If you want to "have an idea", then you should read the related literature...

   Variable:       vdw_corr

   Type:           CHARACTER
   Default:        'none'
   See:            london_s6, london_rcut, london_c6, london_rvdw,
dftd3_version, dftd3_threebody, ts_vdw_econv_thr, ts_vdw_isolated, xdm_a1, xdm_a2
   Description:
                   Type of Van der Waals correction. Allowed values:

                   'grimme-d2', 'Grimme-D2', 'DFT-D', 'dft-d' :
                        Semiempirical Grimme's DFT-D2. Optional variables:
                        "london_s6", "london_rcut", "london_c6", "london_rvdw"
S. Grimme, J. Comp. Chem. 27, 1787 (2006), doi:10.1002/jcc.20495 V. Barone et al., J. Comp. Chem. 30, 934 (2009), doi:10.1002/jcc.21112

                   'grimme-d3', 'Grimme-D3', 'DFT-D3', 'dft-d3'  :
                        Semiempirical Grimme's DFT-D3. Optional variables:
                        "dftd3_version", "dftd3_threebody"
S. Grimme et al, J. Chem. Phys 132, 154104 (2010), doi:10.1002/jcc.20495

                   'TS', 'ts', 'ts-vdw', 'ts-vdW', 'tkatchenko-scheffler' :
Tkatchenko-Scheffler dispersion corrections with first-principle derived
                        C6 coefficients.
Optional variables: "ts_vdw_econv_thr", "ts_vdw_isolated" See A. Tkatchenko and M. Scheffler, PRL 102, 073005 (2009).

                   'XDM', 'xdm' :
Exchange-hole dipole-moment model. Optional variables: "xdm_a1", "xdm_a2" A. D. Becke et al., J. Chem. Phys. 127, 154108 (2007), doi:10.1063/1.2795701 A. Otero de la Roza et al., J. Chem. Phys. 136, 174109 (2012),
                        doi:10.1063/1.4705760


HTH
Giuseppe


Quoting "Hemant Verma (M19PH015)" <verma...@iitj.ac.in>:

Dear QE users

I am new at QE. Can you please give me an idea about DFT-D3 calculation?
Thank you in advance.

Regards
Hemant

On Mon, Feb 1, 2021 at 2:56 PM 柯莫 <rajup...@g.ncu.edu.tw> wrote:

Hello Everyone, Good Afternoon,
I want to calculate  vdw potential seen by electrons in monolayer 1 tmdc
due to charge density on the 2nd layer and vice versa. For this
non-local-correlation contribution to the potential points on the grid on
the surface is needed.  I check in the Quantum espresso VDW-D3 directory
there and I see only the improvement in energy not potential due to vdw
interaction.  Could you help me to calculate the vdw  potential and related
subroutine.  Looking forward to your help. Thank you!

--
Raj Kumar Paudel (Raj)
Graduate Student

Research Center for Applied Sciences,
516B Room, 5F, Interdisciplinary Research Building for Science and
Technology, Academia Sinica,
128 Academia Road, Section 2, Nankang, Taipei 115, Taiwan, R.O.C.

Cell: +886-966-440-750
Office: +886-2-2787-3196
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GIUSEPPE MATTIOLI
CNR - ISTITUTO DI STRUTTURA DELLA MATERIA
Via Salaria Km 29,300 - C.P. 10
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Mob (*preferred*) +39 373 7305625
Tel + 39 06 90672342 - Fax +39 06 90672316
E-mail: <giuseppe.matti...@ism.cnr.it>

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