Metal Contact Effect on 1-D particle in a box quantum well

In summary, when an electrical contact is made onto a quantum well and an external electric field is applied, the energy levels of electrons and holes will shift slightly. This will affect the optical properties of the material, specifically the exciton absorption which may shift to lower energies. The details of these effects will vary depending on the material system. If interested in a specific material, one can search for articles on the "quantum confined Stark effect" with that material in the title. Otherwise, the standard reference for this effect is D.A.B. Miller et al.'s 1984 paper on "Band-Edge Electroabsorption in Quantum Well Structures".
  • #1
theanser
2
0
Dear All,

When an electrical contact is made onto the quantum well, how would the energy states be affected
?
 
Physics news on Phys.org
  • #2
If you use the contact to apply an external electric field (which I suppose is your intention) the energy levels of electrons and holes will shift slightly. If you are interested in optical properties, you will typically find that the exciton absorption is still resolvable and shifts to lower energies. Details will of course depend strongly on your material system.

If you are interested in some particular material look for any article containing "quantum confined Stark effect" and your choice of system in the title. Otherwise the standard reference on the quantum confined Stark effect is D.A.B. Miller et al., "Band-Edge Electroabsorption in Quantum Well Structures: The Quantum-Confined Stark Effect", Phys. Rev. Lett. 53, 2173–2176 (1984).
 
  • #3
Cthugha said:
If you use the contact to apply an external electric field (which I suppose is your intention) the energy levels of electrons and holes will shift slightly. If you are interested in optical properties, you will typically find that the exciton absorption is still resolvable and shifts to lower energies. Details will of course depend strongly on your material system.

If you are interested in some particular material look for any article containing "quantum confined Stark effect" and your choice of system in the title. Otherwise the standard reference on the quantum confined Stark effect is D.A.B. Miller et al., "Band-Edge Electroabsorption in Quantum Well Structures: The Quantum-Confined Stark Effect", Phys. Rev. Lett. 53, 2173–2176 (1984).

Thanks a lot :)
 

1. What is the "Metal Contact Effect" on a 1-D particle in a box quantum well?

The "Metal Contact Effect" refers to the influence that metal contacts have on the behavior of a 1-D particle in a box quantum well. This effect is due to the interaction between the electrons in the metal and the confined electrons in the quantum well, which can significantly alter the electronic properties of the system.

2. How does the metal contact affect the energy levels in a 1-D particle in a box quantum well?

The presence of metal contacts can cause a shift in the energy levels of a 1-D particle in a box quantum well. This is because the metal contacts introduce additional energy states that can interact with the confined electrons in the well, leading to a change in the overall energy levels of the system.

3. What is the impact of metal contacts on the electron density in a 1-D particle in a box quantum well?

The metal contacts can affect the electron density in a 1-D particle in a box quantum well by altering the confinement potential and changing the distribution of electrons. This can result in a redistribution of electron density within the well, which can have a significant impact on the electronic properties of the system.

4. Can the metal contact effect be controlled or manipulated in a 1-D particle in a box quantum well?

Yes, the metal contact effect can be controlled and manipulated in a 1-D particle in a box quantum well. This can be achieved by varying the material, size, and geometry of the metal contacts, as well as the properties of the quantum well. By carefully designing these parameters, the metal contact effect can be optimized and tailored for specific applications.

5. How does the metal contact effect influence the transport properties of a 1-D particle in a box quantum well?

The metal contact effect can have a significant impact on the transport properties of a 1-D particle in a box quantum well. This is because the presence of metal contacts can alter the scattering of electrons and modify the electron density within the well, leading to changes in conductivity, mobility, and other transport properties of the system.

Similar threads

Replies
42
Views
1K
  • Quantum Physics
Replies
4
Views
890
Replies
3
Views
1K
  • Quantum Physics
2
Replies
36
Views
1K
  • Quantum Physics
Replies
12
Views
1K
  • Quantum Physics
Replies
2
Views
839
  • Quantum Physics
Replies
3
Views
718
  • Quantum Physics
Replies
7
Views
2K
  • Quantum Physics
Replies
13
Views
520
Back
Top