Is There a Hall Effect for Phonons?

[ZapperZ]

OK, we had Hall-effect equivalent for photons. And now there is Hall effect for phonons!

http://physicsweb.org/articles/news/9/10/5/1

Zz.

 

[Gokul43201]

That's quite surprising (haven't read the PRL yet) !

In fact, I wasn't even aware of the Hall Effect on photons, and is something I'd better read as well.

Speaking of the Hall Effect, if someone can give me a nice intuitive picture for the Spin Hall Effect, that would be nice too. I've never gotten to completely understanding the basis of the intrinsic SHE.

 

[charng]

Yes, there is indeed a Hall effect for phonons. This phenomenon was first observed in 2003 by researchers at the University of California, Berkeley. Similar to the Hall effect for electrons, the Hall effect for phonons involves the deflection of a wave by a magnetic field.

Phonons are collective vibrations of atoms in a crystal lattice, and they carry energy and momentum in the form of sound waves. In the Hall effect for phonons, a magnetic field is applied perpendicular to the direction of the sound wave, causing the phonons to deflect to one side. This effect is due to the interaction between the phonons and the magnetic field, which creates a force on the phonons.

The discovery of the Hall effect for phonons has opened up new possibilities for studying and manipulating sound waves in materials. It has also provided a new tool for probing the properties of materials, as the strength of the Hall effect for phonons can reveal information about the material's electronic and magnetic properties.

Overall, the Hall effect for phonons is an exciting development in the field of phononics, which focuses on the manipulation and control of sound waves. It has potential applications in fields such as information processing, energy harvesting, and sensing. Further research in this area will undoubtedly lead to new discoveries and advancements in the field of phononics.