The dependence of hole resonances in Si on the wave vector component along the direction of magnetic induction (II)

1972 ◽  
Vol 12 (2) ◽  
pp. 465-470
Author(s):  
M. Owner-Petersen
Keyword(s):  
Wave Vector ◽  
Magnetic Induction ◽  
Vector Component ◽  
Wave Vector Component

Reflection and Transmission of Waves in Pyroelectric Body

2010 ◽  
Author(s):  
Xiaoguang Yuan ◽  
ZhenBang Kuang
Keyword(s):  
Surface Wave ◽  
Boundary Conditions ◽  
Wave Vector ◽  
Interface Plane ◽  
Bulk Wave ◽  
Two Dimensional ◽  
Reflection And Transmission ◽  
Bulk Waves ◽  
Temperature Waves ◽  
Wave Vector Component

The reflection and transmission theory of waves in pyroelectric medium is studied in this paper. In general in an infinite homogeneous pyroelectric medium there are four bulk wave modes: quasi-longitudinal, two quasi-transversal and temperature waves. However there are five boundary conditions in the reflection and transmission problem of the pyroelectric medium. In this paper we find that the surface wave will be revealed to satisfy the boundary conditions with other four bulk waves. The surface wave has the same wave vector component with the incident bulk waves on the interface plane. The two dimensional reflection problems of waves at the interface between the semi-infinite pyroelectric medium and vacuum is researched and an numerical example is given.

Polarization and bandgap characteristics of monolayer black phosphoene in magnetic field

2020 ◽  
Vol 34 (28) ◽  
pp. 2050314
Author(s):  
Cuilan Zhao ◽  
Jiali Liu
Keyword(s):  
Magnetic Field ◽  
Ground State Energy ◽  
Wave Vector ◽  
Ground State ◽  
Magnetic Induction ◽  
State Energy ◽  
Phonon Interaction ◽  
Interaction System ◽  
Black Phosphorene ◽  
Magnetic Induction Intensity

The effect of magnetic field on the polarization effect of black phosphorene is studied. The ground state energy and the relevant energy bandgap formula of carrier and carrier–phonon interaction system is derived in turn, and the effect of applied magnetic field on ground state energy and bandgap is also investigated, by the method of variational method, LLP unitary transformation method and linear combination operator method. When the substrate is given, the ground state energy and the relevant bandgap of the carrier–phonon interaction system changes with the magnetic induction intensity, phonon energy and cutoff wave vector. It can be shown by numerical calculation: The ground state energy and the relevant bandgap of the Hole and the Hole–phonon interaction system in black phosphorene increases with increase in magnetic induction intensity [Formula: see text]. The ground state energy of the Hole, Hole–phonon system and the relevant bandgap are different when the substrate is different. Under the action of a magnetic field, the ground state energy of the Hole and Hole–phonon system and bandgap decreases with increase in phonon energy and increases with increase in cutoff wave vector when the substrate is fixed.

Electron Tunneling in Small-Area Junctions

2003 ◽  
Vol 17 (13n14) ◽  
pp. 763-769
Author(s):  
Alexander I. Khachaturov
Keyword(s):  
Bias Voltage ◽  
Wave Vector ◽  
Small Area ◽  
Electron Tunneling ◽  
Resonance Structure ◽  
Tunneling Conductance ◽  
Second Derivative ◽  
Tunnel Current ◽  
Lateral Wave ◽  
Wave Vector Component

Electron tunneling in small-area junctions has been treated. It is found that at the appropriate set of barrier parameters and electronic characteristics of the electrodes, the quantization of the lateral wave vector component manifests itself in the differential tunneling conductance as quite noticeable singularities. The dependance of the second derivative of the tunnel current versus the bias voltage calculated for the perfectly smooth quantized electrode should contain distinct periodic dips. It is shown that for real not perfectly smooth electrodes the resonance structure caused by the commensurate states may be observed.

