pith. sign in

arxiv: 2303.00623 · v4 · pith:HAJKHMNRnew · submitted 2023-03-01 · ❄️ cond-mat.str-el · cond-mat.supr-con

Drastic magnetic-field-induced chiral current order and emergent current-bond-field interplay in kagome metals

classification ❄️ cond-mat.str-el cond-mat.supr-con
keywords ordercurrentkagomemetalsbondchiralinterplaydrastic
0
0 comments X
read the original abstract

In kagome metals, the chiral current order $\eta$ with time-reversal-symmetry-breaking is the source of various exotic electronic states, while the method of controlling the current order and its interplay with the star-of-David bond order $\phi$ are still unsolved. Here, we reveal that tiny uniform orbital magnetization $M[\eta,\phi]$ is induced by the chiral current order, and its magnitude is prominently enlarged under the presence of the bond order. Importantly, we derive the magnetic-field ($h$)-induced Ginzburg-Landau free energy expression $\Delta F[h,\eta,\phi]$, which enables us to elucidate the field-induced current-bond phase transitions in kagome metals. The emergent current-bond-$h$ trilinear coupling term in the free energy, $-3m_1 h\eta\phi$, naturally explains the characteristic magnetic field sensitive electronic states in kagome metals, such as the field-induced current order and the strong interplay between the bond and current orders. Furthermore, we present a natural explanation for the drastic strain-induced increment of the current order transition temperature T_{TRSB} reported by a recent experiment.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.