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zxzj05(½ð±Ò+5):лл»ØÌû½»Á÷ 2010-04-04 20:40
zxzj05(½ð±Ò+5):лл»ØÌû½»Á÷ 2010-04-04 20:40
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vasp·Ö×Ó¶¯Á¦Ñ§Ä£Äâ¡£ ת×Ô£ºhttp://blog.163.com/ly0708@126/b ... 281201001181758620/ ת×Ô£ºhttp://muchong.com/bbs/viewthread.php?tid=1744011&fpage=0&view=&highlight=&page=1 vasp×ö·Ö×Ó¶¯Á¦Ñ§µÄºÃ´¦£¬ÓÉÓÚvaspÊǽüЩÄ꿪·¢µÄ±È½Ï³ÉÊìµÄÈí¼þ£¬ÔÚ×öµç×ÓscfËÙ¶È·½ÃæÓнϺõÄÓÅÊÆ¡£ ȱµã£º¿Éѡϵ×ÛÌ«ÉÙ¡£ ¾¡¹ÜÈç´Ë£¬¶ÔÓÚ´ó¶àÊýÓйطÖ×Ó¶¯Á¦Ñ§µÄÈÎÎñ»¹ÊÇ¿ÉÒÔʤÈεġ£ Ö÷ҪʹÓõÄϵ×ÛÊÇ NVT ºÍ NVE¡£ ÏÂÃæÎÒ½«¶ÔÖ÷Òª²ÎÊý½øÐнéÉÜ£¡ Ò»°ã×ö·Ö×Ó¶¯Á¦Ñ§µÄʱºò¶¼ÐèÒª½Ï¶àÔ×Ó£¬Ò»°ã¶¼³¬¹ý100¸ö¡£ µ±Ô×ÓÊý¶àµÄʱºò£¬kµãʵ¼Ê¾ÍÐèÒª½ÏÉÙÁË¡£ÓеÄʱºòÓÃÒ»¸ökµã¾ÍÐУ¬²»¹ýÕâ¶¼ÐèÒªÑϸñµÄ²âÊÔ¡£Í¨³£³¬¹ý200¸öÔ×ÓµÄʱºò£¬ÓÃÒ»¸ökµã£¬¼´Gammaµã¾Í¿ÉÒÔÁË¡£ INCAR£º EDIFF Ò»°ãÀ´Ëµ£¬ÓÃ1E-4 »òÕß1E-5¶¼¿ÉÒÔ£¬Õâ¸ö²ÎÊýÖ»ÊǶԵÚÒ»¸öÀë×Ó²½µÄ×ÔÇ¢Ó°Ïì´óһЩ£¬¶ÔÓÚ³¤Ê±¼äµÄ·Ö×Ó¶¯Á¦Ñ§µÄÄ£Ä⣬¾«¶ÈСһµãÒ²ÎÞËùν£¬µ«²»ÄÜ̫С¡£ IBRION=0 ·Ö×Ó¶¯Á¦Ñ§Ä£Äâ IALGO=48 Ò»°ãÓÃ48£¬¶ÔÓÚÔ×ÓÊý½Ï¶à£¬Õâ¸öÓÅ»¯·½Ê½½ÏºÃ¡£ NSW=1000 ¶àÉÙ¸öʱ¼ä²½³¤¡£ POTIM=3 ʱ¼ä²½³¤,µ¥Î»fs, ͨ³£1µ½3. ISIF=2 ¼ÆËãÍâ½çµÄѹÁ¦. NBLOCK= 1 ¶àÉÙ¸öʱ¼ä²½³¤£¬Ð´Ò»´ÎCONTCAR£¬CHGºÍCHGCAR£¬PCDAT. KBLOCK=50 NBLOCK*KBLOCK ¸ö²½³¤Ð´Ò»´Î XDATCAR. ISMEAR=-1 ·ÑÃ×µÏÀ¿Ë·Ö²¼. SIGMA =0.05 µ¥Î»:µç×Ó·ü NELMIN=8 Ò»°ãÓÃ6µ½8, ×îСµÄµç×ÓscfÊý.Ì«Éٵϰ,ÊÕÁ²µÄ²»ºÃ. LREAL=A APACO=10 ¾¶Ïò·Ö²¼º¯Êý¾àÀë, µ¥Î»Êǰ£. NPACO=200 ¾¶Ïò·Ö²¼º¯Êý²åµÄµãÊý. LCHARG=F ¾¡Á¿²»Ð´µçºÉÃܶÈ,·ñÔòCHGÎļþÌ«´ó. TEBEG=300 ³õʼζÈ. TEEND=300 ÖÕ̬ζȡ£ ²»ÉèµÄ»°£¬µÈÓÚTEBEG. SMASS -3 NVE ensemble;-1 ÓÃÀ´×öÄ£ÄâÍ˻𡣴óÓÚ0 NVT ϵ×Û¡£ NBLOCK= 1 Ö¸µÄÊǶàÉÙ¸öÀë×Ó²½£¨Ê±¼ä²½³¤Ö»ÊǶÔÓÚMD¶øÑÔ£¬¶ÔÓÚÆäËüµÄ¼ÆË㣬NBLOCKÒ²ÊÇÆð¿ØÖÆ×÷Óõģ©Ð´Ò»´ÎXDATCAR KBLOCK=50 NBLOCK*KBLOCK ¸öÀë×Ó²½Ð´Ò»´ÎPCDAT. CONTCARÊÇÿ¸öÀë×Ó²½Ö®ºó¶¼»áд³öÀ´µÄ£¬µ«ÊÇ»áÓÃеİÑÀϵĸ²¸Ç CHGÊÇÔÚÿ10¸öÀë×Ó²½Ð´Ò»´Î£¬²»»á¸²¸Ç CHGCARÊÇÔÚÈÎÎñÕý³£½áÊøÖ®ºó²ÅдµÄ¡£ VASP-md Ä£Äâ INCAR Àý×Ó ×ª×Ô£ºhttp://blog.163.com/xiaowei_0905 ... 183592010099379680/ This file determines the kind of job which VASP will perform; single point energy calculation (SPE), geometry optimisation (GO - coarse/fine), molecular dynamics (MD - nve/nvt), spin polarised calculation (mag). Examples can be found in /home/cs/model/vasp_util. Example; INCAR.spe $system = single point energy calc NELMIN = 4 minimum number of electronic SCF cycles EDIFF = 1E-6 stooping criterion for electronic convergence NSW = 0 number of ionic shifts ISMEAR = 0 treatment of partial occupancies of electronic levels Example; INCAR.coarse $system = coarse geom optimisation NELMIN = 4 EDIFF = 1E-2 EDIFFG = -1E-2 stopping criterion for forces Fmax < 0.01 eV/A IBRION = 2 minimisation method, good away from minimum ISIF = 3 optimise coords and cell pars LREAL =.TRUE. do calc in real space - quicker ISTART = 0 start with a random wavefunction NSW = 20 maximum of 20 ionic shifts ISMEAR = 0 LCHARG =.FALSE. don't write CHG and CHGCAR files Example; INCAR.fine $system = geom