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Topic: Effective mass

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	Effective mass in semiconductors
		The effective mass of these anisotropic minima is characterized by a longitudinal mass along the corresponding equivalent (100) direction and two transverse masses in the plane perpendicular to the longitudinal direction.
		for instance for a single band minimum described by a longitudinal mass and two transverse masses the effective mass for density of states calculations is the geometric mean of the three masses.
		The effective mass for conductivity calculation is the mass which is used in conduction related problems accounting for the detailed structure of the semiconductor.
	ece-www.colorado.edu /~bart/book/effmass.htm (730 words)

	Effective mass - Wikipedia, the free encyclopedia
		In solid state physics, a particle's effective mass is the mass it seems to carry in the semiclassical model of transport in a crystal.
		Effective mass, being generally dependent on direction (with respect to the crystal axes), is a tensor.
		Effective mass should not be confused with reduced mass, which is a concept from Newtonian mechanics.
	en.wikipedia.org /wiki/Effective_mass (676 words)

	Time dilation/length contraction
		The increase in effective mass with speed is given by the expression
		This increased effective mass is evident in cyclotrons and other accelerators where the speed approaches c.
		Upon being introduced to special relativity for the first time, it is easier to contemplate concepts like the speed of light as the speed limit of the universe by envisioning the mass as increasing to infinity at velocity c.
	hyperphysics.phy-astr.gsu.edu /hbase/relativ/tdil.html (431 words)

	Talk:Effective mass - Wikipedia, the free encyclopedia
		This article says that an electron hole in silicon has effective mass around 1.00me.
		This article uses the density of states effective mass, while the other article you mention just uses the heavy hole effective mass.
		Also, to my eye, the effective mass quoted for electrons in GaAs in this article is just plain wrong...
	en.wikipedia.org /wiki/Talk:Effective_mass (198 words)

	2.3.1 Effective Masses
		The decisive factor for the effective mass is thus the
		the radius of an inscribed circle is small); we thus expect the effective mass of the electrons to be smaller than the effective mass of the holes.
		However, if we know the the dispersion curves (either from involved calculations or from measurements), we can put a number to the effective masses and find that they are not too different from the real masses.
	www.tf.uni-kiel.de /matwis/amat/semi_en/kap_2/backbone/r2_3_1.html (1221 words)

	diyAudio Forums - effective mass (Site not responding. Last check: 2007-10-19)
		With the Ladegaard arm, the total mass of the arm assembly and the slider is your horizontal moving mass, and your vertical moving mass is more difficult to calculate.
		It is related to the distribution of mass, m, times (the distance to the vertical pivot, d, squared) - in practice it is dominated by two things: the mass of the counter weight and the mass of the cartridge.
		It represents the equivalent mass that would need to to be at the stylus location that, once in motion, would have the same opposition to a force applied to it.
	www.diyaudio.com /forums/showthread.php?postid=23964 (1486 words)

	Effective Advertising - Welcome To (Site not responding. Last check: 2007-10-19)
		Effective Advertising: How, radio advertising in the 30s, When, and Why Ads Work comprehensive book on advertising effectiveness, Understanding Effective Advertising reviews over 50 years.
		Effective ads propel economic growth - CNBC NFO poll Even as acclaimed advertising veteran and specialist in "Effective Advertising" - Prof John Philip reiterated that the effectiveness of advertising can be measured by scientific.
		The misconception some entrepreneurs have is effective advertising has to be a 30-second spot on the learn the nuts and bolts of cost-effective advertising for small businesses.
	www.top1marketing.com /news/effective-advertising.html (615 words)

	Effective mass at opensource encyclopedia (Site not responding. Last check: 2007-10-19)
		Effective mass is an important concept in semiconductor physics.
		It can be shown that electrons and holes in a crystal respond to an electric field almost as if they were free particles in a vacuum, but with a different mass.
		Effective mass is generally dependent on direction (with respect to the crystal axes), however for most calculations the various directions can be averaged out.
	www.wiki.tatet.com /Effective_mass.html (444 words)

