Recent content by condorino

Try with Optical Detection of Surface States in Ge Phys. Rev. 144, 749–751 (1966)

Try with heterostructures: InAs-InP for example... There's a book of Sneider Liu very useful... It's about Q.W.I.P.s find them on the internet.

I'm working with intraband transition and I think that you are looking for 100-200 meV transition. I (the group in which I'm employed) reach this range with intersubband transitions. If you are looking for transition from valence to conduction band, you have to find a very low-bandgap...

Great! That Helps a Lot! Yes you are right... the problem is divided in two parts: 1- changing the (x,y) -orthogonal plate- problem in the (X,Y) -tilted one. That seems to have a result in my previous post. 2- describing the problem in a cylindrical coordinate system instead of cartesian...

Because you will need an infinite energy... and there's no "enough" energy that is infinite! The point is that as the speed of your wheel (or anything else) approaches C, to bring this speed to C you will need E->infinite. So, if you are a genius with a lot of money buy your wheel or create...

\frac{A\, \cos\!\left(\frac{\pi}{6} + \arctan\!\left(\frac{\sqrt{3}\, X}{X - 10}\right)\right)\, \sqrt{\frac{3\, X^2}{4\, {\left(\frac{X}{2} - 5\right)}^2} + 1}}{B\, \mathrm{e}^{\frac{Y^2}{50}}\, \mathrm{e}^{\frac{3\, X^2}{8\, {\left(\frac{X}{2} - 5\right)}^2}}}

Well, that's what I ended up with... It's demanding translating it in TeX form, and, by the way, does somebody know how to translate a MATLAB equation in a LaTeX one? I started with G(x,y) (lower case xy) and assume a gaussian distribution in both direction. Particles are generated by a...

Hi! Maybe I come to a solution... The distribution is skewed according to the tilt angle, and I have found between x->x', y=y' (where ' means "tilted world")... Than with this geometrical relation I calculate G(x') supposing dxG(x)=dx'G(x'). Here I understand that there's a big...

But I have Density(x,y) = G(x)*g(y), where G and g are two normal distributions with equal sigma and centered in (0,0)... then the correlation matrix is diagonal so why I can't say that I have a normal distribution on the radius? Then I've tried to answer by myself and found that...

Hi all, I'm considering a problem of a bunch of particles (say electrons) arriving on a plate. If the plate is orthogonal to the direction of motion of the particles their distribution (on the plate) is a gaussian distribution centered in a point (x,y) of the plate with standard deviation...

Thank you all! I've looked for Krytron, Ignitron, ****tron. They all have the same problem as the Thyratron: very short life (10^7 commutations). @yungman: yes, a series of switches is useless!... You have obtained a 5kV commutation with 1kV switches, now I have a question for you: which...

Band Gaps do not occur according to a theory. It is the band structure (that has a gap only for semiconductors and insulators) that appears any time atoms are arranged in a periodic fashion to form a lattice. Bloch theory only says that for a definite K value, an electron that is in a band, has...

Hi all, I'm in a big trouble finding a switch that discharges a capacitor with 20kV on it. My circuit requires to do this very qwickly (tens of nanoseconds), but I cannot use a single switch because the only existing one that can allow this voltage is a Thyratron, and I don't want to use...

Hi all! I'm reading a paper by Allman et al. in which is described a neutron interferometer (like a Mach-Zender one). The neutron beam (monochromatic E=14meV ) is divided in two coherent beams (transmitted and reflected) using Bragg diffraction. From this discussion I understand that the...

Of course, higher energy orbitals are less bounded to the nucleus, they have big boxes and are slower. Sorry.