optimisation NELMIN = 4 EDIFF = 1E-6 EDIFFG = -1E-4 PREC = high increase energy cut-off by 25% IBRION = 1 minimisation method, good close to minimum ISIF = 3 NSW = 50 ISMEAR = 0 LCHARG=.FALSE. Example; INCAR.mag $system = collinear mag structure calc IBRION = 1 ISIF = 3 NPAR = 1 forces mag structure to be written in output file EDIFF = 1E-6 EDIFFG = -1E-3 PREC = high RWIGS = 1.376 0.900 1.233 1.302 radii for spherical integration of spin density, 1 per atom ISPIN = 2 do spin polarised calc MAGMOM = 24*0 5 -5 -5 5 initial mag moments for 28 atoms NSW = 20 Example; INCAR.nve $system = molecular dynamics ALGO = V MAXMIX = 40 IBRION = 0 do molecular dynamics NSW = 6000 number of time steps NBLOCK = 1 store structure every time step POTIM = 3.0 time step 3fs TEBEG = 673 target temperature ISYM = 0 turn off symmetry SMASS = -3 NVE ensemble LREAL =.TRUE. LCHARG =.FALSE. NELMIN = 4 PREC = LOW reduce energy cut-off by 25% for MD ISTART = 0 ISMEAR = 0; SIGMA=0.1 Example; INCAR.nvt $system = molecular dynamics ALGO = V MAXMIX = 40 IBRION = 0 NSW = 6000 NBLOCK = 1 POTIM = 3.0 TEBEG = 673 ISYM = 0 SMASS = 2 NVT ensemble, value determines frequency of coupling to heat bath LREAL =.TRUE. LCHARG =.FALSE. NELMIN = 4 PREC = LOW ISTART = 0 ISMEAR = 0; SIGMA=0.1 Example; INCAR.scale $system = molecular dynamics quench ALGO = V MAXMIX = 40 IBRION = 0 NSW = 50 NBLOCK = 5 rescale temperature every 5 steps POTIM = 3.0 TEBEG = 683 initial temp TEEND = 673 final temp ISYM = 0 SMASS = -1 MD with velocity scaling LREAL =.TRUE. LCHARG =.FALSE. NELMIN = 4 PREC = LOW ISTART = 0 ISMEAR = 0; SIGMA=0.1 |

8Â¥2010-04-04 10:58:56
wo8165827
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The Alloy-Theoretic Automated Toolkit (ATAT) ¿ÉÓ¦ÓÃÓÚVASP£¬¼ÆË㼤·¢Ì¬
gavinliu7390(½ð±Ò+10):лл²ÎÓ룡 2010-04-06 11:18
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The Alloy-Theoretic Automated Toolkit (ATAT) is a generic name that refers to a collection of alloy theory tools: • A code to construct cluster expansions from first-principles (MAPS). A cluster expansion is a very compact and efficient expression giving the energy of an substitutional alloy as a function of its configuration (i.e. which type of atom sits where on the lattice). • A code to perform Monte Carlo simulation of lattice models in order to compute thermodynamic properties of alloys starting from a cluster expansion. • Extension of the two above tools that allow the construction of so-called reciprocal-space cluster expansion, which are useful to model the energetics of alloys exhibiting a large atomic size mismatch. • Utilities to interface the above tools with first-principles codes (such as VASP). • Job control utilities that enable the efficient use of a cluster of workstations to run the first-principles codes that provide the input to the above codes. ¾ßÌå¿ÉÒÔ²ÎÕÕÍøÕ¾£º http://www.its.caltech.edu/~avdw/atat/ [ Last edited by wo8165827 on 2010-4-6 at 09:43 ] |

