“凝聚态物理学 spin”相关记录79条 . 查询时间(0.078 秒)
利用有效场理论研究了纳米管上双模随机同向晶场中混合自旋Blume-Capel模型格点的平均磁化强度，得到了系统格点的平均磁化强度与双模随机晶场的取值概率、外磁场、晶场参数和晶场强度比值的关系。结果表明：取值概率、外磁场、交换相互作用、晶场强度比值和晶场强度等诸多因素相互竞争，使系统表现出比恒定晶场作用的Blume-Capel模型更为丰富的磁化现象；双模随机同向晶场会抑制系统的平均磁化强度，使其基态...
‘Spooky’ Sightings in Crystal Point to Extremely Rare Quantum Spin Liquid
Spooky Sightings Crystal Point Quantum Spin Liquid
2016/12/13
Inside a new exotic crystal, physicist Martin Mourigal has observed strong indications of “spooky” action, and lots of it. The results of his experiments, if corroborated over time, would mean th...
Block magnetism coupled with local distortion in the iron-based spin-ladder compound BaFe2Se3
Block magnetism local distortion iron-based spin-ladder compound BaFe2Se3
2012/2/27
Magnetism in the insulating BaFe$_2$Se$_3$ was examined through susceptibility, specific heat, resistivity and neutron diffraction measurements. After formation of a short-range magnetic correlation, ...
Quantum percolation in quantum spin Hall antidot systems
Quantum percolation quantum spin Hall antidot systems
2012/2/27
We study the influences of antidot-induced bound states on transport properties of two- dimensional quantum spin Hall insulators. The bound statesare found able to induce quantum percolation in the or...
Highly tunable spin-dependent electron transport through carbon atomic chains connecting two zigzag graphene nanoribbons
Highly tunable spin-dependent electron transport carbon atomic chains zigzag graphene nanoribbons
2012/2/27
Motivated by recent experiments of successfully carving out stable carbon atomic chains from graphene [Meyer et al. Nature (London) 454, 319 (2008); Jin et al. Phys. Rev. Lett. 102, 205501 (2009)] we ...
Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
Spin current polarization reversal single-molecule magnet ferromagnetic electrodes
2012/2/27
We theoretically study the spin-polarized transport through a single-molecule magnet, which is weakly coupled to ferromagnetic leads, by means of the rate-equation approach. We consider both the ferro...
Impurity-assisted Andreev reflection at a spin-active half-metal-superconductor interface
Impurity-assisted Andreev reflection spin-active half-metal-superconductor interface
2012/2/27
The Andreev reflection amplitude at a clean interface between a half-metallic ferromagnet (H) and a superconductor (S) for which the half metal's magnetization has a gradient perpendicular to the inte...
Homogeneous populations of oscillators have recently been shown to exhibit stable coexistence
of coherent and incoherent regions. Generalizing the concept of chimera states to the context of order-di...
Optical detection of spin transport in non-magnetic metals
Optical detection of spin transport non-magnetic metals
2010/11/24
We determine the dynamic magnetization induced in non-magnetic metal wedges composed of
silver, copper and platinum by means of Brillouin light scattering (BLS) microscopy. The magnetization is trans...
Atomistic theory of spin relaxation in self-assembled In$_{1-x}$Ga$_x$As/GaAs quantum dots at zero magnetic field
Atomistic theory spin relaxation zero magnetic field
2010/11/25
We present full atomistic calculations of the spin-flip time (T1) of electrons and holes mediated by acoustic phonons in self-assembled In1−xGaxAs/GaAs quantum dots at zero magnetic field. At lo...
Spin and Charge Fluctuations in the $\alpha$-structure Layered Nitride Superconductors
Spin Charge Fluctuations alpha$-structure Layered Nitride Superconductors
2010/11/24
To explore conditions underlying the superconductivity in electron-doped TiNCl where Tc = 16
K, we calculate the electronic structure, Wannier functions and spin and charge usceptibilities
using rs...
Anisotropic spin fluctuations and superconductivity in "115'' heavy fermion compounds: 59Co NMR study in PuCoGa5
StoAnisotropic spin fluctuations superconductivity NMR study in PuCoGa5
2010/11/24
We report results of 59Co nuclear magnetic resonance measurements on a single crystal of super-
conducting PuCoGa5 in its normal state. The nuclear spin-lattice relaxation rates and the Knight shifts...
Spin canting as a result of the competition between stripes and spirals in cuprates
Spin canting spirals in cuprates
2010/11/24
Based on the extended Hubbard model we calculate the energy of stripe and spiral ground states.
We find that uniform spirals get favored by a large t′/t ratio but are unstable at small doping towards...
Observation of the developed Cu-spin correlation in the Bi-2201 high-Tc superconductor using muon spin relaxation
Observation of the developed Cu-spin correlation muon spin relaxation
2010/11/24
A systematic muon-spin-relaxation study in Bi-2201 high-Tc cuprates has revealed for the first
time that the Cu-spin correlation (CSC) is developed at low temperatures below 2 K in a wide
range of h...
On a microcanonical relation between continuous and discrete spin models
microcanonical relation ontinuous discrete spin models
2010/11/24
A relation between a class of stationary points of the energy landscape of continuous spin mod-
els on a lattice and the configurations of a Ising model defined on the same lattice suggests an approx...