Chiral crystal-structure transformation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>R</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Co</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mi>Sn</mml:mi><mml:mn>13</mml:mn></mml:msub></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>R</mml:mi><mml:mo>=</mml:mo><mml:mi>La</mml:mi><mml:mo> </mml:mo><mml:mtext>and</mml:mtext><mml:mo> </mml:mo><mml:mi>Ce</mml:mi></mml:math>)

Otomo, Yuka; Iwasa, Kazuaki; Suyama, Kazuya; Tomiyasu, Keisuke; Sagayama, Hajime; Sagayama, Ryoko; Nakao, Hironori; Kumai, Reiji; Murakami, Youichi

doi:10.1103/physrevb.94.075109

Cited by 33 publications

(39 citation statements)

References 34 publications

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“…The crystal structure in space group Pm3n gave an excellent fit to the SXRD with R F = 0.028. The resulting atomic parameters are equal to those reported for La 3 Co 4 Sn 13 at room temperature [12] and they are close to those reported for other R 3 T 4 Sn 13 compounds (Table S3 in [20]) [16,21].…”

Section: A Synthesis and X-ray Diffractionsupporting

confidence: 86%

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Second-order charge-density-wave transition in single crystals of La3Co4Sn13

Welsch

Ramakrishnan

Eisele

et al. 2019

Phys. Rev. Materials

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We present the temperature dependence of the electrical resistivity, the magnetic susceptibility, and the specific heat of a high-quality single crystal of La 3 Co 4 Sn 13 . As opposed to earlier reports on this system, these bulk properties exhibit clear anomalies at the phase transition at T * = 151(1) K, while the present data confirm the second-order character of this transition. X-ray diffraction with synchrotron radiation is used to solve the fourfold superstructure in space group I2 1 3 as it exists below T * in the charge-density-wave (CDW) state of La 3 Co 4 Sn 13 . Unlike conventional CDW systems, we have observed hysteresis between the zero-field-cooled and field-cooled magnetization below the CDW transition. This discrepancy can be attributed to a possible magnetic instability arising out of correlations of Co in the lattice, developing at the CDW transition. The crystal structure shows that any modifications of the electronic state of Co might be due to modified binding characteristics of the Sn atoms comprising the trigonal prismatic coordination of Co, while the coordination of Co itself is hardly changed at the phase transition. The superconducting transition is observed at T sc = 2.85(2) K. The superconducting energy gap is estimated as 5 K on the basis of the specific heat measured down to 0.1 K. These results suggest that La 3 Co 4 Sn 13 is a conventional weak-electron-phonon-coupling superconductor.

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Section: A Synthesis and X-ray Diffractionsupporting

confidence: 86%

“…Recent experiments did establish the second-order nature of the structural phase transition, but they failed to solve the crystal structure of the low-temperature phase [15]. Another study has presented the low-temperature crystal structure of related Ce 3 Co 4 Sn 13 [16].…”

Section: Introductionmentioning

confidence: 99%

Second-order charge-density-wave transition in single crystals of La3Co4Sn13

Welsch

Ramakrishnan

Eisele

et al. 2019

Phys. Rev. Materials

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“…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%

“…There has been only two types of structural transitions reported in the 3:4:13 systems related to the appearance of structural modulation with: (i) a single arm [63] or (ii) a whole k-star [59,64] of the same, single propagation vector k , , 0 1 2 1 2 = ( ) 9 . Transition temperatures associated with an appearance of the superstructure, commonly called T  , were usually lower than 150 K and could be suppressed to QCP by doping [8].…”

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

confidence: 99%

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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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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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Chiral crystal-structure transformation ofR3Co4Sn13(R=La and Ce)

Cited by 33 publications

References 34 publications

Second-order charge-density-wave transition in single crystals of La3Co4Sn13

Second-order charge-density-wave transition in single crystals of La3Co4Sn13

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

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Chiral crystal-structure transformation ofR3Co4Sn13(R=La and Ce)

Cited by 33 publications

References 34 publications

Second-order charge-density-wave transition in single crystals of La3Co4Sn13

Second-order charge-density-wave transition in single crystals of La3Co4Sn13

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

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Product

Resources

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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