	Effective Mass and Travel (Site not responding. Last check: 2007-10-19)
		To the degree to which normal modes can be described as a simple harmonic oscillator, the effective mass involved can be calculated.
		For a homonuclear diatomic, this is half the atomic mass; if one of the atoms is extremely massive, the mass is approximately that of the other atom.
		Therefore, given a knowledge of the force constant for the vibration, and the effective mass, the excursion distance (in mass weighted space) can readily be calculated.
	www.cachesoftware.com /mopac/Mopac2002manual/node77.html (96 words)

	Schrödinger equation for variable effective mass (Site not responding. Last check: 2007-10-19)
		Since the effective mass is a property of a bulk, it is not well defined in the neighborhood of a sharp material transition.
		One has to keep in mind that very close to the heterojunctions the effective mass Schrödinger equation provides a reasonable mathematical connection between the two regions, but the physical quantities are not necessarily well defined.
		The effective mass is the only quantity which must be known at the midpoints.
	www.ceg.uiuc.edu /tutorials/schro/html/node7.html (724 words)

	Effective Striking Mass (Site not responding. Last check: 2007-10-19)
		Whereas the above example used the actual mass of the ball and the bat, the mass of the bat may be larger due to Plagenhoef's concept of the effective striking mass.
		There does not seem to be any information available on whether the mass of the baseball bat is supplemented due to its connection to the rigid links of the athlete." I understand that if one was to simply throw the bat at the ball there is a collison in the classical sense.
		In addition, I understand that forces applied to the grip accelerate the bat into the oncoming pitch, however, at the moment of impact if one is "limp wristed" with the bat moving quickly the results of the collision is less effective than if the one is stiff wristed with the bat moving quantitatively slower.
	isb.ri.ccf.org /biomch-l/archives/biomch-l-1997-08/00090.html (224 words)

	Citebase - Effective mass in quantum effects of radiation pressure
		Effective mass in quantum effects of radiation pressure
		At low frequency this effective response is similar to a harmonic response with an effective mass smaller than the total mass of the mirror.
		For a plano-convex resonator the effective mass is related to the light spot size and becomes very small for small optical waists, thus enhancing the quantum effects of optomechanical coupling.
	www.citebase.org /cgi-bin/citations?id=oai:arXiv.org:quant-ph/9901057 (1219 words)

	Properties of Nitride Semiconductors:The Electron Effective Mass in GaN
		This effective mass value (m=0.22mo) lies within the previously reported values of m [see references 2-11 in Perlin's paper.] The effective mass value reported by Perlin et al.
		The Perlin's effective mass value may not be acceptable for the following reason: The best method used to determine the effective masses is the cyclotron resonance (CR) technique.
		Electron effective mass in GaN from Hall and IR reflectivity measurements by Piotr Perlin, (3/13/96).
	nsr.mij.mrs.org /discussions/properties/discuss9.html (575 words)

	effective_mass(float mass_sq[], float *field_values)
		As explained in section 6.3.2 the effective mass used for initial conditions and for calculating spectra is given in program units by
		As with the potential energy function the effective mass function accepts a pointer to an array of field values.
		The next part sets the square masses in terms of these values; these equations are the part of the function unique to each model.
	www.cita.utoronto.ca /~felder/latticeeasy/latticeeasydocs/node21.html (182 words)

	Properties of Nitride Semiconductors:Electron effective mass in GaN from Hall and IR reflectivity measurements (Site not responding. Last check: 2007-10-19)
		First the position and shape of the plasma edge weakly depend on the density of dislocation or on concentration of the deep states in the gap.
		It is very different from the shape of absorption edge (band to band transition) which is strongly influenced by the presence of deep states in the gap.
		The main source of error in this method could be presicion of determination of the free electron concentration from the Hall efect (because of for example not uniform flatness of the crystals) and uknown nonparabolicity of the conduction band.
	nsr.mij.mrs.org /discussions/properties/discuss11.html (645 words)

