Quantum Tunneling - The Mind-Bending Phenomenon behind STM

Quantum tunneling is a fundamental quantum mechanical phenomenon that occurs when a particle passes through a potential barrier that it classically shouldn't be able to pass through. In scanning tunneling microscopy (STM), quantum tunneling is used to image the surface of a sample with atomic resolution.

STM works by bringing a very sharp metal tip very close to the surface of a sample and applying a voltage between the tip and the sample. Because of the proximity of the tip to the sample, electrons can tunnel between the tip and the sample, which creates a measurable current.

The current that flows between the tip and the sample is extremely sensitive to the distance between the two, such that even small changes in the distance can cause large changes in the current. By monitoring the current as the tip is moved across the surface of the sample, STM can create an image of the surface topography with atomic resolution.

Quantum tunneling plays a critical role in STM because it enables electrons to pass through the small gap between the tip and the sample. The probability of tunneling depends exponentially on the distance between the tip and the sample, so the current between the two is extremely sensitive to changes in this distance.

Overall, STM relies on the principles of quantum mechanics, including quantum tunneling, to create detailed images of surfaces at the atomic level.

#quantummechanics #quantumphysics #quantumtunneling #stm

[apnizindagilogonkeliyeinsp]

I was today morning thinking about this topic relating the barrier as difficulties of life and the miracles are like quantum tunneling.

[Nikhil-ghqr]

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[manjunathkammar]

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[Sarcasmka]

Wow!!! Sir Aaj hi ae topic ki study ki hain...or kal exam hain Physics ke☺️

[sohanaiyappa]

so the tunelling current is directly proportional to the distance from the tip of STM and the surface and by measuring the tunelling current they get the distance and doing that repeatedly they are able to get a 3d map of the surface?

[abdullahhusain]

How fixed item have potential energy?
Please explain

[sovikdedebnath]

Earliest application was tunnel diodes

[sivateja]

But how any particle can turnel through the barrier that have kore then its energy?

[soumyaranjanprusty]

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