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顺水

金虫 (小有名气)

[交流] 【求助】谁用过vasp 5.2?5.2和4.6的差别在哪里? 已有3人参与

谁用过vasp 5.2?5.2和4.6的差别在哪里?谢谢!


1、4.6的赝势库5.2还能用吗?
2、5.2的GW能准确的算出gap吗?
3、5.2计算能光学性质,只能计算体系的介电常数吗?
4、5.2的速度比4.6快多少?
………………

期待高手回答!!
期待更多问题!!
感谢回帖的诸位!!
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顺水

金虫 (小有名气)

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gavinliu7390(金币+2,VIP+0):谢谢回帖! 11-25 09:55
VASP 5.2.2: Release note
We are happy to announce the release of the new version of the Vienna ab-initio simulation package VASP - VASP.5.2. The new release contains many additional features which enhance the functionality of the program package - we emphasize in particular the ability to perform calculations using exact non-local exchange or hybrid functionals and of many-body perturbation (GW) calculations. A list of all new features, including references to the pertinent publications is given below.

New features in VASP5.2

Less memory demanding on massively parallel machines
   (support by the IBM Blue Gene team is gratefully acknowledged)

New gradient corrected functionals
    - AM05 [49,50,51]
    - PBEsol [52]
    - new functionals can be applied using standard PBE POTCAR files
    (improved one-center treatment)
Finite differences with respect to changes in the
    - ionic positions
    - lattice vectors
    This allows the automated determination of second derivatives yielding
    - inter-atomic force constants and phonons (requires a supercell approach)
    - elastic constants
    Symmetry is automatically considered and lowered during the calculations.

Linear response with respect to changes in the
    - ionic positions
    - electrostatic fields[82]
    This allows the calculation of second derivatives yielding
    - inter-atomic force constants and phonons (requires a supercell approach)
    - Born effective charge tensor
    - static dielectric tensor (electronic and ionic contribution)
    - internal strain tensors
    - piezoelectric tensors (electronic and ionic contribution)
    Linear response is only available for local and semi-local functionals.

Exact non-local exchange and hybrid functionals
    - Hartree-Fock method
    - hybrid functionals, specifically PBE0 and HSE06 [66,73,74]
    - screened exchange
    - Experimental: simple model GW-COHSEX (applies empirically screened exchange kernels)
    - Experimental: hybrid functional B3LYP
Frequency dependent dielectric tensor by summation over eigenstates
    - in the independent particle approximation
    - in the random phase approximation (RPA) via GW routines
    - available for local, semi-local, hybrid functionals, screened exchange and Hartree-Fock
Fully frequency dependent GW at the speed of the plasmon pole model [85,86]
    - single shot GW
    - iteration of eigenvalues in G and W until selfconsistency is reached[88]
    - Experimental: self-consistent GW by iterating the eigenstates in G (and optionally W)
    - Experimental: total energies from GW using the RPA approximation to the correlation energy[89]
    - vertex corrections (local field effects) in G and W in the LDA (available only non-spin polarized)[88]
    - Experimental: many-body vertex corrections in W (available only non-spin polarized)
Experimental:
    - TD-HF and TD-hybrid functionals by solving the Cassida equation (non-spin polarized only, Tamm-Dancoff approximation)[80]
    - Bethe-Salpeter on top of GW
     (non-spinpolarized only using Tamm-Dancoff approximation)
For all features marked "Experimental", no support is presently available. These features are supplied "as is", they are expected to be stable, but they have not been widely applied and tested. Eventually these features might become fully supported.


IMPORTANT: The present version of the code has been tested only using the Intel Fortran compiler (ifc.10.X, ifc.11.X). Support for other compilers is presently not available.

IMPORTANT: Certain features implemented in the new version of VASP (exact exchange, hybrid functionals, and GW calculations) are computationally very demanding. We advise all VASP users interested in using these functionalities to consult the publications listed above.

[ Last edited by ?? on 2009-11-24 at 17:32 ]
2楼2009-11-24 17:26:06
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TIGERYZZ

金虫 (小有名气)

★ ★
aylayl08(金币+2,VIP+0):谢谢专家指点 11-24 19:11
引用回帖:
Originally posted by 顺水 at 2009-11-24 17:23:
谁用过vasp 5.2?5.2和4.6的差别在哪里?谢谢!


1、4.6的赝势库5.2还能用吗?
2、5.2的GW能准确的算出gap吗?
3、5.2计算能光学性质,只能计算体系的介电常数吗?
4、5.2的速度比4.6快多少?
…………… ...

4.6的赝势5.2还能用, 并且很多赝势5.2并没有太大的更新。
光学性质就我所知只能算介电常数,不能算跃迁矩阵,吸收反射谱,并且介电常数感觉是已经做过修正的,希望有做过的人一起讨论。
速度方面确实快了,我的机子做汞算例的话,4.6,约160s,5.2,约145s。可以供你作下参考。
GW和HF我没用过。
3楼2009-11-24 19:07:59
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ice_rain

铁杆木虫 (正式写手)


zxzj05(金币+1,VIP+0):讨论奖励! 11-25 10:14
不过vasp 5.2中好像有了混合泛函,不知道能不能给出准确的带隙。 现在机子上5.2,一直不行,所以无法做相关的测试。
4楼2009-11-24 19:59:15
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liangab_234620

木虫 (小有名气)


yjmaxpayne(金币+1,VIP+0):谢谢 11-25 21:10
5.2速度是提高了,而且内存要求小了,能用混合泛函,不过其他功能貌似还是不是很强大,等着他的更新包吧。
5楼2009-11-25 11:09:35
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zdd2008

金虫 (职业作家)


aylayl08(金币+1,VIP+0):谢谢交流 11-26 21:40
同意5楼!!不过,现在5.2的CONTCAR里多了一行原子的类别,ATAT有时用不了!!
6楼2009-11-26 16:38:35
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顺水

金虫 (小有名气)

引用回帖:
Originally posted by zdd2008 at 2009-11-26 16:38:35:
同意5楼!!不过,现在5.2的CONTCAR里多了一行原子的类别,ATAT有时用不了!!

呵呵
这个东西偶开始还以为是错的
7楼2010-10-03 09:54:35
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轻风龙骑士

新虫 (初入文坛)

真好,学习了!!!
自然如何呈现给我们,取决于我们用多少时间去观察他
8楼2010-11-14 11:57:19
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techfan

铁虫 (小有名气)

多谢分享
9楼2012-02-17 15:27:01
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