Coexistence of multiple charge-density waves and superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>SrPt</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mtext>As</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>revealed by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">As</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>75</mml:mn></mml:mrow></mml:mmultiscripts><mml:

Kawasaki, Shinji; Tani, Yoshihiko; Mabuchi, Tomosuke; Kudo, Kazuhiro; Nishikubo, Yoshihiro; Mitsuoka, Daisuke; Nohara, M.; 鄭, 国慶

doi:10.1103/physrevb.91.060510

Cited by 31 publications

(18 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gap-to-T c ratio, i.e., 2 0 /k B T c = 3.76, is comparable to the BCS value in the weak-coupling limit, 3.52. Our results are consistent with 75 As NQR measurements, where a clear Hebel-Slichter peak is seen below T c and the relaxation rate decreases exponentially, indicating a conventional BCS-type superconductivity [42]. It is noteworthy that there is no need to introduce an extra gap parameter to fit the λ −2 (T ) and σ (B) data.…”

Section: A Tf-μsr Experimentssupporting

confidence: 90%

“…Moreover, a rigorous analysis of the temperature-dependent specific heat suggests an (s + s)-wave gap symmetry at the Fermi surface and weak coupling, as in standard BCS superconductors [41]. Yet, recently, a single-gap s-wave symmetry was proposed based on the 1/T 1 relaxation rate obtained from the 75 As nuclear quadrupole resonance (NQR), which shows a clear Hebel-Slichter peak below T c and an exponential decrease at low temperatures [42]. To get more clarification on the superconducting order parameter, there is a clear call for a more comprehensive microscopic investigation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isotropic s -wave superconductivity in the noncentrosymmetric charge density wave superconductor SrPt2As2

et al. 2020

View full text Add to dashboard Cite

SrPt 2 As 2 undergoes a structural transition around 470 K (from a high-temperature tetragonal to a lowtemperature orthorhombic phase) accompanied by a charge density wave transition and followed by a superconducting transition at much lower temperature (5 K). The superconducting gap symmetry of this noncentrosymmetric compound was investigated in detail by means of muon-spin rotation or relaxation (μSR) experiments in transverse-field (TF) configuration. The temperature-dependent magnetic penetration depth obtained from the TF-μSR spectra suggests an isotropic s-wave-type superconducting gap. No observable differences are seen in the asymmetry time spectra collected in zero field above and below the superconducting transition temperature T c. This strongly suggests the absence of spontaneous magnetic fields in the superconducting state, hence pointing to a preserved time-reversal symmetry below T c .

show abstract

Section: A Tf-μsr Experimentssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Isotropic s -wave superconductivity in the noncentrosymmetric charge density wave superconductor SrPt2As2

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The ratio of Pt1 and Pt2 DOSs at E F is ~1.3. This value would be enhanced with the consideration of the additional CDW at 255 K, which occurs in [Pt2-As1-Pt2] layer22. This indicates that the [As2-Pt1-As2] layer is more susceptible to the emergence of the SC.…”

Section: Resultsmentioning

confidence: 99%

The mechanism of charge density wave in Pt-based layered superconductors: SrPt2As2 and LaPt2Si2

Kim

Min

2015

Sci Rep

View full text Add to dashboard Cite

The intriguing coexistence of the charge density wave (CDW) and superconductivity in SrPt2As2 and LaPt2Si2 has been investigated based on the ab initio density functional theory band structure and phonon calculations. We have found that the CDW instabilities for both cases arise from the q-dependent electron-phonon coupling with quasi-nesting feature of the Fermi surface. The band structure obtained by the band-unfolding technique reveals the sizable q-dependent electron-phonon coupling responsible for the CDW instability. The local split distortions of Pt atoms in the [As-Pt-As] layers play an essential role in driving the five-fold supercell CDW instability as well as the phonon softening instability in SrPt2As2. By contrast, the CDW and phonon softening instabilities in LaPt2Si2 occur without split distortions of Pt atoms. The phonon calculations suggest that the CDW and the superconductivity coexist in [X-Pt-X] layers (X = As or Si) for both cases.

show abstract

“…Coming back to the results of the spectra, when the modulation period of the electric field is larger than the lattice constant due to a CDW, there are two or more atoms feeling different EFGs within one period and the spectra should split or be broadened, like in SrPt 2 As 2 [25].…”

Section: Introductionmentioning

confidence: 96%

Charge fluctuations and nodeless superconductivity in quasi-one-dimensionalTa4Pd3Te16revealed byT

Jiao

Cao

et al. 2016

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Coexistence of multiple charge-density waves and superconductivity inSrPt2As2revealed byAs75

Cited by 31 publications

References 33 publications

Isotropic s -wave superconductivity in the noncentrosymmetric charge density wave superconductor SrPt2As2

Isotropic s -wave superconductivity in the noncentrosymmetric charge density wave superconductor SrPt2As2

The mechanism of charge density wave in Pt-based layered superconductors: SrPt2As2 and LaPt2Si2

Charge fluctuations and nodeless superconductivity in quasi-one-dimensionalTa4Pd3Te16revealed byT

Contact Info

Product

Resources

About