[Wien] Calculation about the effect of external magnetic field

[Gavin Abo]

You did Dr. Pieper's exercise [ 
http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg11090.html 
]?

For example:

muB = ~5.7884*10^-5 eV/T [ http://en.wikipedia.org/wiki/Bohr_magneton ]

muB*Bext = (5.7884*10^-5 eV/T)*(10 T) = 5.7884*10^-4 eV

Likely the point is, say you plot DOS with an energy range of -5 to 5 eV 
with 1 eV major increments.  Probably, you are not going to see any 
change in the DOS plot with a 10 T field.  muB*Bext would likely need to 
be on the order of about 0.1 eV (corresponding to Bext = ~1728 T) to see 
any change with that energy range scale.  If on the other hand the plot 
of your DOS was say plotted with an energy range of -10*10^-3 eV to 
10*10^-3 eV with 1*10^-3 eV increments, then the change with a 10 T 
field would probably be noticeable (unless it is overwhelmed by noise in 
the numerical calculation [ 
http://www.mail-archive.com/wien%40zeus.theochem.tuwien.ac.at/msg09466.html 
]).

So you need to either change the energy scale of your plots or increase 
the magnetic field value to see the effects.

On 9/3/2014 7:31 PM, ??? wrote:
> Dear Dr. Martin Pieper,
>     Thank you for your help! For my calculation, I have ever tried 
> different values of magnetic field ( 0.1 T, 1T, and 10T) and all of 
> them have no effects on the electronic structures such as DOS, or 
> bandstructures e.g. So you mean I should try a even larger magnetic 
> field ?
>    Thank you again!
> Best Regards,
> Yanli
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