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

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 $\varphi$ are still unsolved. Here, we reveal that tiny uniform orbital magnetization $M[\eta ,\varphi ]$ 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 $\Delta F[h,\eta ,\varphi ]$, 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, $-3m_{1}h\eta \varphi$, 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.

arXiv comment19 pages, 15 figures, accepted for publication in Proceedings of the National Academy of Sciences (PNAS)

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Cited by in corpus (21)

• Correlated order at the tipping point in the kagome metal CsV${}_3$Sb${}_5$
• Charge-loop current order and Z3 nematicity mediated by bond-order fluctuations in kagome metal AV3Sb5 (A=Cs,Rb,K)
• Charge order above room-temperature in a prototypical kagome superconductor La(Ru${}_{1-x}$Fe${}_x$)${}_3$Si${}_2$
• Probing orbital magnetism of a kagome metal CsV3Sb5 by a tuning fork resonator
• Quantum geometric bounds for observables: Linear responses, Drude weight, and orbital magnetization
• Observation of Anomalous Thermal Hall Effect in a Kagome Superconductor
• Real-space Loop Current Pattern in Time-reversal-symmetry Breaking Phase in Kagome Metals
• Quantum-metric-induced giant and reversible nonreciprocal transport phenomena in chiral loop-current phases of kagome metals
• Revealing Rotational Symmetry Breaking Charge-density Wave Order in Kagome Superconductor (Rb, K)V${}_3$Sb${}_5$ by Ultrafast Pump-probe Experiments
• Low temperature phase transitions under CDW state in kagome metals AV3Sb5 (A=Cs,Rb,K): Significance of mix-type Fermi surface electron correlations
• Coherent Phonon Pairs and Rotational Symmetry Breaking of Charge Density Wave Order in the Kagome Superconductor CsV${}_3$Sb${}_5$
• Impact of charge-density-wave pattern on the superconducting gap in V-based kagome superconductors
• Unified mechanism of charge-density-wave and high-$T_c$ superconductivity protected from oxygen vacancies in bilayer nickelates
• Origin of switchable quasiparticle-interference chirality in loop-current phase of kagome metals measured by scanning-tunneling-microscopy
• Magnetic field-induced momentum-dependent symmetry breaking in a kagome superconductor
• Odd-parity quadrupole order and induced nonreciprocal transport in the kagome metal CsTi${}_3$Bi${}_5$ driven by quantum interference
• Robust $T$-Linear Resistivity due to SU(4) Valley + Spin Fluctuation Mechanism in Magic Angle Twisted Bilayer Graphene
• Giant Impurity Effects on Charge Loop Current Order States in Kagome Metals
• Microscopic evidence for imaginary charge density wave in a kagome metal
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• Microscopic origin of period-four stripe charge-density-wave in kagome metal CsV${}_3$Sb${}_5$