Evidence for a second-order phase transition around 350 K in 
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Kuo, C. N.; Chen, Wei-Tin; Tseng, Chin-Chung; Hsu, Chi-Cheng; Huang, Ran; Chou, F. C.; Kuo, Y. K.; Lue, Chin‐Shan

doi:10.1103/physrevb.97.094101

Cited by 18 publications

(4 citation statements)

References 41 publications

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“…x Rh 4 Sn 13 and Ca 3−x Ce x Rh 4 Sn 13 at high temperatures A signature of the structural transition is associated with a change of symmetry, which is usually accompanied by appearance of additional reflections (satellites) as it was previously reported for many similar systems [5,8,59,60]. Two scenarios have been suggested so far for structural deformations in 3:4:13 systems: (i) a CDW instability (e.g.…”

Section: New Insights Into Structural Properties Of Ca 3−x Lamentioning

confidence: 81%

“…In the Ca-La series a possible high temperature transition was observed around 250 K for Ca 2.8 La 0.2 Rh 4 Sn 13 ( figure 14(d)) but not for CaLa 2 Rh 4 Sn 13 ( figure 14(c)). The refinement of the temperature dependence of ADPs for Ca 2.8 La 0.2 Rh 4 Sn 13 ( figure 15(d)) revealed 4 characteristic regions: (1) up to 140 K where ADPs anomalously decrease, (2) between 140 and 250 K where they increase as expected from increased thermal fluctuations, (3) a 11 After the initial submission we have learnt that a transition similar to the one in La 3 Rh 4 Sn 13 has been observed in Ce 3 Rh 4 Sn 13 [60].…”

Section: Ca-la Seriesmentioning

confidence: 82%

“…In this case, the values of ADP have wrong absolute values but their mutual relations and general trends are preserved. [8,20,59,60,[63][64][65] 11 which was below the detection limit for the Supernova setup. We can estimate that for CaCe 2 Rh 4 Sn 13 the T HT lies between 310 and 320 K.…”

Section: Ca-ce Seriesmentioning

confidence: 83%

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The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

et al. 2018

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A comprehensive study of the electronic structure, thermodynamic and electrical transport properties reveals the existence of inhomogeneous superconductivity due to structural disorder in Ca 3 Rh 4 Sn 13 doped with La (Ca 3−x La x Rh 4 Sn 13 ) or Ce (Ca 3−x Ce x Rh 4 Sn 13 ) with superconducting critical temperatures T c  higher than those (T c ) observed in the parent compounds. The T−x diagrams and the entropy S(x) T isotherms document well the relation between the degree of atomic disorder and separation of the high-temperature T c  and T c -bulk phases. In these dirty superconductors, with the mean free path much smaller than the coherence length, the Werthamer-Helfand-Hohenber theoretical model does not fit well the H c2 (T) data. We demonstrate that this discrepancy can result from the presence of strong inhomogeneity or from two-band superconductivity in these systems. Both the approaches very well describe the H−T dependencies, but the present results as well as our previous studies give stronger arguments for the scenario based on the presence of nanoscopic inhomogeneity of the superconducting state. A comparative study of La-doped and Ce-doped Ca 3 Rh 4 Sn 13 showed that in the disordered Ca 3−x Ce x Rh 4 Sn 13 alloys the presence of spin-glass effects is the cause of the additional increase of T c  in respect to the critical temperatures of disordered Ca 3−x La x Rh 4 Sn 13 . We also revisited the nature of structural phase transition at T 130 170 ~¸K and documented that there might be another precursor transition at higher temperatures. Raman spectroscopy and thermodynamic properties suggest that this structural transition may be associated with a CDW-type instability.

