Why does Bismuth have a anomalously high Hall value?

In summary, Bismuth's unique electronic structure, large atomic radius, and low electronegativity contribute to its high Hall value, which is significantly higher than most other elements on the periodic table. This high Hall value can be manipulated through techniques such as doping and external magnetic fields, and has practical applications in electronic and magnetic devices.
  • #1
rwooduk
762
59
Bismuth has a hall coefficient 1000 times larger than its free electron value. given that Bi has a distorted cubic structure with 2 atoms per unit cell, suggest a reason for the high hall value.

Any ideas appreciated. Thanks.
 
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  • #2
For the benefit of the OP and anyone else, Bismuth is not a monovalent element and so the simple formulas for the Hall effect based on the free-electron model and applicable to monovalent conductors are not valid for multi-valent conductors. Quantum mechanics gives approximately correct answers.
 

1. Why is Bismuth's Hall value so high compared to other elements?

Bismuth has a unique electronic structure that results in a high density of charge carriers, which contributes to its high Hall value.

2. How does Bismuth's Hall value compare to other elements on the periodic table?

Bismuth's Hall value is significantly higher than most other elements, making it a unique outlier on the periodic table.

3. Is Bismuth's high Hall value a result of its atomic structure?

Yes, Bismuth's atomic structure, specifically its large atomic radius and low electronegativity, contribute to its high Hall value.

4. Can Bismuth's Hall value be controlled or manipulated?

Yes, Bismuth's Hall value can be manipulated by altering its electronic structure through techniques such as doping or applying external magnetic fields.

5. Are there any practical applications for Bismuth's anomalously high Hall value?

Yes, Bismuth's high Hall value makes it useful for various electronic and magnetic applications, such as in thermoelectric devices and magnetic sensors.

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