	POSITION-DEPENDENT EFFECTIVE MASS
		is the ``effective mass'' which characterizes the curvature of the dispersion relation.
		These introduce changes in the ``local band structure'' which must be incorporated into the effective mass equation (13.153) to obtain an accurate model of the quasiparticle dynamics in a heterostructure.
		In general, the value of the effective mass will also change across a heterojunction, and this requires a more careful treatment of the kinetic energy term.
	www.utdallas.edu /dept/ee/frensley/technical/opensyst/node34.html (679 words)

	Bodybuilding.com - Workout Of The Week - What Is The Most Effective Mass Building Tricep Workout?
		It is important to consider that if you do option 2 or 3, you will probably have to reduce the work done before you get to you triceps as this routine is designed to be done by itself, performing after chest and delt training may lead to over training.
		If you're lacking size and overall mass on the upper back of your arms, then you should prioritize your triceps in your training by simply devoting one training day out of the week to train the triceps.
		The problem with training the tricep muscles after a chest workout is that you cannot fully overload the triceps, as they have already been partially worked during the chest movements.
	www.bodybuilding.com /fun/wotw17.htm (7797 words)

	Structural dependence of effective mass...abstract
		The structural dependence of the effective mass and Luttinger parameters in semiconductor quantum wells
		It is shown that, in order to give agreement with the more rigorous microscopic approach of the pseudopotential method, structural dependent effective masses and Luttinger parameters must be invoked.
		It is shown that the electron, light- and heavy-hole effective masses tend towards twice their bulk values in the limit of narrow quantum wells.
	www.elec-eng.leeds.ac.uk /homes/ph/abs/59.html (149 words)

	Anomalous effective mass in MoS2
		, the oscillatory inter-band magneto-optic absorption has revealed a mass ratio of the order of 0.01.
		Theory is presented to show that this mass may be associated with the H-point of the Brillouin zone.
		Moreover, it is proposed that the origin of the mass is an instability of the equally-spaced layer arrangement giving rise to a distorted form with alternate layers displaced in the axial direction.
	stacks.iop.org /0022-3719/7/1247 (198 words)

	Effective mass theorems for nonlinear Schrödinger equations (Site not responding. Last check: 2007-10-19)
		Assuming well prepared initial data, the resulting effective dynamics is
		effective mass tensor depending on the initially chosen Bloch eigenvalue.
		The given results rigorously justify the use of the effective mass
	www.mat.univie.ac.at /~wittg/preprints/shadow.php?preprintnumber=75 (80 words)

	Condensed matter physics - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-19)
		In this context, condensed matter physicists research nanotechnology, i.e.
		the ability to mass produce atomic-scale machines, which was first publicly envisioned by Richard Feynman.
		Electronic properties - Band gap; Bloch wave; Conduction band; Effective mass; Electrical conduction; Electron hole; Valence band
	www.sciencedaily.com /encyclopedia/condensed_matter_physics (463 words)

	Impurity Effective Mass in Superfluid (ResearchIndex) (Site not responding. Last check: 2007-10-19)
		Abstract: Introduction A couple of the most interesting questions are to be mentioned within the problem of determining the impurity energy spectrum in superfluid 4 He, namely, the calculation of the impurity effective mass M and revealing the spectrum character in the region of wave vectors corresponding to the reverse interatom distance.
		Within the framework of the thermodynamic approach the effective mass of 3 He was originally determined on the basis of experimental data for heat capacity...
		@misc{ vakarchuk-impurity, author = "I.O. Vakarchuk and V.V. Babin and Ivan Franko", title = "Impurity Effective Mass in Superfluid", url = "citeseer.ist.psu.edu/vakarchuk98impurity.html" }
	citeseer.ist.psu.edu /305417.html (199 words)

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