Possible Coexistence of Local Itinerancy and Global Localization in a Quasi-One-Dimensional Conductor

Narduzzo, Alessandro; Enayati-Rad, A; Horii, Shigeru; Hussey, N. E.

doi:10.1103/physrevlett.98.146601

Cited by 16 publications

(12 citation statements)

References 29 publications

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“…Upturns or divergence in ρ ( T ) have been widely reported in q1D materials and variously attributed to localization1819202122, multiband TLL physics23, DW formation2425, incipient density fluctuations16 and proximity to Mott instabilities8. Differentiating between these mechanisms has proved challenging, in part due to the microscopic similarity between localized electrons and randomly-pinned DWs in 1D.…”

Section: Resultsmentioning

confidence: 99%

A disorder-enhanced quasi-one-dimensional superconductor

et al. 2016

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A powerful approach to analysing quantum systems with dimensionality d>1 involves adding a weak coupling to an array of one-dimensional (1D) chains. The resultant quasi-1D (q1D) systems can exhibit long-range order at low temperature, but are heavily influenced by interactions and disorder due to their large anisotropies. Real q1D materials are therefore ideal candidates not only to provoke, test and refine theories of strongly correlated matter, but also to search for unusual emergent electronic phases. Here we report the unprecedented enhancement of a superconducting instability by disorder in single crystals of Na2−δMo6Se6, a q1D superconductor comprising MoSe chains weakly coupled by Na atoms. We argue that disorder-enhanced Coulomb pair-breaking (which usually destroys superconductivity) may be averted due to a screened long-range Coulomb repulsion intrinsic to disordered q1D materials. Our results illustrate the capability of disorder to tune and induce new correlated electron physics in low-dimensional materials.

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Section: Resultsmentioning

confidence: 99%

A disorder-enhanced quasi-one-dimensional superconductor

et al. 2016

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“…Interestingly, this rule, albeit its semiclassical origin, was found to be well obeyed in a large number of metals from conventional metals to some quantum matters. These involve the metals with two types of carriers, 17 the pseudogap phase of the underdoped cuprates, 22 quasi-one-dimensional metals 23,24 as well as some topological semimetals. 25 We examined this rule in PtBi 2 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, physical properties, and band structure of the layered bismuthidePtBi2

Xing

et al. 2016

Phys. Rev. B

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We report details of single crystal growth of stoichiometric bismuthide PtBi2 whose structure consists of alternate stacking of Pt layer sandwiched by Bi bilayer along the c-axis. The compound crystallizes in space group P-3 with a hexagonal unit cell of a=b=6.553Å, c=6.165Å. The magnetization data show opposite sign for fields parallel and perpendicular to the Pt layers, respectively. The T -dependent resistivity is typical of a metal and the magnetic response shows clear two types of charge carriers and the validity of the semi-classical Kohler's rule. Its physical properties was discussed in comparison with recently proposed topological superconductor β-PdBi2.

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“…As a result, the plots of ρ ρ Δ / 0 as a function of ρ H / 0 at distinct temperatures will collapse onto a single curve. Interestingly, this rule, although derived from the semiclassical Boltzmann theory, was found to be well obeyed in a large number of metals, including the metals with two types of carriers, the pseudogap phase of the underdoped cuprates [27] as well as some other Q1D metals [28]. The violation of such a rule is generally believed to result from the loss of carriers with temperature or from the fact that the anisotropic electron scattering rates do not have the same T scaling on different sections of the Fermi surface (FS).…”

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Quasi-linear magnetoresistance and the violation of Kohler’s rule in the quasi-one-dimensional Ta₄Pd₃Te₁₆superconductor

Jiao

Zhou

et al. 2015

J. Phys.: Condens. Matter

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We report on the quasi-linear in field intrachain magnetoresistance in the normal state of a quasi-one-dimensional superconductor Ta 4 Pd 3 Te 16 (T c ∼4.6 K). Both the longitudinal and transverse in-chain magnetoresistance shows a power-law dependence, ∆ρ∝B α , with the exponent α close to 1 over a wide temperature and field range. The magnetoresistance shows no sign of saturation up to 50 tesla studied. The linear magnetoresistance observed in Ta 4 Pd 3 Te 16 is found to be overall inconsistent with the interpretations based on the Dirac fermions in the quantum limit, charge conductivity fluctuations as well as quantum electron-electron interference. Moreover, it is observed that the Kohler's rule, regardless of the field orientations, is violated in its normal state. This result suggests the loss of charge carriers in the normal state of this chain-containing compound, due presumably to the charge-density-wave fluctuations.

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Possible Coexistence of Local Itinerancy and Global Localization in a Quasi-One-Dimensional Conductor

Cited by 16 publications

References 29 publications

A disorder-enhanced quasi-one-dimensional superconductor

A disorder-enhanced quasi-one-dimensional superconductor

Synthesis, physical properties, and band structure of the layered bismuthidePtBi2

Quasi-linear magnetoresistance and the violation of Kohler’s rule in the quasi-one-dimensional Ta₄Pd₃Te₁₆superconductor

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Possible Coexistence of Local Itinerancy and Global Localization in a Quasi-One-Dimensional Conductor

Cited by 16 publications

References 29 publications

A disorder-enhanced quasi-one-dimensional superconductor

A disorder-enhanced quasi-one-dimensional superconductor

Synthesis, physical properties, and band structure of the layered bismuthidePtBi2

Quasi-linear magnetoresistance and the violation of Kohler’s rule in the quasi-one-dimensional Ta4Pd3Te16superconductor

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Quasi-linear magnetoresistance and the violation of Kohler’s rule in the quasi-one-dimensional Ta₄Pd₃Te₁₆superconductor