LaCo2B2: A Co-Based Layered Superconductor with a ThCr2Si2-Type Structure
Hiroshi Mizoguchi, Toshiaki Kuroda, Toshio Kamiya, Hideo Hosono
DOI 10.1103/PhysRevLett.106.237001 · Physical Review Letters
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
LaCo2B2 with a ThCr2Si2-type (so-called “122”) structure composed of alternately stacked La and CoB layers exhibits metallic electrical conductivity and Pauli paramagnetic behavior down to 2 K. Bulk superconductivity with a Tc of ∼4 K emerges upon substituting with dopant elements, i.e., isovalent substitution to form (La1−xYx)Co2B2, or aliovalent substitution to form La(Co1−xFex)2B2. According to the density functional theory calculations, highly covalent bonding between Co 3d dominating the Fermi level and B 2p levels deeper than the Fermi level removes magnetic ordering from Co 3d electrons even in the undoped samples. This is a first Co-based superconductor among the 122-type family.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaCo2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | onset |
| (La1-xYx)Co2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | onset |
| La(Co1-xFex)2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | onset |
| (La0.9Y0.1)Co2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.4 | Pressure not reported | onset |
| (La0.9Y0.1)Co2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.1 | Pressure not reported | zero_resistance |
| (La0.9Y0.1)Co2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | onset |
Similar papers
LaCo2B2: A Co-based layered superconductor with a ThCr2Si2-type structure
similarity 0.94Hiroshi Mizoguchi et al. · 2011 · arXiv:1103.0597
Source status unknown — claims are unverified
Angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2
similarity 0.92K. Nakayama et al.
Source status unknown — claims are unverified
Enhancement of superconductivity in La1−xSmxO0.5F0.5BiS2
similarity 0.91Y. Fang et al.
Source status unknown — claims are unverified
Crystal structure, lattice vibrations, and superconductivity of LaO1−xFxBiS2
similarity 0.91J. Lee et al.
Source status unknown — claims are unverified
Dimensional crossover in the electrical and magnetic properties of the layered LaSb2 superconductor under pressure: The role of phase fluctuations
similarity 0.91S. Guo et al.
Source status unknown — claims are unverified
Anomalous pressure dependence of the superconductivity in noncentrosymmetric LaNiC2: Evidence of strong electronic correlations
similarity 0.91Susumu Katano et al.
Source status unknown — claims are unverified