Recent content by sinayu71

Hi guys: Why people consider the plasmon ocsilation as a longitudinal wave? Thank you for your answer. sinayu

in the solid state physics book, when determine the plasma ocillation, k =0 is chosed in the dielectric funtion. However, the w=0 is chosed when discuss the potential screening. Can someone explain it? thank you :shy:

Hi guys: Could someone kindly explain the relation between dielectric funciton (e) and frequency, wavevetor? What is the condition for wavevector e(k=0, w), e(k, w=0) and why? Thanks a lot :smile:

For metals, work function is defined as the energy gap from fermi level to the vacuum level and electrons can escape from material if they have a certain mount of kinetic energy that is larger than the work function. But, how can we define the work function for the semiconductor or it is totally...

Hi Modey 3: thank you for the answer. For hole transport semiconductors, is that correct to say free holes traveling at interface will be easily trapped in the area with relatively higher workfunction ( also shows a relatively higher surface potential)?

:rolleyes: surface potential is defined as the electrostatic potential energy of a surface confined charges. By Kelvin probe microscope, the the surface potential can be measured and the variation from negative to positive can be seen at different region on the interface. My question is: is it...

thank you very much. It is helpful indeed!

Well, I am not in a high level of education especially in physics. Like you say, I may find it in my lecture note, so, it won't be so hard for you just make a few lines to tell me the definition of it. Particularly, I am curious to know that how do you interpret the chemical potential in the...

can someone simply describe the definition of the chemical potential?