Superconductivity and strong intrinsic defects in LaPd1−xBi2
Fei Han, Christos D. Malliakas, Constantinos C. Stoumpos, Mihai Sturza, Helmut Claus, Duck Young Chung, Mercouri G. Kanatzidis
DOI 10.1103/PhysRevB.88.144511 · Physical Review B
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Abstract
Two new phases LaPd1−xBi2 and CePd1−xBi2 were obtained by growing single crystals in Bi flux. They adopt the tetragonal ZrCuSi2-type structure and feature Bi-square nets and PbO-type PdBi layers with significant partial Pd occupancy. Bulk superconductivity at 2.1 K and metallic behavior above Tc are observed in LaPd1−xBi2. A small residual resistance ratio (RRR) indicates a strong scattering effect induced by the Pd vacancies, which implies an s-wave pairing symmetry in LaPd1−xBi2. The broadening of the resistivity transition was measured under different magnetic fields demonstrating a high upper critical field of 3 T. Hall effect measurements reveal dominantly electron-like charge carriers and single-band transport behavior in LaPd1−xBi2. The paramagnetic CePd1−xBi2 is nonsuperconducting but shows antiferromagnetic ordering below 6 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaPd0.85Bi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | zero_resistance |
| LaPd0.85Bi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | zero_resistance |
| CeNi1-xBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.2 | Pressure not reported | unknown |
| LaNi1-xBi2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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