Distorted superconducting nodal line on a single Fermi surface in the anisotropic organic superconductor λ−(BETS)2GaCl4
Dita Puspita Sari, Retno Asih, Ko-ichi Hiraki, Takehito Nakano, Yasuo Nozue, Yasuyuki Ishii, Adrian D. Hillier, Isao Watanabe
DOI 10.1103/PhysRevB.104.224506 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The superconducting (SC) gap structure appearing in systems with single Fermi surface (FS) is generally described by the single gap function with s- or d-wave symmetry. The organic superconductor λ-(BETS)2GaCl4 [BETS = (CH2)2S2Se2C6Se2S2(CH2)2] endeavors to examine a novel SC gap structure on the distorted single cylindrical FS. Here, we show an example of the formation of the distorted SC nodal line by using the positive muon spin rotation (μ+SR) spectroscopy on λ-(BETS)2GaCl4. Our analysis method of the μ+SR data reveals that the nodal line has a narrower width than that of the traditional d-wave by the steepness factor of 4.6(2.1), and a flat part with the maximum gap exists. We found that the amplitude of the SC gap is 2Δ/kBTc = 3.9(2) and the in-plane penetration depth is λac(0) = 560(5) nm. Our present study gives insight into the relation of the FS distortion and the unusual Cooper pair formation mediated by the anisotropic spin fluctuations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| λ-(BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.5 | Pressure not reported | unknown |
| λ-(BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | Pressure unresolved | unknown |
| λ-(BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | Pressure unresolved | unknown |
| λ-(BETS)2GaCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.3 | Pressure unresolved | unknown |
| κ-(ET)2Cu2(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| λ-(BETS)2FeCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Magnetic field–temperature phase diagram of the quasi-two-dimensional organic superconductor λ−(BETS)2GaCl4 studied via thermal conductivity
similarity 0.95M. A. Tanatar et al.
Source status unknown — claims are unverified
Evidence of antiferromagnetic fluctuation in the unconventional superconductor λ-(BETS)2GaCl4 by C13 NMR
similarity 0.94T. Kobayashi & A. Kawamoto
Source status unknown — claims are unverified
Unconventional superconductivity in λ-(BETS)2GaCl4 probed by C13 NMR
similarity 0.94T. Kobayashi et al.
Source status unknown — claims are unverified
Superconductivity and vortex phases in the two-dimensional organic conductor λ−(BETS)2FexGa1−xCl4(x=0.45)
similarity 0.94S. Uji et al.
Source status unknown — claims are unverified
Superconducting phase diagram and FFLO signature in λ-(BETS)2GaCl4 from rf penetration depth measurements
similarity 0.94William A. Coniglio et al.
Source status unknown — claims are unverified
Fermi surface studies in the magnetic-field-induced superconductor λ−(BETS)2FeCl4
similarity 0.94S. Uji et al.
Source status unknown — claims are unverified