449 citations · 819 across the 4 of their papers we have counts for
4 papers
Topological Insulators and Nematic Phases from Spontaneous Symmetry Breaking in 2D Fermi Systems with a Quadratic Band Crossing
Kai Sun, Hong Yao, Eduardo Fradkin +1
We investigate the stability of a quadratic band-crossing point (QBCP) in 2D fermionic systems. At the non-interacting level, we show that a QBCP exists and is topologically stable…
Time-Reversal Symmetry Breaking and Spontaneous Anomalous Hall Effect in Fermi Fluids
Kai Sun, Eduardo Fradkin
We study the spontaneous non-magnetic time-reversal symmetry breaking in a two-dimensional Fermi liquid without breaking either the translation symmetry or the U(1) charge symmetry…
Fluctuating Stripes in Strongly Correlated Electron Systems and the Nematic-Smectic Quantum Phase Transition
Kai Sun, Benjamin M. Fregoso, Michael J. Lawler +1
We discuss the quantum phase transition between a quantum nematic metallic state to an electron metallic smectic state in terms of an order-parameter theory coupled to fermionic qu…
Fermi liquid instabilities in the spin channel
Congjun Wu, Kai Sun, Eduardo Fradkin +1
We study the Fermi surface instabilities of the Pomeranchuk type in the spin triplet channel with high orbital partial waves (). The ordered phases are classified i…