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Xu, Xiaofeng; Carrington, A.; Coldea, A. I.; Enayati-Rad, A; Narduzzo, Alessandro; Horii, Shigeru; Hussey, N. E.

doi:10.1103/physrevb.81.224435

Cited by 17 publications

(12 citation statements)

References 34 publications

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“…3 (a), suggesting an antiferromagnetic phase transition. This anisotropic magnetization implies that the spins are aligned predominantly within the ac plane 19 .…”

Section: Resultsmentioning

confidence: 99%

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Zhou

et al. 2018

Phys. Rev. B

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Heavy fermions represent an archetypal example of strongly correlated electron systems which, due to entanglement among different interactions, often exhibit exotic and fascinating physics involving Kondo screening, magnetism and unconventional superconductivity. Here we report a comprehensive study on the transport and thermodynamic properties of a cerium-based heavy fermion compound CeBi2 which undergoes an anti-ferromagnetic transition at TN ∼ 3.3 K. Its high temperature paramagnetic state is characterized by an enhanced heat capacity with Sommerfeld coefficient γ over 200 mJ/molK 2 . The magnetization in the magnetically ordered state features a metamagnetic transition. Remarkably, a large negative magnetoresistance associated with the magnetism was observed in a wide temperature and field-angle range. Collectively, CeBi2 may serve as an intriguing system to study the interplay between f electrons and the itinerant Fermi sea.

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“…3 (a), suggesting an antiferromagnetic phase transition. This anisotropic magnetization implies that the spins are aligned predominantly within the ac plane 19 .…”

Section: Resultsmentioning

confidence: 99%

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Zhou

et al. 2018

Phys. Rev. B

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“…In quasi-1D PrBa 2 Cu 4 O 8 , a field-induced reduction in the dimensionality of the chain carriers drives a spin–flop transition of the local moments on the Pr sites25. There, the persistence of the dimensional crossover beyond T N (ref.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous loss of interlayer coherence and long-range magnetism in quasi-two-dimensional PdCrO2

et al. 2017

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In many layered metals, coherent propagation of electronic excitations is often confined to the highly conducting planes. While strong electron correlations and/or proximity to an ordered phase are believed to be the drivers of this electron confinement, it is still not known what triggers the loss of interlayer coherence in a number of layered systems with strong magnetic fluctuations, such as cuprates. Here, we show that a definitive signature of interlayer coherence in the metallic-layered triangular antiferromagnet PdCrO2 vanishes at the Néel transition temperature. Comparison with the relevant energy scales and with the isostructural non-magnetic PdCoO2 reveals that the interlayer incoherence is driven by the growth of short-range magnetic fluctuations. This establishes a connection between long-range order and interlayer coherence in PdCrO2 and suggests that in many other low-dimensional conductors, incoherent interlayer transport also arises from the strong interaction between the (tunnelling) electrons and fluctuations of some underlying order.

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“…One obvious measure of the degree of three-dimensionality in a q1D FL is the interchain hopping integral t ⊥ (For simplicity, we assume here that 2 t ⊥ is the same in both directions orthogonal to the conducting chains). As stated above, in Pr124, a consistent value of 2 t ⊥ ~ 5 meV has been obtained from a variety of studies1314182226. For Li 0.9 Mo 6 O 17 , band structure calculations suggest that 2 t ⊥ ~ 36 meV27, while the resistive anisotropy ( ρ a / ρ b ~ 0.5( t // / t ⊥ ) 2 ), combined with an estimate of the intrachain bandwidth t // from angle-resolved photoemission28, gives 2 t ⊥ ~ 15 meV.…”

Section: Discussionmentioning

confidence: 52%

“…above T max ~ 150 K), the electronic state of Pr124 does not appear to undergo any transition or crossover to TLL physics once k B T > 2 t ⊥ , in contrast to certain prevailing theoretical arguments. There is now a significant body of experimental evidence suggesting that the effective dimensionality of the conduction electrons in Pr124 can be modified through changes in temperature13, intrachain scattering22 and magnetic fields1426 (i.e. once the energy scale of the relevant perturbation exceeds 2 t ⊥ ).…”

Section: Discussionmentioning

confidence: 99%

The Wiedemann-Franz law in the putative one-dimensional metallic phase of PrBa2Cu4O8

Bangura

Wakeham

et al. 2013

Sci Rep

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The nature of the electronic state of a metal depends strongly on its dimensionality. In a system of isolated conducting chains, the Fermi-liquid (quasiparticle) description appropriate for higher dimensions is replaced by the so-called Tomonaga-Luttinger liquid picture characterized by collective excitations of spin and charge. Temperature is often regarded as a viable tuning parameter between states of different dimensionality, but what happens once thermal broadening becomes comparable to the interchain hopping energy remains an unresolved issue, one that is central to many organic and inorganic conductors. Here we use the ratio of the thermal to electrical conductivities to probe the nature of the electronic state in PrBa 2 Cu 4 O 8 as a function of temperature. We find that despite the interchain transport becoming non-metallic, the charge carriers within the CuO chains appear to retain their quasiparticle nature. This implies that temperature alone cannot induce a crossover from Fermi-liquid to Tomonaga-Luttinger-liquid behaviour in quasi-one-dimensional metals. U nderstanding how the electronic state evolves in quasi-one-dimensional (q1D) metals as coupling between individual chains is strengthened or weakened, and determining the energy scale for the Fermi-liquid to Tomonaga-Luttinger liquid (FL-TLL) crossover, remain profound theoretical problems that are relevant to a host of organic and inorganic q1D conductors 1 . Temperature T is often regarded as a viable tuning parameter between states of different dimensionality in q1D metals. For k B T , 2t H , the interchain hopping integral, charge hops coherently in all three dimensions, albeit with anisotropic velocities. Once thermal broadening is comparable to the warping of the Fermi sheets however, hopping between chains is predicted to become incoherent, leading to a putative 3D-1D dimensional crossover 2 and contrasting behaviour in the intra-and inter-chain resistivities at high T. As a result, signatures of TLL physics are expected to emerge with increasing temperature 3 . In an alternative picture, it is argued that interchain coherence in a q1D FL is robust provided the intrachain scattering rate C , e F , the Fermi energy 4 . Accordingly, there is no dimensional crossover with increasing T, and by inference, no FL-TLL crossover at elevated temperatures -the crossover to non-metallic behaviour in the interchain resistivity being simply due to the emergence of a second, incoherent hopping process which shorts out the small, but nonetheless metallic component 4 . In order to address this outstanding issue experimentally, it is necessary to identify both a material whose anisotropic resistivity exhibits behaviour consistent with predictions for a thermally-induced dimensional crossover and a physical property that shows marked differences in the putative TLL and FL regimes. According to both theory and experiment, the Wiedemann-Franz (WF) law is a viable litmus test of TLL physics in the bulk. The WF law states that the ratio of the thermal k to the e...

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Dimensionality-driven spin-flop transition in quasi-one-dimensionalPrBa2Cu4O8

Cited by 17 publications

References 34 publications

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Kondo behavior and metamagnetic phase transition in the heavy-fermion compound CeBi2

Simultaneous loss of interlayer coherence and long-range magnetism in quasi-two-dimensional PdCrO2

The Wiedemann-Franz law in the putative one-dimensional metallic phase of PrBa2Cu4O8

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