What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

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25 February 2021 5,713 1 View

How to calculate Z (the number of molecules in a unit cell) for calculating theoretical density?

I am trying to calculate the theoretical density of my ceramics materials. I use the formula below to calculate the theoretical density: Theoretical density = (Molecular weight x No. of molecules...

24 February 2021 3,823 2 View

What is the reason film thickness increased?

what is the reason film thickness increased when increased doping concentrations give some reasons The measured film thickness is 156, 282, 394, 548 and 681 nm for 0, 1.5, 2.5, 3.5, and 4.5 wt....

17 February 2021 8,987 5 View

How can we determine the band gap of a composite material that is made up of a composition of direct and indirect band gap semiconductor materials?

I have a direct band gap material and an indirect band gap material. If I made a composite of both through physical mixing. Then how can I determine the band gap of such a material as the Tauc...

17 February 2021 8,104 4 View

Does anybody know a public dataset of drop landing or jump landing maneuvers?

Dear all, In our project we would like to test different control strategies during drop landing compared to jump landing. After an intensive search I could not find a public dataset of drop...

09 February 2021 7,093 4 View

Is there any publication about the effect of basketball and volleyball on body height?

Many people believe that some stretching sports with vertical jump such as basketball and volleyball can increase the body height. On the other hand, others do not agree with this argument. The...

02 February 2021 281 6 View

How doping in nano-particles with same valency affect it's crystal lattice structure?

When doping in case of semiconductor is concerned, we doped Si by trivalent or pentavalent impurity atoms to improve its electronic properties but in case of nano-particles, sometimes we doped...

31 January 2021 7,128 1 View

I am desigining UWB antenna with ecllipse shaped patch on HFSS.Why gain is coming negative ?

I am attaching my design and result of Gains.S11 parameter is less than -10dB from 3.1 to 9.8 Ghz.Z11 magnitude also lies between 40 -60 ohm for this range .Still gain is negative. Pls help

29 January 2021 4,334 3 View