Prediction of magnetic storm events using the Dst index (2005)
V. V. Anh, Z. G. Yu, J. A. Wanliss, S. M. Watson
This paper provides a method to predict magnetic storm events based on the time series of the Dst index over the period 1981-2002. This method is based on the multiple scaling of the measure...
Prediction of magnetic storm events using the Dst index (2005)
Anh, V. V., Yu, Z. G., Wanliss, J. A., Watson, S. M.
This paper provides a method to predict magnetic storm events based on the time series of the Dst index over the period 1981-2002. This method is based on the multiple scaling of the measure...
Prediction of magnetic storm events using the Dst index (2005)
Anh, V. V., Yu, Z. G., Wanliss, J. A., Watson, S. M.
This paper provides a method to predict magnetic storm events based on the time series of the Dst index over the period 1981-2002. This method is based on the multiple scaling of the measure...
Vibrational edge modes in intrinsically heterogeneous doped transition metal oxides (2004)
Martin, I., Kaneshita, E., McQueeney, R. J., Yu, Z. G., Bishop, A. R.
By applying an unrestricted Hartree-Fock and a Random Phase approximations to a multiband Peierls-Hubbard Hamiltonian, we study the phonon mode structure in models of transition metal oxides in the...
Very large magnetoresistance in lateral ferromagnetic (Ga,Mn)As wires with nanoconstrictions (2003)
Ruester, C., Borzenko, T., Gould, C., Schmidt, G., Molenkamp, L. W., Liu, X., ...
We have fabricated (Ga,Mn)As nanostructures in which domain walls can be pinned by sub-10 nm constrictions. Controlled by shape anisotropy, we can switch the regions on either side of the...
Circularly polarized electroluminescence in spin-LED structures (2003)
Yu, Z. G., Lau, W. H., Flatte', M. E.
We calculate circularly polarized luminescence emitted parallel (vertical emission) and perpendicular (edge emission) to the growth direction from a quantum well in a spin light-emitting diode...
Vibrational edge modes in intrinsically inhomogeneous doped transition metal oxides (2003)
Martin, I., McQueeney, R. J., Bishop, A. R., Yu, Z. G.
By applying an unrestriced Hartree-Fock approximation and a Random Phase approximation to multiband Peierls-Hubbard Hamiltonians, we determine the phonon mode structure in models of transition metal...
Recognition of an organism from fragments of its complete genome (2002)
Anh, V. V., Lau, K. S., Yu, Z. G.
This paper considers the problem of matching fragment to organism using its complete genome. Our method is based on the probability measure representation of a genome. We first demonstrate that these...
Spin diffusion and injection in semiconductor structures: Electric field effects (2002)
In semiconductor spintronic devices, the semiconductor is usually lightly doped and nondegenerate, and moderate electric fields can dominate the carrier motion. We recently derived a drift-diffusion...
Electric-field dependent spin diffusion and spin injection into semiconductors (2002)
We derive a drift-diffusion equation for spin polarization in semiconductors by consistently taking into account electric-field effects and nondegenerate electron statistics. We identify a high-field...
Charge localization and phonon spectra in hole doped La2NiO4 (2000)
McQueeney, R. J., Bishop, A. R., Yi, Ya-Sha, Yu, Z. G.
The in-plane oxygen vibrations in La2NiO4 are investigated for several hole-doping concentrations both theoretically and experimentally via inelastic neutron scattering. Using an inhomogeneous...
Stojkovic, Branko P., Yu, Z. G., Chernyshev, A. L., Bishop, A. R., Neto, A. H. Castro, Gronbech-Jensen, Niels
The competition between long-range and short-range interactions among holes moving in an antiferromagnet (AF), is studied within a model derived from the spin density wave picture of layered...
Charge Ordering in Layered Transition Metal Oxides (1999)
Branko P. Stojkovic, Z. G. Yu, A. R. Bishop, N. Grønbech-Jensen
We study the competition between long-range and short-range interactions among holes within the spin density wave picture of layered transition metal oxides. We focus on the problem of charge...
Charge ordering and long-range interactions in layered transition metal oxides (1998)
Stojkovic, Branko P., Yu, Z. G., Bishop, A. R., Neto, A. H. Castro, Gronbech-Jensen, Niels
We study the competition between long-range and short-range interactions among holes within the spin density wave picture of layered transition metal oxides. We focus on the problem of charge...
Excitons in two coupled conjugated polymer chains (1997)
Yu, Z. G., Wu, M. W., Rao, X. S., Sun, X., Bishop, A. R.
We have studied the exciton states in two coupled conjugated polymer chains which are modeled individually by the Su-Schrieffer-Heeger Hamiltonian and coupled by an interchain electron-transfer term....
Excitons in quasi-one dimensional organics: Strong correlation approximation (1997)
Yu, Z. G., Saxena, A., Bishop, A. R.
An exciton theory for quasi-one dimensional organic materials is developed in the framework of the Su-Schrieffer-Heeger Hamiltonian augmented by short range extended Hubbard interactions. Within a...