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QuantumATK => General Questions and Answers => Topic started by: Inaoton on March 19, 2017, 07:34

Title: Static dielectric constant and High Frequency dielectric constant
Post by: Inaoton on March 19, 2017, 07:34

Hello,
             An anisotropic material has three components of real and imaginary parts(x.y.z) of the dielectric tensor in Optical spectrum .
            1.  How can i measure the static dielectric constant of the anisotopric material?
            2. Similarly how can i measure the high frequency dielectric constant?
           

Title: Re: Static dielectric constant and High Frequency dielectric constant
Post by: Petr Khomyakov on March 19, 2017, 11:48

Do you mean how these can be experimentally measured? If so, you may google this kind of information, e.g., see https://www.google.dk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=measure+dielectric+constant&*.

Title: Re: Static dielectric constant and High Frequency dielectric constant
Post by: Jess Wellendorff on March 21, 2017, 13:40

or use OpticalSpectrum analysis in ATK to calculate it: http://docs.quantumwise.com/manuals/Types/OpticalSpectrum/OpticalSpectrum.html (http://docs.quantumwise.com/manuals/Types/OpticalSpectrum/OpticalSpectrum.html)

Title: Re: Static dielectric constant and High Frequency dielectric constant
Post by: goldrake on November 15, 2017, 17:27

Good Morning,

more in general, how to calcualte with QW the dielectric constant vs. frequency, from microwave to optics, of a material ?
For example, how to re-obtain the Kubo-Drude formula for monolayer graphene ?
Tx
Luca

Title: Re: Static dielectric constant and High Frequency dielectric constant
Post by: Petr Khomyakov on November 15, 2017, 21:25

You may use the Optical Spectrum analysis object, see https://docs.quantumwise.com/manuals/Types/OpticalSpectrum/OpticalSpectrum.html and
https://docs.quantumwise.com/tutorials/optical/optical.html.