Which outcome occurs when a scanning tunneling microscope (STM) tip is brought extremely close to a sample surface?

💡 Explanation

When the STM tip is close to the surface, electrons tunnel across the gap because of their wave-like nature, even through the classically forbidden region, resulting in a measurable tunneling current dependent on the tip-sample distance. Therefore atomic-scale imaging is enabled by this tunneling, rather than contact, interference, or discharge that require different physical mechanisms.

• Which outcome occurs when parallel coherent light passes through double slits?
• Which outcome results when rapid depressurization initiates cavitation in liquid nitrogen?
• Which change in outcome results when nitrogen atoms are substituted into a silicon lattice?
• Which phenomenon limits data transfer in fiber optic cables undergoing tight bends?
• Which outcome results when electrons in a scanning tunneling microscope encounter a non-conducting surface?
• Which risk increases when manipulating wave functions modelling small semiconductors?