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Bose-Einstein Condensates in Superlattices
Superlattice research cigar-shaped bose Einstein condensation amplitude modulation wave the wave function space modulation state
2014/12/29
We consider the Gross--Pitaevskii (GP) equation in the presence of periodic and quasi-periodic superlattices to study cigar-shaped Bose--Einstein condensates (BECs) in such potentials. We examine spat...
Dynamics and manipulation of matter-wave solitons in optical superlattices
Similar soliton optical superlattice dynamic superlattice lattice structure
2014/12/25
We study the existence and stability of bright, dark, and gap matter-wave solitons in optical superlattices. Then, using these properties, we show that (time-dependent) “dynamical superlattices” can b...
Manipulating infrared photons using plasmons in transparent graphene superlattices
Manipulating infrared photons plasmons transparent graphene superlattices
2012/2/27
Superlattices are artificial periodic nanostructures which can control the flow of electrons. Their operation typically relies on the periodic modulation of the electric potential in the direction of ...
Optical Properties of (SrMnO3)n/(LaMnO3)2n superlattices: an insulator-to-metal transition observed in the absence of disorder
Optical Properties insulator-to-metal transition absence of disorder
2010/11/23
We measure the optical conductivity 1(!) of (SrMnO3)n/(LaMnO3)2n superlattices (SL) for
n = 1, 3, 5, and 8 and 10 < T < 400 K. Data show a T -dependent insulator to metal transition
(IMT) for n 3...
Localized vs. delocalized character of charge carriers in LaAlO3/ SrTiO3 superlattices
Localized vs. delocalized character charge carriers
2010/11/24
Understanding the nature of electrical conductivity, superconductivity and magnetism between
layers of oxides is of immense importance for the design of electronic devices employing oxide
heterostru...
Nonequilibrium free energy, H theorem and self-sustained oscillations for Boltzmann-BGK descriptions of semiconductor superlattices
Nonequilibrium processes Boltzmann equation current fluctuations
2010/11/22
Semiconductor superlattices (SL) may be described by a Boltzmann-Poisson kinetic equation with a Bhatnagar-Gross-Krook (BGK) collision term which preserves charge, but not momentum or energy.
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing of coherent optical phonons
2010/11/23
Femtosecond dynamics of coherent optical phonons in GeTe/Sb2Te3 superlattices (SLs), a new
class of semiconductor SLs with three different states, have been investigated by using a reflectiontype pum...
Ultrafast dephasing of coherent optical phonons in atomically controlled GeTe/Sb$_{2}$Te$_{3}$ superlattices
Ultrafast dephasing coherent optical phonons
2010/11/18
Femtosecond dynamics of coherent optical phonons in GeTe/Sb$_{2}$Te$_{3}$ superlattices (SLs), a new class of semiconductor SLs with three different states, have been investigated by using a reflecti...
Stochastic webs and quantum transport in superlattices: an introductory review
stochastic webs quantum transport superlattices separatrix chaos
2010/4/7
Stochastic webs were discovered, first by Arnold for multi-dimensional Hamiltonian systems, and later by Chernikov et al. for the low-dimensional case. Generated by weak perturbations, they consist of...
Two-dimensional solitons at interfaces between binary superlattices and homogeneous lattices
two-dimensional surface solitons superlattice homogeneous square lattice
2010/4/8
We report on the experimental observation of two-dimensional surface solitons residing at the interface between a homogeneous square lattice and a superlattice that consists of alternating "deep" and ...
Stability properties of periodically driven overdamped pendula and their implications to physics of semiconductor superlattices and Josephson junctions
differential equation time dependence sinusoidal nonlinearity
2010/4/8
We consider the first order differential equation with a sinusoidal nonlinearity and periodic time dependence, that is, the periodically driven overdamped pendulum. The problem is studied in the case ...
Photoluminescence characterization of AlGaAs/GaAs test superlattices used for optimization of quantum cascade laser technology
photoluminescence spectroscopy quantum cascade lasers
2011/5/11
In this paper, we present the application of photoluminescence spectroscopy as a diagnostic method for evaluation of correctness and homogeneity of AlGaAs/GaAs test superlattices used in the developm...
Interface influence on structural properties of InAs/GaSb type-II superlattices
interface II type superlattice InAs/GaSb
2011/5/11
Theoretical studies of interface impact on structural properties of InAs/GaSb type-II superlattices were carried out. Multilayer structures used for mid-infrared detection were considered. The superla...
Correlation between physical properties of superlattices obtained by means of electrochemical deposition method and ion spraying
multilayer systems superlattice ion sputtering
2011/5/10
This paper compares structural and magnetic properties of Cu/Ni and Ni/Cu multilayer systems obtained by means of ion sputtering and electrochemical deposition method. The impact of both thickness of ...
Current Oscillation and dc-Voltage-Controlled Chaotic Dynamics in
Semiconductor Superlattices
semiconductor superlattices current oscillation chaotic dynamics
2007/8/15
2006Vol.45No.2pp.363-368DOI:
Current Oscillation and dc-Voltage-Controlled Chaotic Dynamics in
Semiconductor Superlattices
WANG Chang and LÜ Jing-Tao
State Key Labo...