"Rectifying" reflection from a magnetic photonic crystal (2009)
Liu, Shiyang, Lu, Wanli, Lin, Zhifang, Chui, S. T.
When an oscillating line source is placed in front of a special mirror consisting of an array of flat uniformly spaced ferrite rods, half of the image disappeared at some frequency. We believe that...
Grain Boundary Roughening Transitions (2009)
We consider the roughening of small angle grain boundaries consisting of arrays of dislocations and found two transitions, corresponding to fluctuations of the dislocations along and perpendicular to...
Long wavelength limit of two dimensional photonic crystals (2008)
We solve {\bf analytically} the multiple scattering (KKR) equations for the two dimensional photonic crystals in the long wavelength limit. Different approximations of the electric and magnetic...
Formation of robust and completely tunable resonant photonic band gaps (2008)
Liu, Shiyang, Du, Junjie, Lin, Zhifang, Wu, Ruixin, Chui, S. T.
We identify different types of the photonic band gaps (PBGs) of two dimensional magnetic photonic crystals (MPCs) consisting of arrays of magnetic cylinders and study the different tunability (by an...
Chui, S. T., Zhang, Y., Xzhou, Lei
We derived simple polynomial equations to determine the entire resonance spectra of split ring structures. For double stacking split rings made with flat wires, we showed that the resonance frequency...
Large voltage from spin pumping in magnetic tunnel junctions (2007)
We studied the response of a ferromagnet-insulator-normal metal tunnel structure under an external oscillating radio frequency (R.F.) magnetic field. The D. C. voltage across the junction is...
Electron-like and photon-like excitations in an ultracold Bose-Fermi atom mixture (2006)
We show that the electron-like and photon-like excitations may exist in a three-dimensional Bose-Fermi Hubbard model describing ultracold Bose-Fermi atom mixtures in optical lattices. In a Mott...
We show that the 'electron' and 'photon' can emerge from a supersymmetric Hubbard model which is a non-relativistic theory of the neutral particles. The Higgs boson and 'photon' may not appear in the...
We perform a comparative study of the finite temperature behavior of ultracold Bose atoms in optical lattices by the slave fermion and the slave boson approaches to the Bose Hubbard model. The phase...
Luttinger liquid with strong spin-orbital coupling and Zeeman splitting in quantum wires (2004)
Yu, Yue, Wen, Yuchuan, Li, Jinbin, Su, Zhaobin, Chui, S. T.
We study a one-dimensional interacting electron gas with the strong Rashba spin-orbit coupling and Zeeman splitting in a quantum well. A bosonization theory is developed for this system. The...
Non conservation of the magnetization current across magnetic hetero-structures (2003)
We show that when the magnetizations on opposite sides of a junction are not collinear, the magnetization current is not conserved as the junction is crossed. Thus the usual treatment of this problem...
Left-handed materials in metallic magnetic granular composites (2003)
There is recently interests in the ``left-handed '' materials. In these materials the direction of the wave vector of electromagnetic radiation is opposite to the direction of the energy flow. We...
Insulator-Superfluid transition of spin-1 bosons in an optical lattice in magnetic field (2003)
Svidzinsky, A. A., Chui, S. T.
We study the insulator-superfluid transition of spin-1 bosons in an optical lattice in a uniform magnetic field. Based on a mean-field approximation we obtained a zero-temperature phase diagram. We...
Wu, Wei, Li, Jinbin, Yu, Yue, Chui, S. T.
We consider the effect of the Rashba spin-orbital interaction and space charge in a ferromagnet-insulator/semiconductor/insulator-ferromagnet junction where the spin current is severely affected by...
Electron space charge effect on spin injection into semiconductors (2002)
Yu, Yue, Li, Jinbin, Chui, S. T.
We consider spin polarized transport in a ferromagnet-insulator/semiconductor/insulator-ferromagnet (F1-I-S-I-F2) junction. We find that the spin current is strongly dependent on the spin...
Collapse transition in mixtures of Bosons and Fermions (2002)
For mixtures of Bose and Fermi alkali atoms, the Fermion degrees of freedom can be integrated out in their {\bf finite temperature} partition function. The final result can be expanded as a power...
Current induced magnetization switching in magnetic tunnel junctions (2002)
Lin, Z. F., Chui, S. T., Hu, L. B.
A new mechanism different from the spin accumulation picture is proposed for the current induced magnetization switching in magnetic tunnel junctions by taking into account the effect of the electron...
Chui, S. T., Ryzhov, V. N., Tareyeva, E. E.
The system of two simultaneously trapped codensates consisting of $^{87}Rb$ atoms in two different hyperfine states is investigated theoretically in the case when the minima of the trapping...
Statics and dynamics of phase segregation in multicomponent fermion gas (2001)
Esfarjani, K., Chui, S. T., Kumar, V., Kawazoe, Y.
We investigate the statics and dynamics of spatial phase segregation process of a mixture of fermion atoms in a harmonic trap using the density functional theory. The kinetic energy of the fermion...
We investigate the possibility of preparing left-handed materials in metallic magnetic granular composites. Based on the effective medium approximation, we show that by incorporating metallic...
Realization of an ultra-high magnetic field on a nano-scale (2000)
Chui, S. T., Zhou, Li, Esfarjani, K., Kawazoe, Y.
In tunnel junctions of which at least one side is a ferromagnet, very large magnetic polarization change ($\approx 0.1 \mu_B$) and splitting of the spin up and spin down Fermi energy ($\approx 0.1...
Hadjipanayis,G. C., Tang,W., Zhang,Y., Chui,S. T., Liu,J. F., Chen,C., ...
Vortex states in binary mixture of Bose-Einstein condensates (2000)
Chui, S. T., Ryzhov, V. N., Tareyeva, E. E.
The vortex configurations in the Bose-Einstein condensate of the mixture of two different spin states |F=1,m_f=-1> and |2,1> of ^{87}Rb atoms corresponding to the recent experiments by Matthews et....
Phase separation and vortex states in binary mixture of Bose-Einstein condensates (2000)
Chui, S. T., Ryzhov, V. N., Tareyeva, E. E.
The phase separation and vortex states in two-component Bose-Einstein condensate consisting of $|F=1,m_f=-1>$ and $|2,1>$ internal spin states of $^{87}Rb$ atoms are considered in the framework of...
Two stages of quantum spinodal decomposition is proposed and analyzed for this highly non-equilibrium process. Both time and spatial scales for the process are found. Qualitative agreement with...
Quantum Spinodal Decomposition in Multicomponent Bose-Einstein Condensates (1999)
We investigate analytically the non-equilibrium spatial phase segregation process of a mixture of alkali Bose-Einstein condensates. Two stages (I and II) are found in analogy to the classical...
Binary Bose-Einstein Condensate Mixtures in Weakly and Strongly Segregated Phases (1998)
We perform a mean-field study of the binary Bose-Einstein condensate mixtures as a function of the mutual repulsive interaction strength. In the phase segregated regime, we find that there are two...
Soliton and 2D domains in ultra-thin magnetic films (1996)
We show that many two dimensional domain patterns observed in Monte Carlo simulations can be obtained from the many soliton solutions of the imaginary time Sine Gordon equation. This opens the door...
First principle understanding of the phonon structure of transition metals. (1972)
Thesis (Ph. D.)--Princeton.