Superconductivity in molecule-intercalated LixZrNCl with variable interlayer spacing
Yuichi Kasahara, Tsukasa Kishiume, Katsuki Kobayashi, Yasujiro Taguchi, Yoshihiro Iwasa
DOI 10.1103/PhysRevB.82.054504 · 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
Specific heat has been investigated in electron-doped LixMyZrNCl superconductors, in which interlayer spacing d can be controlled by the intercalation of organic molecules M. It has been revealed that, upon enlargement of d by molecule cointercalation, Tc is enhanced concomitantly with the superconducting coupling strength whereas the density of states at the Fermi level is kept almost constant. Structural and spectroscopic analysis proved that the molecules are intercalated without affecting electronic nor vibrational states, simply increasing the interlayer spacing. These results lead us to conclude that the enhancement of Tc is ascribed to the improvement of two dimensionality, which is consistent with a recent theory that discussed superconductivity in a band insulator on a honeycomb lattice with disconnected Fermi surfaces.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LixZrNCl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15 | Pressure not reported | onset |
| LixZrNCl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.2 | Pressure not reported | onset |
| LixZrNCl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.2 | Pressure not reported | unknown |
| Lix(THF)yHfNCl Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25.5 | Pressure not reported | unknown |
Similar papers
Modulation-doped-semiconductorlike behavior manifested in magnetotransport measurements of LixZrNCl layered superconductors
similarity 0.96T. Takano et al.
Source status unknown — claims are unverified
Anisotropic superconducting order parameter in Li-intercalated layered superconductor LixZrNCl
similarity 0.96M. Hiraishi et al.
Source status unknown — claims are unverified
Increase in Tc upon Reduction of Doping in LixZrNCl Superconductors
similarity 0.96Y. Taguchi et al.
Source status unknown — claims are unverified
Universal Increase in the Superconducting Critical Temperature of Two-Dimensional Semiconductors at Low Doping by the Electron-Electron Interaction
similarity 0.95Matteo Calandra et al.
Source status unknown — claims are unverified
Enhancement of Pairing Interaction and Magnetic Fluctuations toward a Band Insulator in an Electron-Doped LixZrNCl Superconductor
similarity 0.95Yuichi Kasahara et al.
Source status unknown — claims are unverified
Lattice dynamics of superconducting zirconium and hafnium nitride halides
similarity 0.94A. Cros et al.
Source status unknown — claims are unverified