Schottky Barrier: Understand Electron Movement

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The Schottky barrier is crucial for understanding electron movement between n-type semiconductors and metals. When electrons migrate from the semiconductor to the metal, a depletion region forms, creating a potential difference. For electrons to move from the metal to the semiconductor, they must overcome the Schottky barrier, which is often referred to as a potential barrier. This terminology can be confusing, as both terms describe the energy threshold that electrons must surpass. Clarifying this distinction helps in grasping the underlying physics of Schottky barrier diodes.
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Schottky barrier ! ?

hi all

something i can't understand in the schottky barrier diode
i know that when electrons move from semiconductor(n type) to metal a depletion region appears in the n side so potentail difference is created
so for electrons to move from S.c to metal they need to overcome this potential

the question is:
why the electrons to move from metal to sc ther have to overcome the barrier not the potential

i really have a problem to understand the meaning of barrier
 
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They refer to the same thing. In fact, some authors refer to a "potential barrier."
 

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