Question

Suppose that an STM scans a surface at a distance of a = 1.500 nm. Take the height of the potential energy barrier to be U0 - E = 1.70 eV. If the distance between the surface and the STM tip decreases by 1.6% estimate the percentage change in the tunneling current. (Here is how you should enter your answer: if the change is 5% write 5.00 and if 20.7% write 20.7 and so on)

          Suppose that an STM scans a surface at a distance of a = 1.500 nm.
Take the height of the potential energy barrier to be U0 - E = 1.70 eV.
If the distance between the surface and the STM tip decreases by 1.6%
estimate the percentage change in the tunneling current.
(Here is how you should enter your answer:
if the change is 5% write 5.00 and if 20.7% write 20.7 and so on)

Suppose that an STM scans a surface at a distance of a = 1.500 nm.
Take the height of the potential energy barrier to be U0 - E = 1.70 eV.
If the distance between the surface and the STM tip decreases by 1.6%
estimate the percentage change in the tunneling current.
(Here is how you should enter your answer:
if the change is 5% write 5.00 and if 20.7% write 20.7 and so on)

Added by Erin F.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

04/10/2022

Step 1

6%** Given: Initial distance, a = 1.5 nm Percentage decrease = 1.6% New distance = Initial distance - (Percentage decrease * Initial distance) New distance = 1.5 - (0.016 * 1.5) = 1.5 - 0.024 = 1.476 nm ** Show more…

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Suppose that an STM scans a surface at a distance of a = 1.500 nm. Take the height of the potential energy barrier to be U0 - E = 1.70 eV. If the distance between the surface and the STM tip decreases by 1.6% estimate the percentage change in the tunneling current. (Here is how you should enter your answer: if the change is 5% write 5.00 and if 20.7% write 20.7 and so on)