Electronic structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:msub><mml:mrow><mml:mtext>NiC</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mtext>Sm</mml:mtext></mml:mrow></mml:math>, Gd, and Nd) intermetallic compounds

Laverock, J.; Haynes, T. D.; Utfeld, C.; Dugdale, Stephen B

doi:10.1103/physrevb.80.125111

Cited by 49 publications

(45 citation statements)

References 14 publications

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“…Electronic bandstructure calculations of SmNiC 2 have indicated a CDW wave vector of ͑0.5, 0.56, 0͒, close to the observed q CDW . 14 However, the published Fermi surface is composed of warped planes perpendicular to a, 14 a feature which would support the interpretation of a as the direction of the CDW, in agreement with the classical picture of band structures of CDW materials. 13 Here we will show that the CDW in SmNiC 2 should be interpreted as a commensurate CDW centered on chains of Ni atoms along a.…”

Section: Introductionsupporting

confidence: 62%

Commensurate charge-density wave with frustrated interchain coupling inSmNiC2

Wölfel

Shimomura

et al. 2010

Phys. Rev. B

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Temperature-dependent x-ray diffraction on SmNiC 2 has shown that the orthorhombic lattice symmetry of this compound persist down to a temperature of at least 9 K, i.e., into the charge-density-wave ͑CDW͒ state below T CDW = 148 K and in the ferromagnetically ordered state below T C = 17.7 K. The modulated crystal structure has been determined for the incommensurate CDW state with q CDW = ͑0.5, 0.516, 0͒ at T = 60 K. The observed atomic modulation displacements indicate that the CDW should be considered as a commensurate CDW centered on chains of Ni atoms along a. Frustrated interchain coupling is responsible for the incommensurability of the three-dimensionally ordered CDW state.

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Section: Introductionsupporting

confidence: 62%

Commensurate charge-density wave with frustrated interchain coupling inSmNiC2

Wölfel

Shimomura

et al. 2010

Phys. Rev. B

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“…Most of the members of the latter family exhibit the Peierls transitions towards the charge density wave state 27 . The relevance of a Peierls instability has been confirmed for R = Gd, Tb, Nd, Pr and Sm, while the LaNiC 2 and CeNiC 2 compounds do not show any anomalies that could be attributed to CDW [28][29][30][31][32] . Instead, LaNiC 2 is an unconventional noncentrosymmetric superconductor with T c = 2.7 K [33][34][35] .…”

Section: Introductionmentioning

confidence: 86%

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

et al. 2017

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We have compared the magnetic, transport, galvanomagnetic and specific heat properties of CeNiC2, PrNiC2 and NdNiC2 to study the interplay between charge density waves and magnetism in these compounds. The negative magnetoresistance in NdNiC2 is discussed in terms of the partial destruction of charge density waves and an irreversible phase transition stabilized by the field induced ferromagnetic transformation is reported. For PrNiC2 we demonstrate that the magnetic field initially weakens the CDW state, due to the Zeeman splitting of conduction bands. However, the Fermi surface nesting is enhanced at a temperature related to the magnetic anomaly.

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“…At T = 20 K, which corresponds to T N , one observes an abrupt decrease of resistivity. This crossover is an universal feature of the RNiC 2 family and can be attributed both to the reconstruction of the conduction bands driven by magnetoelastic modification of the crystallographic structure 30,31 upon a transition to the magnetically ordered state and to the consequent destruction of CDW state resulting in release of condensed carriers. Despite the ≃ 40% resistivity drop in GdNiC 2 , its magnitude is notably smaller than in SmNiC 2 39 .…”

Section: Resultsmentioning

confidence: 99%

“…For R = Sm, the magnetic ground state is ferromagnetic (FM), while compounds with R = (Gd, Tb and Nd) show antiferromagnetic (AF) character 26,28,29 . The anomalous temperature dependence of electrical resistivity and lattice constants of RNiC 2 30 have been identified as genuine Peierls transitions associated with partial nesting of the Fermi surface (FS) built of warped sheets perpendicular to a axis 31,32 . This charge density wave instability, associated with distortion of Ni atoms 33 , is accompanied with opening of an electronic gap and condensation of a certain portion of electronic carriers 34 .…”

Section: Introductionmentioning

confidence: 99%

Field-induced suppression of charge density wave in GdNiC2

et al. 2016

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We report the specific heat, magnetic, magnetotransport and galvanomagnetic properties of polycrystalline GdNiC2. In the intermediate temperature region above TN = 20 K, we observe large negative magnetoresistance due to Zeeman splitting of the electronic bands and partial destruction of a charge density wave ground state. Our magnetoresistance and Hall measurements show that at low temperatures a magnetic field induced transformation from antiferromagnetic order to a metamagnetic phase results in the partial suppression of the CDW.

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Electronic structure ofRNiC2(R=Sm, Gd, and Nd) intermetallic compounds

Cited by 49 publications

References 14 publications

Commensurate charge-density wave with frustrated interchain coupling inSmNiC2

Commensurate charge-density wave with frustrated interchain coupling inSmNiC2

Magnetism and charge density waves inRNiC2(R=Ce,Pr,Nd)

Field-induced suppression of charge density wave in GdNiC2

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