Charge density wave in a doped Kondo chain

Huang, Yixuan; Ting, C. S.

doi:10.1103/physrevb.99.195109

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…However, in some other CDW systems where the condition of the FS nesting is not well satisfied, e.g., in some transition metal dichalcogenides, other CDW mechanisms have been proposed, such as excitonic interaction [5,6], Jahn-Teller effect [7,8], momentumdependent EPC [9], and strong electron correlation [10], which are still hotly debated. CDW can also occur in strongly correlated Kondo lattice systems [11,12], but how the CDW ordering interacts with the many-body Kondo effect remains largely unexplored. Theoretically, the many-body Kondo screening [13,14] requires mobile conduction electrons near E F , while the CDW order normally reduces the DOS near E F via gap opening.…”

Section: Introductionmentioning

confidence: 99%

Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe

Fang

et al. 2021

Sci. China Phys. Mech. Astron.

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Using angle-resolved photoemission spectroscopy (ARPES) and low-energy electron diffraction (LEED), together with densityfunctional theory (DFT) calculation, we report the formation of charge density wave (CDW) and its interplay with the Kondo effect and topological states in CeSbTe. The observed Fermi surface (FS) exhibits parallel segments that can be well connected by the observed CDW ordering vector, indicating that the CDW order is driven by the electron-phonon coupling (EPC) as a result of the nested FS. The CDW gap is large (~0.3 eV) and momentum-dependent, which naturally explains the robust CDW order up to high temperatures. The gap opening leads to a reduced density of states (DOS) near the Fermi level (E F ), which correspondingly suppresses the many-body Kondo effect, leading to very localized 4f electrons at 20 K and above. The topological Dirac cone at the X point is found to remain gapless inside the CDW phase. Our results provide evidence for the competition between CDW and the Kondo effect in a Kondo lattice system. The robust CDW order in CeSbTe and related compounds provide an opportunity to search for the long-sought-after axionic insulator.

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Section: Introductionmentioning

confidence: 99%

Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe

Fang

et al. 2021

Sci. China Phys. Mech. Astron.

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“…The spincharge interplay brings about the possibility of spontaneous formation of the CDW, without relying on repulsive Coulomb interactions or electron-phonon interactions 33 . Indeed, it was shown that a CDW appears in the Kondo lattice model in one 34 , two 35 , and infinite dimensions 36,37 . Similar instability was also discussed for the periodic Anderson model 38,39 .…”

Section: Introductionmentioning

confidence: 99%

Charge density waves in multiple-$Q$ spin states

Hayami,

Motome

2021

Preprint

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Coupling between spin and charge degrees of freedom in electrons is a source of various electronic and magnetic properties of solids. We theoretically study charge density waves induced by the spin-charge coupling in the presence of magnetic orderings in itinerant magnets. By performing a perturbative calculation in the weakcoupling limit of the Kondo lattice model, we derive a useful formula for the relationship between charge and spin density waves, which can be applied to any magnetic orderings, including noncollinear and noncoplanar ones composed of multiple spin density waves called multiple-Q magnetic orderings. We demonstrate the predictive power for single-Q and double-Q states including skyrmion and meron-antimeron crystals on a square lattice, in comparison with the numerical calculations. Moreover, we show that the charge density waves contain richer information than the spin density waves, and are indeed useful in distinguishing the spin textures with similar spin structure factors. We discuss the relation to bond modulation in terms of the kinetic bond energy and the vector spin chirality. We also perform numerical calculations beyond the perturbative regime and find that the charge density waves can be enhanced when the electron filling is commensurate. Furthermore, we investigate the effect of the spin-orbit coupling, which can lead to additional charge density waves owing to effective anisotropic magnetic interactions in momentum space. Our result will provide a way to identify complex magnetic orderings and their origins from the charge modulations.

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“…At small J the Kondo effect is suppressed and the phase belongs to a universal class of Tomonaga-Luttinger liquid at generic fillings with zero charge and spin gap 21,22 . However, for certain J at the commensurate fillings of n = 1 2 23 , n = 3 4 24 , and n = 1 25 the state becomes insulating, and the insulating state at the quarter filling (n = 1…”

Section: Introductionmentioning

confidence: 99%

Coupled dimer and bond-order-wave order in the quarter-filled one-dimensional Kondo lattice model

Huang,

Sheng,

Ting

2020

Preprint

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Motivated by the experiments on the organic compound (P er)2[P t(mnt)2], we study the ground state of the one-dimensional Kondo lattice model at quarter filling with the density matrix renormalization group method. We show a coupled dimer and bond-order-wave (BOW) state in the weak coupling regime for the localized spins and itinerant electrons, respectively. The quantum phase transitions for the dimer and the BOW orders occur at the same critical coupling parameter Jc, with the opening of a charge gap. The emergence of the combination of dimer and BOW order agrees with the experimental findings of the simultaneous Peierls and spin-Peierls transitions at low temperatures, which provides a theoretical understanding of such phase transition. We also show that the localized spins in this insulating state have quasi-long ranged spin correlations with collinear configurations, which resemble the classical dimer order in the absence of a magnetic order.

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Charge density wave in a doped Kondo chain

Cited by 8 publications

References 45 publications

Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe

Charge density wave and weak Kondo effect in a Dirac semimetal CeSbTe

Charge density waves in multiple-$Q$ spin states

Coupled dimer and bond-order-wave order in the quarter-filled one-dimensional Kondo lattice model

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