This topic contains a solution. Click here to go to the answer

Author Question: The Kronig-Penney model for electrons within a semiconductor utilizes all of these quantum ... (Read 66 times)

Chloeellawright

  • Hero Member
  • *****
  • Posts: 588

The Kronig-Penney model for electrons within a semiconductor utilizes all of these quantum mechanical constructs EXCEPT:


a. wave functions
 b. boundary conditions

c. tunneling
 d. finite potential wells
 e. discrete electron energy levels (within the lattice spaces)



Question 2

Which of the following does NOT represent a property of carbon nanotubes useful in nanotechnology application?
 
a. high electrical conductivity
  b. low thermal conductivity
  c. high tensile strength
  d. flexible under compression



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Carissamariew

  • Sr. Member
  • ****
  • Posts: 359
Answer to Question 1

For a semiconductor with an infinite lattice of potential wells, which the Kronig-Penney model assumes, the electron energy levels are no longer discrete but continuous. The model holds to a very good approximation, since even a relatively small order of magnitude of atoms (103) can make the levels nearly continuous.

Answer to Question 2

b.
This statement is not true. Carbon nanotubes have extremely high thermal conductivity, which shows that thermal and electrical conductivity are interconnected. Nanotubes have the ability to carry large currents and also carry away the heat associated with large currents, making the maximum current density they carry large enough to rival the critical current densities of some superconductors.





 

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Did you know?

Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

For a complete list of videos, visit our video library