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wuli8ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)
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¡¾ÇóÖú¡¿band structures using hybrid functionals µÄKpointsÎÊÌâ
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http://cms.mpi.univie.ac.at/vasp-forum/forum_viewtopic.php?4.6633.10 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) Note: A Hartee-Fock calculation can NOT be continued from an existing CHGCAR file, since the non-local exchange is not determined by the charge density but by the density matrix and/or the KS-orbitals. ÒÔÉÏÊǹٷ½¸ø³öµÄ½âÊÍ¡£ ÎÒµÄÎÊÌâÊÇ£º 1¡¢-) 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. °´ÕÕÕâÑùµÄ·½·¨²úÉúµÄKpointsÔËÐкóÌáʾKpoints´íÎ󣬲»ÄܶÁÈ¡¡£ 2¡¢ÕâÒ»¾ä²»ÖªËùÔÆ£º(to the number of the k-points used in the standard mesh PLUS the number of the k-points along the lines), ûÓÐÀí½âÔõô»ØÊ£¿ ÇëÎÊËÓÃhseµÄ·½·¨¼ÆËã¹ýÄÜ´ø½á¹¹£¬ÇëshowÒ»ÏÂÏÂÄãµÄKpoints¡£ лл¡£ [ Last edited by wuli8 on 2010-12-1 at 21:04 ] |
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zzy870720z(½ð±Ò+2):ллָ½Ì 2010-12-04 21:36:29
wuli8(½ð±Ò+100):¸Ðл¡£ÎÒÔÙÊÔÒ»ÊÔ 2010-12-04 22:51:40
zzy870720z(½ð±Ò+2):ллָ½Ì 2010-12-04 21:36:29
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Automatically generated mesh 57 Reciprocal lattice 0.000000 0.000000 0.000000 1.000000 0.333333 0.000000 0.000000 1.000000 -0.333333 0.000000 0.000000 1.000000 0.000000 0.333333 0.000000 1.000000 0.333333 0.333333 0.000000 1.000000 -0.333333 0.333333 0.000000 1.000000 0.000000 -0.333333 0.000000 1.000000 0.333333 -0.333333 0.000000 1.000000 -0.333333 -0.333333 0.000000 1.000000 0.000000 0.000000 0.333333 1.000000 0.333333 0.000000 0.333333 1.000000 -0.333333 0.000000 0.333333 1.000000 0.000000 0.333333 0.333333 1.000000 0.333333 0.333333 0.333333 1.000000 -0.333333 0.333333 0.333333 1.000000 0.000000 -0.333333 0.333333 1.000000 0.333333 -0.333333 0.333333 1.000000 -0.333333 -0.333333 0.333333 1.000000 0.000000 0.000000 -0.333333 1.000000 0.333333 0.000000 -0.333333 1.000000 -0.333333 0.000000 -0.333333 1.000000 0.000000 0.333333 -0.333333 1.000000 0.333333 0.333333 -0.333333 1.000000 -0.333333 0.333333 -0.333333 1.000000 0.000000 -0.333333 -0.333333 1.000000 0.333333 -0.333333 -0.333333 1.000000 -0.333333 -0.333333 -0.333333 1.000000 0.00000000 0.00000000 0.50000000 0 0.00000000 0.00000000 0.44444444 0 0.00000000 0.00000000 0.38888889 0 0.00000000 0.00000000 0.33333333 0 0.00000000 0.00000000 0.27777778 0 0.00000000 0.00000000 0.22222222 