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Section: New Insights Into Structural Properties Of Ca 3−x Lamentioning

confidence: 81%

Section: Ca-la Seriesmentioning

confidence: 82%

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The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

et al. 2018

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“…109) [54][55][56], and the cubic compound Ce 3 Rh 4 Sn 13 (SG I2 1 3, No. 199) [57,58], in panels A-D, respectively. Details of the data analyses are explained in the caption.…”

Section: Weyl-kondo Semimetal Candidate Materialsmentioning

confidence: 99%

How to identify and characterize strongly correlated topological semimetals

Kirschbaum,

Lužnik,

Roy

et al. 2023

J. Phys. Mater.

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How strong correlations and topology interplay is a topic of great current interest. In this perspective paper, we focus on correlation-driven gapless phases. We take the time-reversal symmetric Weyl semimetal as an example because it is expected to have clear (albeit nonquantized) topological signatures in the Hall response and because the first strongly correlated representative, the noncentrosymmetric Weyl–Kondo semimetal Ce3Bi4Pd3, has recently been discovered. We summarize its key characteristics and use them to construct a prototype Weyl–Kondo semimetal temperature-magnetic field phase diagram. This allows for a substantiated assessment of other Weyl–Kondo semimetal candidate materials. We also put forward scaling plots of the intrinsic Berry-curvature-induced Hall response vs the inverse Weyl velocity—a measure of correlation strength, and vs the inverse charge carrier concentration—a measure of the proximity of Weyl nodes to the Fermi level. They suggest that the topological Hall response is maximized by strong correlations and small carrier concentrations. We hope that our work will guide the search for new Weyl–Kondo semimetals and correlated topological semimetals in general, and also trigger new theoretical work.

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Suppression of Lattice Doubling in Quasi‐Skutterudite La₃Rh₄Sn₁₃: A Comparison of Temperature and Hydrostatic Pressure Routes

Sundaramoorthy,

Lingannan,

Kumar Mondal

et al. 2024

ChemPhysChem

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We present structural properties at different temperatures and high‐pressure (HP) of La3Rh4Sn13 which is one of the interesting systems in the Remika phase RE3Rh4Sn13 (RE = Sr, Ca, La, Pr, Ce) quasi‐skutterudite series using synchrotron diffraction. Data at ambient conditions revealed the presence of several weak reflections, which could be accounted only with a superlattice I* structure (I4132) with lattice parameter a ~19.457 Å. However, above 350 K, a complete suppression of the weak superlattice reflections of the I* structure is observed. Data at higher temperatures is found to be well described by the I structure (Pm‐3n) having half the lattice parameter compared to the I* structure. HP‐XRPD at ambient temperature showed that pressures greater than 7.5 GPa result in similar suppression of the weak I* superlattice reflections. Data at higher pressures is found to be well described by the I structure (Pm‐3n), similar to the high‐temperature phase. HP Raman measurements demonstrated changes that seem to be consistent with a locally more ordered structure as in the case of the I* à I transition. Our findings on La3Rh4Sn13 open up new avenues to study unexplored HP phenomena, especially the superconductivity in these Remika phase quasi‐skutterudites.

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Evidence for a second-order phase transition around 350 K in Ce3Rh4Sn13

Cited by 18 publications

References 41 publications

The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

How to identify and characterize strongly correlated topological semimetals

Suppression of Lattice Doubling in Quasi‐Skutterudite La₃Rh₄Sn₁₃: A Comparison of Temperature and Hydrostatic Pressure Routes

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Evidence for a second-order phase transition around 350 K in Ce3Rh4Sn13

Cited by 18 publications

References 41 publications

The effective increase in atomic scale disorder by doping and superconductivity in Ca3Rh4Sn13

The effective increase in atomic scale disorder by doping and superconductivity in Ca3Rh4Sn13

How to identify and characterize strongly correlated topological semimetals

Suppression of Lattice Doubling in Quasi‐Skutterudite La3Rh4Sn13: A Comparison of Temperature and Hydrostatic Pressure Routes

Contact Info

Product

Resources

About

The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

The effective increase in atomic scale disorder by doping and superconductivity in Ca₃Rh₄Sn₁₃

Suppression of Lattice Doubling in Quasi‐Skutterudite La₃Rh₄Sn₁₃: A Comparison of Temperature and Hydrostatic Pressure Routes