[WIP] Fix bump phonopy

[naik-aakash]

Changes

1. Update phonopy version
2. Switch off the Gruneisen parameter computations at gamma point following (Gruneisen API results different when updating phonopy from v2.27.0 to >=v2.28  phonopy/phonopy#455 (comment))

Todo

• Investigate what cause the change in gruneisen parameter value leading to failure in test
• Fix failing phonon workflow with using latest phonopy version (v2.30.1)

[naik-aakash]

Hi @JaGeo ,

I had a look at the phonopy source code changes between v2.28 and v.2.27, I could not really pinpoint what is causing the issue with different values of the average Gruneisen parameter here.

I guess it has something to do with following PR. But am not sure about it

phonopy/phonopy@c013a19

[JaGeo]

How large are the changes? Could you give more details? Thanks!

[naik-aakash]

The average Gruneisen value now comes out to be 1.271535057337552 using v2.28 (using v2.27 we used to get 1.1882292157682082)

[JaGeo]

Yeah, I think we need a bit more analysis here. This is quite a large change

[naik-aakash]

The latest version of phonopy causes phonon workflow test to also fail (cause of failure seems to originate from force constants computation default being changed)

[JaGeo]

I would need more details to act. E.g., How large is the change? Why does this only affect the Grüneisen parameter workflow? What is different?

We can do this privately if you prefer.

[naik-aakash]

I would need more details to act. E.g., How large is the change? Why does this only affect the Grüneisen parameter workflow? What is different?

We can do this privately if you prefer.

As I have mentioned above, now with latest version phonon workflow test is also affected. I will try to share the details in next days

[JaGeo]

@naik-aakash i see! Thanks!