Dear Developers,
As I understand due to the used approximation for 2-dimensional materials for which unitless epsilon values are in the order of 1e-6 the results are not comparable with bulk materials. Is there any transformation to compare my results with bulk materials?
Best regards.
Zafer
The imaginary part of the dielectric function
Moderators: Davide Sangalli, andrea.ferretti, myrta gruning, andrea marini, Daniele Varsano, Conor Hogan
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Zafer Kandemir
- Posts: 40
- Joined: Wed May 06, 2020 9:43 am
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The imaginary part of the dielectric function
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Dr. Zafer Kandemir
Postdoctoral Researcher
Department of Mechatranics Engineering, Sabanci University
Istanbul, Turkey
Postdoctoral Researcher
Department of Mechatranics Engineering, Sabanci University
Istanbul, Turkey
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Daniele Varsano
- Posts: 3816
- Joined: Tue Mar 17, 2009 2:23 pm
- Contact:
Re: The imaginary part of the dielectric function
Dear Zafer,
when dealing with 2D structure using cutoff coulomb potential the code also provides the polarisability alpha as output. This is the quantity you should look at.
Best,
Daniele
when dealing with 2D structure using cutoff coulomb potential the code also provides the polarisability alpha as output. This is the quantity you should look at.
Best,
Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/
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Zafer Kandemir
- Posts: 40
- Joined: Wed May 06, 2020 9:43 am
- Contact:
Re: The imaginary part of the dielectric function
Dear Daniele,
Is it possible to obtain the absorption coefficient or reflectivity of a metal by using alpha?
Thank you very much for your generous help.
Best regards.
Zafer
Is it possible to obtain the absorption coefficient or reflectivity of a metal by using alpha?
Thank you very much for your generous help.
Best regards.
Zafer
Dr. Zafer Kandemir
Postdoctoral Researcher
Department of Mechatranics Engineering, Sabanci University
Istanbul, Turkey
Postdoctoral Researcher
Department of Mechatranics Engineering, Sabanci University
Istanbul, Turkey
-
Daniele Varsano
- Posts: 3816
- Joined: Tue Mar 17, 2009 2:23 pm
- Contact:
Re: The imaginary part of the dielectric function
Dear Zafer,
I would say yes, alpha is defined as:
alpha=-X/q^2 where X is the response function.
Best,
Daniele
I would say yes, alpha is defined as:
alpha=-X/q^2 where X is the response function.
Best,
Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/