11Â¥2010-04-06 09:34:19
wangyujia
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gavinliu7390(½ð±Ò+10):лл֧³Ö£¡ 2010-04-18 18:05
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12Â¥2010-04-18 12:11:03
fulin
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21Â¥2010-05-01 10:48:35
guohg
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2Â¥2010-04-03 18:37:22
lono75
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3Â¥2010-04-03 19:53:48
freer007
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4Â¥2010-04-03 20:28:15
cuilin0512
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5Â¥2010-04-04 09:18:00
1357246
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׳ʿ
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6Â¥2010-04-04 09:38:15
gleerat
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7Â¥2010-04-04 09:55:24
tiantiandian
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9Â¥2010-04-04 12:14:53
ÈñÀûµÄË鯬
ľ³æ (ÕýʽдÊÖ)
star watcher
- 1STÇ¿Ìû: 1
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¡ï ¡ï ¡ï ¡ï ¡ï
gavinliu7390(½ð±Ò+10):лл²ÎÓë!ºÜºÃ! 2010-04-04 15:27
zxzj05(½ð±Ò+5):лл»ØÌû½»Á÷ 2010-04-04 20:40
gavinliu7390(½ð±Ò+10):лл²ÎÓë!ºÜºÃ! 2010-04-04 15:27
zxzj05(½ð±Ò+5):лл»ØÌû½»Á÷ 2010-04-04 20:40
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ʹÓÃelkÀïÃæµÄeos½øÐÐ״̬·½³ÌÄâºÏ elk£¨exciting£©Öи½´øÁËeos³ÌÐò¿ÉÒÔÓÃÓÚvaspµÄ½á¹¹ÓÅ»¯¹ý³Ì¡£eos¿ÉÒÔ½øÐжàÖÖ״̬·½³ÌµÄÄâºÏ¡£eosµÄÊäÈëÎļþΪeos.in¡£ ÊäÈë¾ÙÀý£º "Silicon" : cname 2 : natoms 1 : etype 140.0 450.0 1000 : vplt1, vplt2, nvplt 7 : nevpt 165.8207473 -578.0660968 196.8383062 -578.1728409 231.5010189 -578.2305598 270.0113940 -578.2548962 312.5719400 -578.2566194 359.3851654 -578.2453281 410.6535788 -578.2253154 466.5796888 -578.2028836 ÊäÈë¹æÔò: cname : name of crystal up to 256 characters natoms : number of atoms in unit cell etype : equation of state type (see below) vplt1, vplt2, nvplt : volume interval over which to plot energy, pressure etc. as well as the number of points in the plot nevpt : number of energy-volume points to be inputted vpt(i) ept(i) : energy-volume points (atomic units) Note that the input units are atomic - Bohr and Hartree (NOT Rydbergs). (×¢ÒⵥλÊÇBohrºÍHatree. Ŀǰ¿ÉÒÔ½øÐÐÒÔÏÂÄâºÏ£º 1. Universal EOS (Vinet P et al., J. Phys.: Condens. Matter 1, p1941 (1989)) 2. Murnaghan EOS (Murnaghan F D, Am. J. Math. 49, p235 (1937)) 3. Birch-Murnaghan 3rd-order EOS (Birch F, Phys. Rev. 71, p809 (1947)) 4. Birch-Murnaghan 4th-order EOS 5. Natural strain 3rd-order EOS (Poirier J-P and Tarantola A, Phys. Earth Planet Int. 109, p1 (1998)) 6. Natural strain 4th-order EOS 7. Cubic polynomial in (V-V0) |
10Â¥2010-04-04 13:24:55














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