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3Â¥2010-03-25 23:27:59
zxzj05
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aylayl08(½ð±Ò+5):very good ¡£thank you 2010-03-19 18:43
identation(½ð±Ò+10): 2010-03-19 23:50
identation(½ð±Ò+8):лл£¬ºìÍâ¹âÆ×µÄÊäÈëÎļþÔÚabinit˵Ã÷µÄÄÄÀïÄØ?¿É·ñÌáʾһÏ£¬ºÙºÙ 2010-03-25 23:28
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aylayl08(½ð±Ò+5):very good ¡£thank you 2010-03-19 18:43
identation(½ð±Ò+10): 2010-03-19 23:50
identation(½ð±Ò+8):лл£¬ºìÍâ¹âÆ×µÄÊäÈëÎļþÔÚabinit˵Ã÷µÄÄÄÀïÄØ?¿É·ñÌáʾһÏ£¬ºÙºÙ 2010-03-25 23:28
aylayl08(1STÇ¿Ìû+1):»Ø´ðºÜÇ¿ 2010-03-27 18:39
|
See Tv4#t56 and t57 e.g.#t56 #Compute GaAs crystal : ground-state with few bands, #then large number of bands, then ddk for different directions # ndtset 5 #First dataset : SC run with 2 kpoints prtden1 1 getden1 0 getwfk1 0 nband1 4 nstep1 30 #Second dataset : NSC run with 32 kpoints, lots of bands iscf2 -2 getwfk2 1 getden2 1 nband2 50 # ddk response function iscf3 -3 nqpt3 1 qpt3 0.0d0 0.0d0 0.0d0 rfdir3 1 0 0 rfelfd3 2 getwfk3 2 nband3 50 # ddk response function iscf4 -3 nqpt4 1 qpt4 0.0d0 0.0d0 0.0d0 rfdir4 0 1 0 rfelfd4 2 getwfk4 2 nband4 50 # ddk response function iscf5 -3 nqpt5 1 qpt5 0.0d0 0.0d0 0.0d0 rfdir5 0 0 1 rfelfd5 2 getwfk5 2 nband5 50 #Common data nshiftk 4 shiftk 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.5 0.0 0.0 0.0 0.5 ngkpt 2 2 2 kptopt 1 # Is this correct for preparation of optic ?? acell 3*10.60 amu 69.72 74.9216 diemac 10.0 ecut 4.00 iscf 3 ixc 3 natom 2 nband 4 nbdbuf 0 nstep 15 ntypat 2 rprim 0 .5 .5 .5 0 .5 .5 .5 0 xred 3*0.00d0 3*0.25d0 tnons 72*0.0 typat 1 2 tolwfr 1.e-22 znucl 31 33 t57 t56o_DS3_1WF7 t56o_DS4_1WF8 t56o_DS5_1WF9 t56o_DS2_WFK 0.001 ! Value of the smearing factor, in Hartree 0.010 1 ! Difference between frequency values (in Hartree), and maximum frequency ( 1 Ha is about 27.211 eV) 0.000 ! Scissor shift if needed, in Hartree 0.001 ! Tolerance on closeness of singularities (in Hartree) 3 ! Number of components of linear optic tensor to be computed 11 33 23 ! Linear coefficients to be computed (x=1, y=2, z=3) 2 ! Number of components of nonlinear optic tensor to be computed 123 222 ! Non-linear coefficients to be computed ²Î¿¼ÎÄÏ×£º "static" non-linear capabilities of ABINIT are used (Raman efficiencies, electro-optic coefficients ... ), the following paper should be mentioned : [11] M. Veithen, X. Gonze, and Ph. Ghosez, Phys. Rev. B 71, 125107 (2005) "Nonlinear optical susceptibilities, Raman efficiencies, and electrooptic tensors from firstprinciples density functional theory ". http://www.abinit.org/about/acknowledgments#11 V_2O_5ÀÂü¹âÆ×µÄµÚÒ»ÐÔÔÀí¼ÆËã--¡¶À¼ÖÝ´óѧ¡·2009Ä격ʿÂÛÎÄ http://www.science24.com/paper/16305 (Ab initio calculation of the Raman spectrum of Li2SrTa2O7 using generalized forces and symmetry coordinates) http://www3.interscience.wiley.c ... ETRY=1&SRETRY=0 (Raman spectrum of vanadium pentoxide from density-functional perturbation theory) NOTE: optdriver=5 allows to compute non-resonant Raman scattering - being non-resonant, metals are excluded -, and non-linear dielectric susceptibility at long-wavelength - being at long wavelength, metals are excluded - . For metals, frequency-dependent nlo should possible, in the simple sum-over-state approximation, using the "optics" utility. |

2Â¥2010-03-19 18:39:18
zxzj05
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4Â¥2010-03-27 01:40:04
linym
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5Â¥2010-08-10 06:04:40









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