Hastatic order

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 −415 °F (−248.3 °C). 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

1. Francis, Matthew. "Double time-reversal asymmetry could explain weird material behavior". Ars Technica. Retrieved 20 August 2015.
2. Arikia. "Scientists find weird new property of matter that breaks all the rules". The Verge. Vox Media.
3. Chandra, Premala; Coleman, Piers; Flint, Rebecca (January 2013). "Hastatic order in the heavy-fermion compound URu2Si2" (PDF). Nature. 493 (621): 621–626. Bibcode:2013Natur.493..621C. doi:10.1038/nature11820. Retrieved 20 August 2015.

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