- #1
grandmessage
- 7
- 0
Hello everyone,
a number of books and web articles says that the minimum field required is ≈[itex]10^7V/cm[/itex] for electrons field emission/tunneling from the surface of metals.
But fowler-nordheim formula shows that there is still considerable amount of field emission
current density (mA/cm2) even at lower fields of order [itex]10^4V/cm[/itex], for the same
tunneling barrier.
What is the truth..??
Any answers would be greatly appreciated!
a number of books and web articles says that the minimum field required is ≈[itex]10^7V/cm[/itex] for electrons field emission/tunneling from the surface of metals.
But fowler-nordheim formula shows that there is still considerable amount of field emission
current density (mA/cm2) even at lower fields of order [itex]10^4V/cm[/itex], for the same
tunneling barrier.
What is the truth..??
Any answers would be greatly appreciated!