[理论室报告] Chiral Spin Condensates and Spontaneous Spin Hall Effects
Abstract: Spontaneous chiral symmetry breaking plays a fundamental role in a variety of complex systems in Nature, including physical, chemical and also biological objects. Recently chiral symmetry breaking has attracted considerable interests in quantum many-body physics such as topological superconductivity in strontium ruthenates and exotic atomic Bose-Einstein condensates in optical lattices. This talk will be focusing on the interplay of chirality and spin degrees of freedom. I will present our finding of a chiral spin condensate with generic chirality-spin locking originated from interaction effects for spinor bosons in double-valley optical lattices. Our results are independent of microscopic details. For optical lattices that break the inversion symmetry, the chiral spin condensate exhibits
XL, S. Natu et al., Nature Communications 5: 5174 (2014);
Ying-Hai Wu, XL *, S. Das Sarma, arXiv: 1702.01439 (2017)
spontaneous spin-Hall effects in spite of absence of bare spin-orbit couplings.
Host: Zi Yang Meng (9331)