Magnetic field induced chiral particle-hole condensates

TL;DR

This paper shows that magnetic fields can induce chiral particle-hole condensates in certain materials, which are robust against temperature changes and could be used to control anomalous Hall effects for technological applications.

Contribution

It reveals a universal mechanism for inducing chiral particle-hole condensates via magnetic fields in non-zero angular momentum states, highlighting their potential for practical manipulation.

Findings

Induction of chiral condensates is temperature-independent.

Magnetic coupling with orbital moments drives the induction.

Potential for manipulating anomalous Hall responses.

Abstract

We demonstrate that a chiral particle-hole condensate is always induced by a number-conserving ground state of non-zero angular momentum in the presence of a magnetic field. The magnetic interaction originates from the coupling with the intrinsic orbital moment of the chiral state when the field is applied perpendicularly to the plane. According to our numerical results the induction mechanism is practically temperature independent providing robustness to these states up to high temperatures. This opens the door for manipulating the anomalous Hall response resulting from this intricate class of states for technological applications while it also suggests that chiral particle-hole condensates may be hidden in various complex materials.