Hastatic order explained

Hastatic order is a fundamental way of breaking double "time-reversal" symmetry.^[1] It is present in the heavy-fermion compound URu₂Si₂.^[2] This order was dubbed hastatic from hasta, the Latin word for "spear".^[3] Its cycle is twice as complex as magnetism.

Discovery

Hastatic order was first reported in January 2013 when the heavy-fermion uranium compound URu₂Si₂ was cooled to nearly -415F. It was said to produce extra heat and the heat was the main mystery. After the extra heat was released, particles were arranged at this way, making the hastatic order present on that reaction.

References

• Flint. Rebecca. Coleman. Piers. Spins, electrons and broken symmetries: Realizations of two-channel Kondo physics. Comptes Rendus Physique. August 2014. 15. 7. 557–562. 10.1016/j.crhy.2014.06.004. 1408.2411 . 2014CRPhy..15..557F . 118718896.

Notes and References

1. Web site: Francis. Matthew. Double time-reversal asymmetry could explain weird material behavior. 30 January 2013. Ars Technica. 20 August 2015.
2. Web site: Scientists find weird new property of matter that breaks all the rules. Arikia. Vox Media. The Verge. 18 February 2013.
3. Chandra. Premala. Coleman. Piers. Flint. Rebecca. Hastatic order in the heavy-fermion compound URu2Si2. Nature. January 2013. 493. 621. 621–626. 10.1038/nature11820. 20 August 2015. 2013Natur.493..621C. 23364741. 1207.4828. 205232317.