Charge density wave in kagome lattice intermetallic ScV6Sn6

Arachchige, Hasitha W. Suriya; Meier, William R.; Marshall, Madalynn; Matsuoka, Takahiro; Xue, Rui; McGuire, Michael A.; Hermann, Raphael P.; Cao, Huibo; Mandrus, David

doi:10.48550/arxiv.2205.04582

Cited by 6 publications

(14 citation statements)

References 57 publications

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“…Compared with the A V 3 Sb 5 family, the magnetic frustration and anisotropy contributed by the rare-earth R 3+ ions play an important role in determining the low-temperature transport properties of some R V 6 Sn 6 samples [ 34 ]. On the other hand, no SC was observed at 0.4 K for R V 6 Sn 6 ( R = Tb-Tm) [ 34 ], 80 mK for R = Sc [ 37 ], and 2 K for R = Y, Gd [ 33 ]. In addition, CDW transition is not a prevailing phenomenon in the series of R V 6 Sn 6 ; however, it is observed in ScV 6 Sn 6 at T * ≈ 92 K [ 37 ], showing a distinct triple modulation of the unit cell in comparison to the quadruple one observed in A V 3 Sb 5 .…”

Section: Introductionmentioning

confidence: 99%

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

et al. 2022

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RV6Sn6 (R = Sc, Y, or rare earth) is a new family of kagome metals that have a similar vanadium structural motif as AV3Sb5 (A = K, Rb, Cs) compounds. Unlike AV3Sb5, ScV6Sn6 is the only compound among the series of RV6Sn6 that displays a charge density wave (CDW) order at ambient pressure, yet it shows no superconductivity (SC) at low temperatures. Here, we perform a high-pressure transport study on the ScV6Sn6 single crystal to track the evolutions of the CDW transition and to explore possible SC. In contrast to AV3Sb5 compounds, the CDW order of ScV6Sn6 can be suppressed completely by a pressure of about 2.4 GPa, but no SC is detected down to 40 mK at 2.35 GPa and 1.5 K up to 11 GPa. Moreover, we observed that the resistivity anomaly around the CDW transition undergoes an obvious change at ~2.04 GPa before it vanishes completely. The present work highlights a distinct relationship between CDW and SC in ScV6Sn6 in comparison with the well-studied AV3Sb5.

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Section: Introductionmentioning

confidence: 99%

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

et al. 2022

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“…In particular, the Kagome layer in these compounds contain no other atoms in the quasi two dimensional Kagome network. Since RV 6 Sn 6 (R = Gd, Y, and Sc) compounds showed non-linear Hall resistivity, topologically nontrivial band structure, and CDW [22,23,58], it is of great interest to check other rare-earth-based compounds (R = Tb -Tm and Lu) whether the unconventional electronic states exist in the whole family of materials.…”

Section: Luv6sn6 and Yv6sn6mentioning

confidence: 99%

Anisotropic magnetic property of single crystals $R$V$_6$Sn$_6$ ($R$ = Y, Gd - Tm, Lu)

Lee,

Mun

2022

Preprint

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RV6Sn6 (R = Y, Gd -Tm, Lu) single crystals are synthesized by Sn-flux method and their physical properties are characterized by magnetization, resistivity, and specific heat measurements. Powder X-ray diffraction patterns of all samples can be well indexed with the hexagonal HfFe6Ge6type structure, where rare-earth atoms form hexagonal layers and vanadium atoms form Kagome layers. At high temperatures, magnetic susceptibility measurements of moment bearing rare-earths (R = Gd -Tm) follow Curie-Weiss behavior. Effective moments estimated from the polycrystalline average of magnetic susceptibility curves are consistent with the values for free R 3+ ion. Strong magnetic anisotropy due to crystalline electric field effects is observed for moment bearing rareearths, except GdV6Sn6. The easy magnetization direction is determined to be c-axis for R = Tb -Ho and ab-plane for R = Er, and Tm. The vanadium ions in RV6Sn6 possess no magnetic moment. The compounds for R = Y and Lu exhibit typical characteristics of paramagnetic metals. At low temperatures, the magnetic ordering is confirmed from magnetization, specific heat, and resistivity: the highest TN = 4.9 K for GdV6Sn6 and the lowest TN = 2.3 K for HoV6Sn6. No magnetic ordering is observed down to 1.8 K for R = Er and Tm. A slight deviation of the magnetic ordering temperature from the de Gennes scaling suggests the dominant Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange interaction between rare-earth moments in metallic RV6Sn6 compounds.

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“…Transition-metal-based kagome metals have attracted particular attention due to their natural potential to host topologically nontrivial electronic states and a wide variety of electronic correlations. The observation of unusually large anomalous Hall responses [2,11,12], complex itinerant magnetism [13,14], charge density waves [8,9,15,16], and superconductivity [17][18][19] etc. within kagome metals seemingly validates their promise as hosts of a rich frontier of unconventional ground states and phase behaviors.…”

Section: Introductionmentioning

confidence: 99%

Highly anisotropic magnetism in the vanadium-based kagome metal TbV6Sn6

Pokharel¹,

Ortiz²,

Sarte³

et al. 2022

Preprint

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RV 6 Sn 6 (R=rare earth) compounds are appealing materials platforms for exploring the interplay between R-site magnetism and nontrivial band topology associated with the nonmagnetic vanadium-based kagome network. Here we present the synthesis and characterization of the kagome metal TbV 6 Sn 6 via single crystal x-ray diffraction, magnetization, transport, and heat capacity measurements. Magnetization measurements reveal strong, uniaxial magnetic anisotropy rooted in the alignment of Tb 3+ moments in the interplane direction below 4.3(2) K. TbV 6 Sn 6 exhibits multiband transport behavior with high mobilities of charge carriers, and our measurements suggest TbV 6 Sn 6 is a promising candidate for hosting Chern gaps driven via the interplay between Tb-site magnetic order and the band topology of the V-site kagome network.

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Charge density wave in kagome lattice intermetallic ScV6Sn6

Cited by 6 publications

References 57 publications

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

Anisotropic magnetic property of single crystals $R$V$_6$Sn$_6$ ($R$ = Y, Gd - Tm, Lu)

Highly anisotropic magnetism in the vanadium-based kagome metal TbV6Sn6

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