Coexistence and competition of multiple charge-density-wave orders in rare-earth tritellurides

Hu, Bin; Cheng, Buwen; Yuan, R. H.; Dong, Tao; Wang, N. L.

doi:10.1103/physrevb.90.085105

Cited by 67 publications

(67 citation statements)

References 34 publications

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“…4(e). Combining the multiple nesting properties discussed above, it is conspicuous that upon Pd intercalation, the interplay between these two collective phases yields competition, similar to the optical spectroscopy results upon chemical pressure, 30 and to the transport measurements under pressure. 31,32 These can to some extent be explicated by our multiple nesting properties, but not adequate yet.…”

supporting

confidence: 52%

“…This may be driven by the possible lattice distortion towards the tetragonal structure upon Pd intercalation, resulting from the competition between CDW orders for the low-energy spectral weight available for nesting. 30 Nevertheless, due to the longer than perfect nesting vector along a axis, the center of the second CDW gap still slightly locates below E F in x = 0.01. Thus, the gap further decreases even with an ideal nesting vector in x = 0.02.…”

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confidence: 96%

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Interplay between multiple charge-density waves and the relationship with superconductivity inPdxHoTe3

et al. 2016

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HoTe3, a member of the rare-earth tritelluride (RTe3) family, and its Pd-intercalated compounds, PdxHoTe3, where superconductivity (SC) sets in as the charge-density wave (CDW) transition is suppressed by the intercalation of a small amount of Pd, are investigated using angle-resolved photoemission spectroscopy (ARPES) and electrical resistivity. Two incommensurate CDWs with perpendicular nesting vectors are observed in HoTe3 at low temperatures. With a slight Pd intercalation (x = 0.01), the large CDW gap decreases and the small one increases. The momentum dependence of the gaps along the inner Fermi surface (FS) evolves from orthorhombicity to near tetragonality, manifesting the competition between two CDW orders. At x = 0.02, both CDW gaps decreases with the emergence of SC. Further increasing the content of Pd for x = 0.04 will completely suppress the CDW instabilities and give rise to the maximal SC order. The evolution of the electronic structures and electron-phonon couplings (EPCs) of the multiple CDWs upon Pd intercalation are carefully scrutinized. We discuss the interplay between multiple CDW orders, and the competition between CDW and SC in detail. The recent observation of charge ordering in cuprate high-temperature superconductors 1,2 has reignited interests in CDW and its interplay with SC. A new charge ordering is always introduced by different types of instabilities, such as lattice distortion or FS nesting. However, the driving force behind the CDW phase is still under debate.3-15 From a Peierls perspective, in an ideal one-dimensional (1D) system, the electronic susceptibility would develop a logarithmic divergence singularity at some sheets of the FSs spanning by nesting vectors via EPCs, and hence results in a phase transition to the CDW ground state accompanied by the commensurate/incommensurate periodic lattice distortions and the opening of energy gaps at E F .3,4 Although, the quasi two-dimensional (2D) materials have a weaker tendency towards the nesting-driven CDWs owing to the imperfect nesting caused by the increased FS curvature, the electronic susceptibility could still be enhanced sufficiently for a CDW to develop under favorable nesting conditions and EPCs.16-19 Therefore, the CDW states in quasi 2D systems are particularly attractive due to the existence of possible multiple nesting properties and interacting collective orders added by the extra dimensionality.The fairly simple electronic structure of RTe 3 , where the CDW instabilities usually develop in the planar square nets of tellurium, 14 provides an unprecedented opportunity to systematically investigate the CDW formation and its relationship with FS nesting under pretty accurate theoretical models. An incommensurate CDW modulation characterized by a wave vector q 1 ≈ 2/7c * was commonly observed. [20][21][22][23] Recently, a second CDW transition occurs at lower temperatures with q 2 ≈ 1/3a * perpendicular to the first was discovered in heavier members of RTe 3 .19,23,24 Additionally, by the Pd intercalation, the suppres...

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confidence: 52%

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confidence: 96%

Interplay between multiple charge-density waves and the relationship with superconductivity inPdxHoTe3

et al. 2016

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“…[16][17][18] Recently, a third type of CDW order has been suggested to appear in the RTe 3 compounds, possibly arising from a lifting of the degeneracy of conduction bands of double Te sheets. 19 Angle-resolved photoemission spectroscopy (ARPES) experiments confirm the quasi-2D nature of the electronic properties, showing partial gapping of the Fermi surface (FS) below the CDW ordering temperatures. 12,[20][21][22][23] Fermi surface nesting has been revealed as a strong candidate for driving the formation of CDWs in these compounds.…”

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confidence: 93%

Pressure dependence of the charge-density-wave and superconducting states inGdTe3, TbTe3, andDyTe3

et al. 2015

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We present electrical resistivity and ac-susceptibility measurements of GdTe3, TbTe3 and DyTe3 performed under pressure. An upper charge-density-wave (CDW) is suppressed at a rate of dTCDW,1/dP ∼ −85 K/GPa. For TbTe3 and DyTe3, a second CDW below TCDW,2 increases with pressure until it reaches the TCDW,1(P ) line. For GdTe3, the lower CDW emerges as pressure is increased above ∼ 1 GPa. As these two CDW states are suppressed with pressure, superconductivity (SC) appears in the three compounds at lower temperatures. Ac-susceptibility experiments performed on TbTe3 provide compelling evidence for bulk SC in the low-pressure region of the phase diagram. We provide measurements of superconducting critical fields and discuss the origin of a high-pressure superconducting phase occurring above 5 GPa.

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“…In particular, one can mention the "classical" CDW materials, such as [39][40][41][42] NbSe 3 , NbSe 2 , TaS 2 , blue bronzes K 0.30 MoO 3 and Rb 0.30 MoO 3 . CDW phase was also observed and actively investigated in the family of rareearth tritellurides RTe 3 [3][4][5]24,33,[43][44][45][46][47][48][49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Amplitude dynamics of the charge density wave in LaTe3 : Theoretical description of pump-probe experiments

et al. 2020

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We formulate a dynamical model to describe a photo-induced charge density wave (CDW) quench transition and apply it to recent multi-probe experiments on LaTe3 [A. Zong et al., Nat. Phys. 15, 27 (2019)]. Our approach relies on coupled time-dependent Ginzburg-Landau equations tracking two order parameters that represent the modulations of the electronic density and the ionic positions. We aim at describing the amplitude of the order parameters under the assumption that they are homogeneous in space. This description is supplemented by a three-temperature model, which treats separately the electronic temperature, temperature of the lattice phonons with stronger couplings to the electronic subsystem, and temperature of all other phonons. The broad scope of available data for LaTe3 and similar materials as well as the synergy between different time-resolved spectroscopies allow us to extract model parameters. The resulting calculations are in good agreement with ultrafast electron diffraction experiments, reproducing qualitative and quantitative features of the CDW amplitude evolution during the initial few picoseconds after photoexcitation.

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Coexistence and competition of multiple charge-density-wave orders in rare-earth tritellurides

Cited by 67 publications

References 34 publications

Interplay between multiple charge-density waves and the relationship with superconductivity inPdxHoTe3

Interplay between multiple charge-density waves and the relationship with superconductivity inPdxHoTe3

Pressure dependence of the charge-density-wave and superconducting states inGdTe3, TbTe3, andDyTe3

Amplitude dynamics of the charge density wave in LaTe3 : Theoretical description of pump-probe experiments

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