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0-D (clusters and embedded defects)
1-D (polymers)
2-D (slabs and surfaces)
3-D (bulk materials)

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constant pressure / constant volume / unit cell only / isotropic £¨ºãѹ/ºãÈÝ/µ¥Î»¾§°û/¸÷ÏòͬÐÔ£©
thermal/optical calculations £¨ÈÈ/¹âѧ¼ÆË㣩
application of external pressure £¨Ó¦ÓÃÍⲿѹÁ¦£©
user specification of degrees of freedom for relaxation £¨¿ÉÒÔÖ¸¶¨ÄÇЩ×ÔÓɶÈÒª³ÛÔ¥£©r
elaxation of spherical region about a given ion or point £¨¸ø¶¨Àë×Ó»òÖʵãµÄÇòÐÎÇøÓòµÄ³ÛÔ¥£©
symmetry constrained relaxation £¨¶Ô³ÆÐÔÏÞÖÆ³ÛÔ¥£©
unconstrained relaxation £¨ÎÞÏÞÖÆ³ÛÔ¥£©
constraints for fractional coordinates and cell strains £¨¿É¶Ô·ÖÊý×ø±êºÍ¾§°ûÓ¦Á¦¼ÓÏÞÖÆ£©
Newton/Raphson, conjugate gradients or Rational Function optimisers £¨¼¸ÖÖ×îС»¯Ëã·¨£©
BFGS or DFP updating of hessian £¨×îС»¯Ëã·¨£¬³ÌÐòĬÈϵģ©
limited memory variant of BFGS for large systems £¨¶Ô´óÌåϵBFGSµÄÏÞÖÆÄÚ´æ±äÁ¿£¿²»¶®£©
search for minima by genetic algorithms with simulated annealing £¨ÒÅ´«Ëã·¨»òÄ£ÄâÍË»ðѰÕÒ×îС£©
free energy minimisation with analytic first derivatives £¨ÓýâÎöÒ»½×µ¼ÊýÀ´×îС»¯×ÔÓÉÄÜ£©
choice of regular or domain decomposition algorithms for first derivative calculations £¨¶ÔÓÚÒ»½×µ¼Êý²ÉÓùæÔò»òÇøÓò·Ö½âËã·¨£©

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location of -th order
stationary points mode following

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elastic constants £¨µ¯ÐÔ³£Êý£©
bulk modulus (Reuss/Voight/Hill conventions)
shear modulus (Reuss/Voight/Hill conventions) ¼ôÇÐÄ£Á¿
Youngs modulus ÑîÊÏÄ£Á¿
Poisson ratios ²´ËɱÈ
compressibility ѹËõÂÊ
piezoelectric stress and strain constants ѹµçÓ¦Á¦ºÍÓ¦Á¦³£Êý
static dielectric constants ¾²Ö¹½éµç³£Êý
high frequency dielectric constants ¸ßƵ½éµç³£Êý
frequency dependent dielectric constants ƵÂÊÒÀÀµ½éµç³£Êý
static refractive indices ¾²Ì¬ÕÛÉäϵÊý
high frequency refractive indices ¸ßƵÕÛÉäϵÊý
phonon frequencies Éù×ÓÆµÂÊ
phonon densities of states (total and projected) Éù×Ó̬ÃܶÈ
phonon dispersion curves Éù×ÓɫɢÇúÏß
Born effective charges ²¨¶÷ÓÐЧµçºÉ
zero point vibrational energies ÁãµãÕñ¶¯ÄÜ
heat capacity (constant volume) ÈÈÈÝ
entropy (constant volume) ìØ
Helmholtz free energy ºÕÄ·»ô×È×ÔÓÉÄÜ

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vacancies, interstitials and impurities can be treated £¨¿Õλ¡¢¼ä϶ºÍÔÓÖÊ£©
explicit relaxation of region 1 £¨ÏÔʽËɳۣ©
implicit relaxation energy for region 2 £¨²»Ã÷È·³ÛÔ¥ÄÜ£¿£©
energy minimisation and transition state calculations are possible £¨ÄÜÁ¿×îС»¯ºÍ¹ý¶É̬¼ÆË㣩
defect frequencies can be calculated (assuming no coupling with 2a)£¨È±ÏÝÆµÂÊ£©

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calculation of surface and attachment energies ±íÃæ¸½×ÅÄÜ
multiple regions allowed with control over rigid or unconstrained movement £¨¸ÕÌå»òÎÞÏÞÖÆÒÆ¶¯£©
can be used to simulate grain boundaries Ä£Äâ¾§½ç
calculation of phonons allowed for region 1 Éù×Ó¼ÆËã

Á¦³¡ÄâºÏ£¨GULPµÄÀϱ¾ÐУ¬Ò²ÊǺܶàÈËÓÃËüµÄ×îÖ÷ÒªÔ­Òò£©
empirical fitting to structures, energies and most crystal properties £¨¶Ô½á¹¹¡¢ÄÜÁ¿ºÍ´ó¶àÊý¾§ÌåÌØÐԵľ­ÑéÄâºÏ£©
fit to multiple structures simultaneously £¨Í¬Ê±ÄâºÏ¶à¸ö½á¹¹£©
simultaneous relaxation of shell coordinates during fitting £¨ÄâºÏ¹ý³ÌÖÐͬʱ³ÛÔ¥shell×ø±ê£©
fit to structures by either minimising gradients or displacements £¨Í¨¹ýÌݶÈ×îС»¯»òÎ»ÒÆ×îС»¯À´ÄâºÏ½á¹¹£©
variation of potential parameters, charges and core/shell charge splits £¨ÊÆÄܲÎÊý±ä¸ü£¬µçºÉºÍcore/shellµçºÉ·ÖÁÑ£©
constraints available for fitted parameters £¨¿ÉÒÔ¶ÔÄâºÏ²ÎÊýÊ©¼ÓÏÞÖÆ£©
generate initial parameter sets by the genetic algorithm for subsequent refinement £¨¶ÔËæºóµÄÒÅ´«Ëã·¨¾«ÐÞÉèÖóõʼ²ÎÊý£©
fit to quantum mechanically derived energy hypersurfaces £¨¶ÔÁ¿×ÓÁ¦Ñ§µ¼³öµÄÄÜÁ¿³¬ÇúÃæÄâºÏ£©

½á¹¹·ÖÎö
calculate bond lengths/distances £¨¼ü³¤ºÍ¾àÀ룩
calculate bond angles ¼ü½Ç
calculate torsion angles Ťת½Ç
calculate out of plane distances  £¨out of plane ¾àÀ룩
calculation of the density and cell volume £¨¾§°ûÃܶȺÍÌå»ý£©
electrostatic site potentials £¨¾²µçλÖÃÊÆÄÜ£©
electric field gradients µç³¡ÌݶÈ

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convert centred cell to primitive form £¨×ª»»ÎªËؾ§°û£©
creation of supercells ´´½¨³¬¾§°û

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use EEM to calculate charges for systems containing H, C, N, O, F, Al, Si, P
use QEq to calculate charges for any element
new modified scheme for hydrogen within QEq that has correct forces

[ Last edited by abcasi on 2009-12-14 at 14:21 ]
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