0 0.00000000 0.00000000 0.16666667 0 0.00000000 0.00000000 0.11111111 0 0.00000000 0.00000000 0.05555556 0 0.00000000 0.00000000 0.00000000 0 0.00000000 0.00000000 0.00000000 0 0.05555556 0.05555556 0.00000000 0 0.11111111 0.11111111 0.00000000 0 0.16666667 0.16666667 0.00000000 0 0.22222222 0.22222222 0.00000000 0 0.27777778 0.27777778 0.00000000 0 0.33333333 0.33333333 0.00000000 0 0.38888889 0.38888889 0.00000000 0 0.44444444 0.44444444 0.00000000 0 0.50000000 0.50000000 0.00000000 0 0.50000000 0.50000000 0.00000000 0 0.50000000 0.50000000 0.05555556 0 0.50000000 0.50000000 0.11111111 0 0.50000000 0.50000000 0.16666667 0 0.50000000 0.50000000 0.22222222 0 0.50000000 0.50000000 0.27777778 0 0.50000000 0.50000000 0.33333333 0 0.50000000 0.50000000 0.38888889 0 0.50000000 0.50000000 0.44444444 0 0.50000000 0.50000000 0.50000000 0 Àý×Ó£¬Éϰ벿·ÖÊÇMonkhorst Pack²úÉúµÄKµã£¬ÏÂÃæÊǸ߶ԳƵÄKµã£¬µÚ¶þÐÐ×ÜKµãµÄÊýÄ¿ÊÇÁ½²¿·ÖµÄ×ܺͣ¬»ÄÜ´øµÄʱºòֻȡÏÂÃæ¸ß¶Ô³Æ²¿·ÖµÄ±¾Õ÷Öµ¼´¿É |
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wuli8
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5Â¥2011-03-11 00:08:02
wuli8
ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)
- 1STÇ¿Ìû: 2
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6Â¥2011-03-11 00:08:47
7Â¥2011-03-14 02:37:00
wuli8
ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)
- 1STÇ¿Ìû: 2
- Ó¦Öú: 35 (СѧÉú)
- ¹ó±ö: 12.924
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ÀÏÊÇÓÐÕâÑùµÄÌáʾ£º | | | W W AA RRRRR N N II N N GGGG !!! | | W W A A R R NN N II NN N G G !!! | | W W A A R R N N N II N N N G !!! | | W WW W AAAAAA RRRRR N N N II N N N G GGG ! | | WW WW A A R R N NN II N NN G G | | W W A A R R N N II N N GGGG !!! | | | | Your generating k-point grid is not commensurate to the symmetry | | of the lattice. This can cause slow convergence with respect | | to k-points for HF type calculations | | suggested SOLUTIONS: | | ) if not already the case, use automatic k-point generation | | ) shift your grid to Gamma (G) (e.g. required for hex or fcc lattice) | |
8Â¥2011-03-14 20:18:40
wuli8
ÈÙÓþ°æÖ÷ (ÖªÃû×÷¼Ò)
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9Â¥2011-03-14 20:22:26
