[Pw_forum] the difference between the low- and high-frequency dielectric constants

[Suza W]

Dear All,

The Eqn. 11 of PRL 89, 157602 (2002) gives :

Square_of_Frequency =  (4 x pi x  Z* x Z*) / (volume x mu x
change_in_epsilon )
                             =  (4 x pi x 1.96 x 1.96 ) / ( 126 x 9.648 x
5.09 )  [values in atomic units]
                             =  0.0077974023909789656

Here, I can not obtain the "Square_of_Frequency" for MgO in atomic unit.
Am I missing something here?

Thanks in advance for your time and reply.

Regards,
Suza W.
Magnetism and Magnetic Materials Division
National Laboratory for Material Science
Institute of Metal Research, Chinese Academy of Sciences.


On Fri, Jan 10, 2014 at 4:43 PM, Suza W <suza.rri at gmail.com> wrote:

> Dear All,
>
> Using Eqn. 11 of PRL 89, 157602 (2002), the authors had got the value
> 5.09.
> Could you anyone please show me how? Feeding volume, mass and frequency in
> atomic units, I am unable to get that value if Z* is 1.96. Thanks in
> advance for your kind kelp.
>
> Regards,
> Suza W.
> Magnetism and Magnetic Materials Division
> National Laboratory for Material Science
> Institute of Metal Research, Chinese Academy of Sciences.
>
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