Effects of Higher-Order Laue Zone reflections on structure images

1993 ◽  
Vol 51 ◽  
pp. 450-451
Author(s):  
H. S. Kim ◽  
S. S. Sheinin
Keyword(s):  
Wave Vector ◽  
Theoretical Calculations ◽  
Reciprocal Lattice ◽  
Image Plane ◽  
Bloch Wave ◽  
Dynamical Theory ◽  
Higher Order ◽  
Lattice Image ◽  
Lattice Vector ◽  
Image Position

The importance of image simulation in interpreting experimental lattice images is well established. Normally, in carrying out the required theoretical calculations, only zero order Laue zone reflections are taken into account. In this paper we assess the conditions for which this procedure is valid and indicate circumstances in which higher order Laue zone reflections may be important. Our work is based on an analysis of the requirements for obtaining structure images i.e. images directly related to the projected potential. In the considerations to follow, the Bloch wave formulation of the dynamical theory has been used.The intensity in a lattice image can be obtained from the total wave function at the image plane is given by: where ϕg(z) is the diffracted beam amplitide given by In these equations,the z direction is perpendicular to the entrance surface, g is a reciprocal lattice vector, the Cg(i) are Fourier coefficients in the expression for a Bloch wave, b(i), X(i) is the Bloch wave excitation coefficient, ϒ(i)=k(i)-K, k(i) is a Bloch wave vector, K is the electron wave vector after correction for the mean inner potential of the crystal, T(q) and D(q) are the transfer function and damping function respectively, q is a scattering vector and the summation is over i=l,N where N is the number of beams taken into account.

Analysis of magneto rheological elastomers for energy harvesting systems

2020 ◽  
Vol 64 (1-4) ◽  
pp. 439-446
Author(s):  
Gildas Diguet ◽  
Gael Sebald ◽  
Masami Nakano ◽  
Mickaël Lallart ◽  
Jean-Yves Cavaillé
Keyword(s):  
Magnetic Field ◽  
Energy Harvesting ◽  
Shear Strain ◽  
Magnetic Induction ◽  
Magnetic Particles ◽  
Homogeneous Magnetic Field ◽  
Electrical Signal ◽  
Harvesting Systems ◽  
Dc Bias ◽  
Magneto Rheological

Magneto Rheological Elastomers (MREs) are composite materials based on an elastomer filled by magnetic particles. Anisotropic MRE can be easily manufactured by curing the material under homogeneous magnetic field which creates column of particles. The magnetic and elastic properties are actually coupled making these MREs suitable for energy conversion. From these remarkable properties, an energy harvesting device is considered through the application of a DC bias magnetic induction on two MREs as a metal piece is applying an AC shear strain on them. Such strain therefore changes the permeabilities of the elastomers, hence generating an AC magnetic induction which can be converted into AC electrical signal with the help of a coil. The device is simulated with a Finite Element Method software to examine the effect of the MRE parameters, the DC bias magnetic induction and applied shear strain (amplitude and frequency) on the resulting electrical signal.

Research on expanding the range of reproduction of magnetic flux density of the DC field of the state primary standard GET12-2011

2020 ◽  
pp. 3-7
Author(s):  
Vladlen Ya. Shifrin ◽  
Denis I. Belyakov ◽  
Alexander E. Shilov ◽  
Denis D. Kosenko
Keyword(s):  
Magnetic Flux ◽  
Magnetic Induction ◽  
Frequency Conversion ◽  
Magnetic Measurements ◽  
Primary Standard ◽  
Uncertainty Budget ◽  
The State ◽  
State Primary Standard ◽  
Magnetic Flux Density ◽  
Constant Field

The results of works aimed at increasing the level of uniformity of measurements of the magnetic induction of a constant field – the basic value in the field of magnetic measurements. A set of equipment for reproducing a unit of magnetic induction of a constant field in the range of 1–25 mT was created and described. The inclusion of this complex in the State primary standard of units of magnetic induction, magnetic flux, magnetic moment and magnetic induction gradient GET 12-2011 will ensure the reproduction and direct transmission of the unit of permanent magnetic induction in the ranges of not only weak (10–3–1 mT), but medium (1–25 mT) and strong (0.025–1 T) magnetic fields. A quantum cesium magnetometer based on the resolved structure of cesium atoms was created to transmit the unit of magnetic induction to the region of medium fields. The procedure for calculating the frequency conversion coefficients to magnetic induction of the created quantum cesium magnetometer is described. The uncertainty budget for reproducing a unit of magnetic induction of a constant field using the created complex is estimated.

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