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һ¥µÄÄǸö¹Ù·½»Ø¸´ÎÒÓÐÁ½µã²»Ì«Ã÷°×¡£ 1£©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, Õâ¸öÊÇ˵°ÑÎÒÃÇÏëÒª¼ÆËãµÄÑØ¸ß¶Ô³Æ·½ÏòµÄKµã×Ô¼º¼Óµ½KPOINTSµÄĩβ²¿·Ö£¬ÎÊÌâÊÇ×Ô¼º¼ÆËãÕâЩKµãµÄ×ø±êÊÇÒ»¼þºÜÂé·³µÄÊÂÇ飬ÏñÊÇÓеãÄÜ´ø¼ÆËã¿ÉÄÜÐèÒª¼ÆËã°Ë¾ÅÊ®¸öKµã£¬ÕâÒªÊÇ×Ô¼ºÒ»¸öÒ»¸öËã×ø±ê£¬ÄǿɷѾ¢ÁË¡£ÎÒÃÇÖ®ËùÒÔÔÚVASP5.2֮ǰµÄ°æ±¾ÖÐʹÓõÄKPOINTSÎļþÖÐʹÓÃLine-modeģʽ£¬¾ÍÊÇÒòΪvasp¿ÉÒÔ¸ù¾ÝÎÒÃǸø³öµÄ¸ß¶Ô³Æµã£¬×ÔÐÐËã³öÕâЩKµãµÄ×ø±ê¡£ ËùÒÔ²»ÖªµÀÄÄλÅóÓÑÖªµÀÓÐûÓбȽϼòµ¥µÄ·½·¨¿ÉÒԵóöÑØ¸ß¶Ô³ÆµãµÄKµãµÄ×ø±ê£¿ 2) Perform a second VASP run: ÔÚÕâ¸ö·½·¨ÖÐ×ÔÇ¢Ô¤ËãÐèÒªÔËÐÐÁ½±é£¬ÄÇÎÒÏëÖªµÀµÚÒ»±é×ÔÇ¢ÔËËãµÄ×÷ÓÃÊÇʲô£¿ÎÒµÄÏë·¨ÊÇ£ºÈç¹ûÎÒµÄKPOINTSÎļþÊÂÏȾͰ´ÕÕËûÉÏÃæËù˵µÄ³ÌÐò¶¼ÉèÖúÃÁË£¨¼´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. £©£¬ÄÇÎÒÊDz»ÊÇÖ±½ÓÔËÐÐÒ»±é×ÔÇ¢ÔËËã¾Í¿ÉÒԵóö½á¹û£¬²»ÐèÒªÏñһ¥Ëù˵µÄÄÇÑù½øÐÐÁ½±éÔËË㣬ÒòΪ±Ï¾¹Õâ¸öÔËËãÊÇÏ൱ºÄʱ¼äµÄ¡£ ÓÐÄÄλ¸ßÈË¿ÉÒÔÖ¸µãһϣ¿ |
12Â¥2011-03-31 21:31:26
wuli8
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- ÔÚÏß: 1114.6Сʱ
- ³æºÅ: 465889
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zzy870720z(½ð±Ò+2): ллָ½Ì 2011-04-01 16:31:44
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ÔÚһ¥ÄãÌùµÄÄǸö¹Ù·½»Ø´ðÀï±ß˵µÄºÜÃ÷°× -) First perform a selfconsistent Hartree-Fock/HSE calculation using a conventional KPOINTS file. µÚÒ»±éÔËÐоÍÊÇHSE×ÔÇ¢ÔËË㣬¶ø·ÇÆÕͨµÄDFTÔËËã¡£ [ Last edited by ½ºþÖ®Ô¶ on 2011-4-2 at 09:45 ] |
14Â¥2011-04-02 09:35:22
wuli8
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15Â¥2011-09-26 15:58:46
16Â¥2012-07-25 20:59:00
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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
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Â¥Ö÷µÄµÚÒ»²½½øÐÐDFTÔËËãµÄÒâ˼ÊǽṹÓÅ»¯ÖÐµÄÆÕͨDFTÔËËã°É ¹Ù·½ÄǾ仰ÖеÄFirst perform a selfconsistent Hartree-Fock/HSE calculation using a conventional KPOINTS fileÓ¦¸ÃÒ²ÊÇÔڽṹÓÅ»¯Ö®ºó½øÐеľ²Ì¬×ÔÇ¢£¬¹Ù·½µÄ»Ø´ðºöÂÔÁË֮ǰһ²½µÄ½á¹¹ÓÅ»¯²½Öè¡£ ²»ÖªµÀÕâÑùÀí½â¶Ô²»¶Ô |
17Â¥2013-03-18 09:37:05
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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
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ÀÏÊÇÓÐÕâÑùµÄÌáʾ£º | | | W W AA RRRRR N N II N N GGGG !!! | | W W A A R R NN N II NN N G G !!! | | W W A A R R N N N II N N N G !!! | | W WW W AAAAAA RRRRR N N N II N N N G GGG ! | | WW WW A A R R N NN II N NN G G | | W W A A R R N N II N N GGGG !!! | | | | Your generating k-point grid is not commensurate to the symmetry | | of the lattice. This can cause slow convergence with respect | | to k-points for HF type calculations | | suggested SOLUTIONS: | | ) if not already the case, use automatic k-point generation | | ) shift your grid to Gamma (G) (e.g. required for hex or fcc lattice) | Õâ¸öÌáʾӦ¸Ã²»ÊÇÎÊÌ⣬ֻÊÇÒ»¸ö warning £¬ ¼ÌÐøËãÓ¦¸ÃûÎÊÌâ°É£¿ Äú×îºó½â¾öÁËÂ𣿠|
18Â¥2015-11-22 15:54:18
19Â¥2017-04-03 22:15:01














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