Dielectric confinement effect

In summary, Dielectric confinement effect is the reduction of the dielectric constant in a semiconductor by depositing it on a high or low dielectric constant substrate. This phenomenon was first described in a 1979 paper by Keldysh and has since been studied extensively. For more information, you can refer to the original paper by Keldysh or a presentation by Tamar Tchelidze.
  • #1
pangru
15
2
What is Dielectric confinement effect?. or could you advise me literature about this?

Thank you.
 
  • #3
dielectric constant (ε) of semiconductor can be changed by deposition on high (or low) ε substrate.
==>
Dielectric confinement is effective reduction of the dielectric constant due to the penetration of electric field into barrier medium with a small dielectric constant.

for further inf.
original paper:
Keldysh, L.V.: Pis’ma Zh. Eksp. Teor. Fiz. 29, 716 (1979). JETPLett. 29, 658, 1979

and very nice prezentation:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCUQFjAAahUKEwiklsTR54jIAhWp73IKHeINDEI&url=http://collaborations.fz-juelich.de/ikp/cgswhp/cgswhp12/program/files_batumi/16-08-2012/Parallel_Session_7/2_Tamar.Tchelidze.ppt&usg=AFQjCNHBi1gwjjvLkzp4TuMIJN5PGTRu1A&sig2=u-8V63Irbv-KskTh-nPLlw
 

1. What is the dielectric confinement effect?

The dielectric confinement effect is a phenomenon in which the properties of a material are changed when it is confined to a small space. This effect is caused by the interaction between the material and its surrounding dielectric medium, which leads to a modification in the electronic structure and behavior of the material.

2. How does the dielectric confinement effect occur?

The dielectric confinement effect occurs when the size of a material becomes comparable to the wavelength of the electromagnetic radiation surrounding it. This results in a change in the energy levels and quantum behavior of the confined material, leading to altered properties.

3. What are some examples of the dielectric confinement effect?

One example of the dielectric confinement effect is the quantum confinement of electrons in semiconductor nanoparticles, which results in unique optical and electronic properties. Another example is the confinement of molecules in nanoscale cavities, which can alter their reactivity and stability.

4. What are the applications of the dielectric confinement effect?

The dielectric confinement effect has numerous applications in fields such as nanotechnology, materials science, and electronics. It is used to create novel materials with enhanced properties, such as increased conductivity or improved catalytic activity. It also plays a crucial role in the development of quantum computing and photovoltaic devices.

5. What are the challenges in studying the dielectric confinement effect?

One of the main challenges in studying the dielectric confinement effect is the difficulty in controlling and characterizing the confined materials at the nanoscale. The effects of confinement can be highly sensitive to factors such as size, shape, and surrounding environment, making it challenging to replicate and compare results. Additionally, the theoretical understanding of this phenomenon is still evolving, requiring further research and development.

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