The Crystal Structure of Neodymium Tritelluride

Norling, Barry K.; Steinfink, H.

doi:10.1021/ic50043a004

Cited by 91 publications

(67 citation statements)

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“…The a-axis CDW diffraction intensities are non-zero at every (2n±q a , 0, all) order in TbTe 3 , in a fashion consistent with diffraction patterns of both the a-axis CDW in ErTe 3 [14] and lattice Bragg orders (2n, 0, 2m) for RTe 3 compounds [28]. We present in Fig.…”

Section: Experimental Methods and Resultssupporting

confidence: 78%

Charge transfer and multiple density waves in the rare earth tellurides

et al. 2013

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Abstract:We use high-resolution synchrotron x-ray diffraction to uncover a second, lowtemperature, charge density wave (CDW) in TbTe 3 . Its T c2 = 41.0 ± 0.4 K is the lowest discovered so far in the rare earth telluride series. The CDW wave vectors of the high temperature and low temperature states differ significantly and evolve in opposite directions with temperature, indicating that the two nested Fermi surfaces are separated and the CDWs coexist independently. Both the in-plane and out-of-plane correlation lengths are robust, implying that the density waves on different Te layers are well coupled through the TbTe layers. Finally, we rule out any low-temperature CDW in GdTe 3 for temperatures above 8 K, an energy scale sufficiently low to make pressure tuning of incipient CDW order a realistic possibility.

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Section: Experimental Methods and Resultssupporting

confidence: 78%

Charge transfer and multiple density waves in the rare earth tellurides

et al. 2013

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“…These systems exhibit an incommensurate CDW, stable across the available rare-earth series. 9 All these compounds have the same average crystal structure ͑belonging to the Cmcm space group 10 ͒ made up of square planar Te sheets 11 and insulating corrugated RTe layers which act as charge reservoirs for the Te planes. The lattice constant decreases on going from R as La to R as Tm, 12 i.e., by decreasing the ionic radius of the rare-earth atom.…”

Section: Introductionmentioning

confidence: 99%

Chemical pressure and hidden one-dimensional behavior in rare-earth tri-telluride charge-density wave compounds

et al. 2006

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We report on the first optical measurements of the rare-earth tri-telluride charge-density wave systems. Our data, collected over an extremely broad spectral range, allow us to observe both the Drude component and the single-particle peak, ascribed to the contributions due to the free charge carriers and to the charge-density wave gap excitation, respectively. The data analysis displays a diminishing impact of the charge-density wave condensate on the electronic properties with decreasing lattice constant across the rare-earth series. We propose a possible mechanism describing this behavior and we suggest the presence of a one-dimensional character in these two-dimensional compounds. We also envisage that interactions and umklapp processes might play a relevant role in the formation of the charge-density wave state in these compounds.

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“…Moreover, the competition among several possible order parameters leads to rich phase diagrams, which can be tuned by external variables as temperature, magnetic field, and both chemical and applied pressure [1,2]. Tunable external parameters also affect the effective dimensionality of the interacting electron gas, which plays an essential role in defining the intrinsic electronic properties of the investigated systems.The rare-earth tri-tellurides RTe 3 (R= La-Tm, excepting Eu [3]) are the latest paramount examples of low dimensional systems exhibiting an incommensurate chargedensity-wave (CDW) state, stable across the available rare-earth series [4,5]. The lattice constant decreases on going from R = La to R = Tm [6,7], i.e.…”

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confidence: 99%

“…The rare-earth tri-tellurides RTe 3 (R= La-Tm, excepting Eu [3]) are the latest paramount examples of low dimensional systems exhibiting an incommensurate chargedensity-wave (CDW) state, stable across the available rare-earth series [4,5]. The lattice constant decreases on going from R = La to R = Tm [6,7], i.e.…”

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confidence: 99%

Pressure Dependence of the Charge-Density-Wave Gap in Rare-Earth Tritellurides

Sacchetti

Arcangeletti²,

Perucchi³

et al. 2007

Phys. Rev. Lett.

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We investigate the pressure dependence of the optical properties of CeTe3, which exhibits an incommensurate charge-density-wave (CDW) state already at 300 K. Our data are collected in the mid-infrared spectral range at room temperature and at pressures between 0 and 9 GPa. The energy for the single particle excitation across the CDW gap decreases upon increasing the applied pressure, similarly to the chemical pressure by rare-earth substitution. The broadening of the bands upon lattice compression removes the perfect nesting condition of the Fermi surface and therefore diminishes the impact of the CDW transition on the electronic properties of RTe3. The physical properties of low-dimensional systems have fascinated researchers for a great part of the last century, and have recently become one of the primary centers of interest in condensed matter research. Lowdimensional systems not only experience strong quantum and thermal fluctuations, but also admit ordering tendencies which are difficult to realize in three-dimensional materials. Prominent examples are spin-and chargedensity waves in quasi-one-dimensional compounds [1]. Moreover, the competition among several possible order parameters leads to rich phase diagrams, which can be tuned by external variables as temperature, magnetic field, and both chemical and applied pressure [1,2]. Tunable external parameters also affect the effective dimensionality of the interacting electron gas, which plays an essential role in defining the intrinsic electronic properties of the investigated systems.The rare-earth tri-tellurides RTe 3 (R= La-Tm, excepting Eu [3]) are the latest paramount examples of low dimensional systems exhibiting an incommensurate chargedensity-wave (CDW) state, stable across the available rare-earth series [4,5]. The lattice constant decreases on going from R = La to R = Tm [6,7], i.e. by chemically compressing the lattice, as consequence of the reduced ionic radius of the rare-earth atom. The CDW state in RTe 3 can be then investigated as a function of the inplane lattice constant a, which is directly related to the Te-Te distance in the Te-layers.Recently, we have reported on the first optical measurements of RTe 3 [8]. Our data, collected over an extremely broad spectral range, allowed us to observe both the Drude component and the single-particle peak, ascribed to the contributions due to the free charge carriers and to the excitation across the charge-density-wave gap, respectively. We established a diminishing impact of the charge-density-wave condensate on the electronic properties of RTe 3 with decreasing a across the rare-earth series [8]. On decreasing a, a reduction of the CDW gap together with an enhancement of the metallic (Drude) contribution were observed in the absorption spectrum. This is the consequence of a quenching of the nesting condition, driven by the modification of the Fermi surface (FS) because of the lattice compression [8].We present in this letter infrared optical investigations of the pressure dependence of the optical ...

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The Crystal Structure of Neodymium Tritelluride

Cited by 91 publications

References 0 publications

Charge transfer and multiple density waves in the rare earth tellurides

Charge transfer and multiple density waves in the rare earth tellurides

Chemical pressure and hidden one-dimensional behavior in rare-earth tri-telluride charge-density wave compounds

Pressure Dependence of the Charge-Density-Wave Gap in Rare-Earth Tritellurides

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