当前位置: 首页 > 第一原理 >Anharmonic Phonons

Anharmonic Phonons

作者 漫天飘雪
来源: 小木虫 700 14 举报帖子
+关注

anharmonic phonons

phq: temperature dependent phonon quasiparticle dispersions of complex crystals from first principles. (https://github.com/mineralscloud/phq)

sscha: the stochastic self-consistent harmonic approximation: calculating vibrational properties of materials with full quantum and anharmonic effects. (https://sscha.eu/)

csld: a comprehensive package to study lattice dynamics from first-principles. the interatomic force constants were fitted using the compressive sensing algorithm. (https://github.com/llnl/csld)

aflow-aapl: automation of phonon calculations and thermal conductivity. (https://www.nature.com/articles/s41524-017-0046-7)

alamode: high-order force constants and self-consistent phonons. (https://alamode.readthedocs.io/)

almabte: boltzmann transport for device level simulations. (https://almabte.bitbucket.io/)

dynaphopy: anharmonic phonons from molecular dynamics simulations. (https://abelcarreras.github.io/dynaphopy/index.html)

d3q: 3-phonon processes and stochastic self-consistent phonons using random displacements. (https://anharmonic.github.io/)

phono3py: 3-phonon processesand thermal conductivity from finite-displacements. (https://phonopy.github.io/phono3py/)

scalid: self-consistent phonon approach, but no longer developed and fails for optic modes. (https://www.uquantchem.com/scaild.html)

shengbte: 3-phonon processes and thermal conductivity from finite-displacements. (https://www.shengbte.org/)

tdep: effective hamiltonian approach for anharmonic systems from molecular dynamics simulations. (https://ollehellman.github.io/)

openbte: an open source, parallel solver based on the phonon mean-free-path dependent boltzmann transport equation and heat diffusion equation, and it is interfaced to the most popular first-principles thermal conductivity solvers. (https://openbte.readthedocs.io/)

hiphive: hiphive is a tool for efficiently extracting high-order force constants from atomistic simulations, most commonly density functional theory calculations. it has been implemented in the form of a python library, which allows it to be readily integrated with many first-principles codes and analysis tools accessible in python. (https://hiphive.materialsmodeling.org/)

phonts: phonts is a lattice dynamics code that calculates thermal conductivity via the solution of the boltzmann transport equation (bte) for phonons.

kaldo:kaldo is a modern python-based software that implements both the boltzmann transport equation (bte) and the quasi-harmonic green kubo (qhgk) method, which runs on gpus and cpus using tensorflow. more details can be found on the kaldo website (https://github.com/nanotheorygroup/kaldo

fourphonon:an extension module to shengbte for computing four-phonon scattering rates and thermal conductivity. (https://github.com/fourphonon

[ Last edited by 漫天飘雪 on 2021-5-6 at 10:37 ] 返回小木虫查看更多

今日热帖
  • 精华评论
  • 漫天飘雪

    引用回帖:
    7楼: Originally posted by iamikaruk at 2021-03-23 09:56:42
    sscha用的是python和fortran混合编译。但是在处理Hessian的时候会非常麻烦,216个原子的立方体系计算Hessian需要大概1 T的内存。
    热输运我正在摸索,他们的code可以给出phono3py的FORCE_CONSTANTS和FC3格式文件, ...

    phonopy没有考虑frequency shift

  • iamikaruk

    引用回帖:
    9楼: Originally posted by 漫天飘雪 at 2021-03-23 11:23:55
    phonopy没有考虑frequency shift...

    sscha的动力学矩阵就是一个二阶相互作用力矩阵,差不多等同于声子谱。frequency shift是在用Hessian拟合求解FC3之后,算spectral时候才考虑的。

  • iamikaruk

    引用回帖:
    8楼: Originally posted by 漫天飘雪 at 2021-03-23 11:22:45
    超导的部分,是利用sscha求解出SSCHA phonon frequencies 和 polarizations,然后带入到Phys. Rev. Lett. 111, 177002 (2013)公式6中,求解α2F(ω)、λ以及Tc的。这是他们早期的做法。后来应该是和欧洲一些科学家 ...

    那应该就更简单了。cellconstructor模块里面有直接获得频率以及极化的函数,可以全部在python里面解决

  • 漫天飘雪

    引用回帖:
    11楼: Originally posted by iamikaruk at 2021-03-23 12:50:17
    那应该就更简单了。cellconstructor模块里面有直接获得频率以及极化的函数,可以全部在python里面解决。...

    是的。sscha团队发superconduct的文章,挂名的好多都是软件物理牛人,他们合作的不错。

  • iamikaruk

    引用回帖:
    12楼: Originally posted by 漫天飘雪 at 2021-03-23 14:27:16
    是的。sscha团队发superconduct的文章,挂名的好多都是软件物理牛人,他们合作的不错。...

    他们的方法基本上是目前最先进的,但是计算量莫名其妙的大,基本上算不动四阶声子相互作用力。

  • 漫天飘雪

    引用回帖:
    13楼: Originally posted by iamikaruk at 2021-03-23 14:37:51
    他们的方法基本上是目前最先进的,但是计算量莫名其妙的大,基本上算不动四阶声子相互作用力。...

    四阶声子相互作用力,计算量都挺大的。

  • iamikaruk

    引用回帖:
    14楼: Originally posted by 漫天飘雪 at 2021-03-23 14:47:02
    四阶声子相互作用力,计算量都挺大的。...

    相对来说,提取IFC还是问题不大的,但是sscha的速度实在是太慢了。

猜你喜欢