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First perform a selfconsistent Hartree-Fock/HSE calculation using a conventional KPOINTS file.-) Copy the IBZKPT file to KPOINTS, and explicitely add all desired k-points along high-symmetry lines of the BZ that are needed for the bandstructure plot. Add the points at the end of the KPOINTS file, but set the weights of these added k-points to 0¡£
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y1ding

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jttjtl

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band structures using hybrid functionals have to be calculated the following way:
-) First perform a selfconsistent Hartree-Fock/HSE calculation using a conventional KPOINTS file.
-) Copy the IBZKPT file to KPOINTS, and explicitely add all desired k-points along high-symmetry lines of the BZ that are needed for the bandstructure plot. Add the points at the end of the KPOINTS file, but set the weights of these added k-points to 0.
-) Do not forget to set the number of k-points in KPOINTS correctly (to the number of the k-points used in the standard mesh PLUS the number of the k-points along the lines), such that all k-points are used for the calculations.
-) NKRED can not be used.
-) Perform a second VASP run:
It is recommended to use the Davidson algorithm, since it converges that eigen energies at the new k-points fastest. Since VASP terminates when the total energy is converged to a certain threshold, it is important to force VASP to do a minimum number of steps, so that the orbitals at the new k-points are fully converged (note: since their weight is zero, they do not contribute to the total energy).
This can be done using e.g.

ALGO = N ; NELMIN = 5 ! Davidson, minimum 5 scf-steps
IBRION = 1 ! Use simple charge mixer, since
Pulay might blow up

-) The KS-eigenvalues of the states along the high-symmetry lines are written in OUTCAR, EIGENVAL, vasprun.xml; please cut the k-points required for the bandstructure from one of these files and proceed as usual (using p4vasp or any other graphics tool you usually use to produce bandstructure-plots)

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9Â¥2010-10-20 19:01:58
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sunyang1988

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[ Last edited by sunyang1988 on 2010-10-19 at 20:29 ]
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error in IBZKPT_HF: two k-points are equivalent           
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3Â¥2010-10-20 10:11:24
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wusongz

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Originally posted by sunyang1988 at 2010-10-19 19:36:04:
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sunyang1988

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jttjtl(½ð±Ò+2): 2010-10-20 11:22:36
zzy870720z(½ð±Ò+1): ллÌáʾ 2011-09-03 17:00:36
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Originally posted by jttjtl at 2010-10-20 10:11:24:
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error in IBZKP ...

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jttjtl

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Originally posted by sunyang1988 at 2010-10-20 10:51:36:

ÄãÊDz»ÊÇ×öÍê×ÔÇ¢¼ÆËãÈ»ºó¾²Ì¬¼ÆËãÄÜ´øÄØ£¬INCARÐÞ¸ÄÁËû£¿

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HFSCREEN = 0.207
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sunyang1988

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bingmou(½ð±Ò+2):¸ÐлÄãµÄ»ý¼«²ÎÓ룬ÓÐÎÞÐËȤ¼¯Öиø½²½²VASPÖÐHSE03¼ÆËãµÄ¹ý³ÌÄØ£¿Ð»Ð» 2010-10-20 13:10:03
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Originally posted by jttjtl at 2010-10-20 11:21:20:


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NELM = 100 ...

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