Charge density wave and large nonsaturating magnetoresistance in ${\mathrm{YNiC}}_{2}$ and ${\mathrm{LuNiC}}_{2}$

Charge density wave and large nonsaturating magnetoresistance in ${YNiC}_{2}$ and ${LuNiC}_{2}$

Kamil K. Kolincio, Marta Roman, and Tomasz Klimczuk

Phys. Rev. B 99, 205127 – Published 17 May 2019

Abstract

We report a study of physical properties of two quasi-low-dimensional metals ${YNiC}_{2}$ and ${LuNiC}_{2}$ including the investigation of transport, magnetotransport, galvanomagnetic, and specific heat properties. In ${YNiC}_{2}$ we reveal two subsequent transitions associated with the formation of weakly coupled charge density wave at $T_{CDW} = 318 K$ and its locking in with the lattice at $T_{1} = 275 K$ . These characteristic temperatures follow the previously proposed linear scaling with the unit cell volume, demonstrating its validity extended beyond the lanthanide-based $R {NiC}_{2}$ . We also find that, in the absence of magnetic ordering able to interrupt the development of charge density wave, the Fermi surface nesting leads to opening of small pockets, containing high-mobility carriers. This effect gives rise to substantial enhancement of magnetoresistance, reaching 470% for ${YNiC}_{2}$ and 50% for ${LuNiC}_{2}$ at $T = 1.9 K$ and $B = 9 T$ .

Received 8 February 2019
Revised 30 April 2019

DOI:https://doi.org/10.1103/PhysRevB.99.205127

Physics Subject Headings (PhySH)

Charge density waves Magnetoresistance Nesting Phase transitions

Carbides Metals Two-dimensional electron system

Resistivity measurements Specific heat measurements

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Kamil K. Kolincio^1,2,*, Marta Roman¹, and Tomasz Klimczuk¹

¹Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
²RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan

^*kamkolin@pg.edu.pl

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Vol. 99, Iss. 20 — 15 May 2019

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Figure 1
Powder x-ray diffraction patterns (black open points) with LeBail fit refinement (blue solid line) for ${YNiC}_{2}$ (a) and ${LuNiC}_{2}$ (b). Bragg peak positions for ${YNiC}_{2}$ and ${LuNiC}_{2}$ phases are marked by vertical violet lines. Similar green lines in panel (b) apply to the impurity phase ${Lu}_{4} {Ni}_{2} C_{5}$ . Difference between observed and calculated pattern is represented by a solid red line.
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Figure 2
[(a) and (b)] Temperature dependence of the normalized electrical resistivity $ρ_{x x} / ρ_{x x} (400$ K)(T) measured in magnetic fields varying from 0 to 9 T for ${YNiC}_{2}$ (a) and ${LuNiC}_{2}$ (b), respectively. Upper inset of panel (a) depicits the resistivity of ${YNiC}_{2}$ in the low-temperature limit. Fit to the data above the superconducting transition with Eq. (1) is shown with a red solid line. Lower inset shows the thermal hysteresis limited from below and above with temperatures $T_{1 L}$ and $T_{1 H}$ , respectively, in the vicinity of the lock-in transition. The legend for panels (a) and (b) is displayed in panel (b). (c) The characteristic temperatures $T_{CDW}$ and $T_{1}$ for ${YNiC}_{2}$ and ${LuNiC}_{2}$ compared with the analogous values for the other members of the $R {NiC}_{2}$ family. The solid lines correspond to the linear scaling with unit cell volume ( $V$ ), reported previously [18]. Green points correspond to the ${YNiC}_{2}$ and ${LuNiC}_{2}$ compounds studied in this paper. The Peierls temperature for ${LuNiC}_{2}$ has been determined in Refs. [18, 19], while, to the authors knowledge, there are no previous reports on CDW in ${YNiC}_{2}$ .
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Figure 3
[(a) and (b)] Magnetoresistance in ${YNiC}_{2}$ (a) and ${LuNiC}_{2}$ (b) as a function of applied magnetic field. [(c) and (d)] Kohler plots of the magnetoresistance in ${YNiC}_{2}$ (c) and ${LuNiC}_{2}$ (d) Inset of panel (c) shows the low-temperature range for ${YNiC}_{2}$ . [(e) and (f)] Thermal dependence of the normalized Hall resistivity $\frac{ρ_{y x}}{B}$ in ${YNiC}_{2}$ (e) and ${LuNiC}_{2}$ (f). The legend for (a), (b), (c), and (d) is displayed in panel (a).
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Figure 4
[(a) and (b)] Magnetic-field dependence of Hall resistivity $ρ_{y x}$ in ${YNiC}_{2}$ (a) and ${LuNiC}_{2}$ (b). The plots have been vertically shifted for clarity and the vertical scale applies to the plot for corresponding to $T = 1.9 K$ . [(c) and (d)] Hall conductivity $σ_{x y}$ in ${YNiC}_{2}$ (c) and ${LuNiC}_{2}$ (d). The black solid lines are representative fits to the experimental data with Eq. (9). [(e) and (f)] The results of the analysis of Hall resistivity and conductivity: mobilities $μ_{H}$ , $μ_{ext}$ and concentrations $n_{H}$ , $n_{eff}$ plotted as a function of temperature for ${YNiC}_{2}$ (e) and ${LuNiC}_{2}$ (f). The legend for (a), (b), (c), and (d) is displayed in panel (c).
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Figure 5
$C_{x y}$ parameters resulting from least-squares fit of $σ_{x x}$ with Eq. (9) for ${YNiC}_{2}$ (red color) and ${LuNiC}_{2}$ (blue color).
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Figure 6
(a) Specific heat of ${YNiC}_{2}$ as a function of temperature. The inset shows an expanded view on the vicinity of the Peierls transition. The anomalies are marked with arrows. Dashed line corresponds to the background subtracted to evaluate the excess specific heat corresponding to the transitions, highlighted with light violet color. The high-temperature measurements were performed with Apiezon L grease; see experimental section for details. (b) $\frac{C_{p}}{T} (T^{2})$ in the low-temperature region. Black solid line corresponds to the fit with Eq. (10) divided by $T$ on both sides.
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Physical Review B

covering condensed matter and materials physics

Charge density wave and large nonsaturating magnetoresistance in ${YNiC}_{2}$ and ${LuNiC}_{2}$

Kamil K. Kolincio, Marta Roman, and Tomasz Klimczuk

Phys. Rev. B 99, 205127 – Published 17 May 2019

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Physical Review B

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Charge density wave and large nonsaturating magnetoresistance in YNiC2 and LuNiC2

Kamil K. Kolincio, Marta Roman, and Tomasz Klimczuk

Phys. Rev. B 99, 205127 – Published 17 May 2019

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Charge density wave and large nonsaturating magnetoresistance in ${YNiC}_{2}$ and ${LuNiC}_{2}$