Pressure-induced superconducting state and effective mass enhancement near the antiferromagnetic quantum critical point of CePt2In7
E. D. Bauer, H. O. Lee, V. A. Sidorov, N. Kurita, K. Gofryk, J.-X. Zhu, F. Ronning, R. Movshovich, J. D. Thompson, Tuson Park
DOI 10.1103/PhysRevB.81.180507 · Physical Review B
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Abstract
The heavy-fermion antiferromagnet CePt2In7 is a new, structurally more two-dimensional member of the CemMnIn3m+2n family. Applying pressure to CePt2In7 induces a broad dome of superconductivity that coexists with magnetic order for 1≤P≤3 GPa. The maximum Tc=2.1 K appears near the critical pressure Pc=3.5 GPa where the Néel temperature extrapolates to zero temperature. An analysis of the initial slope of the upper critical field, the T2 coefficient of the electrical resistivity, and specific heat indicates an enhancement of the effective mass m∗ as Pc is approached, suggesting that critical fluctuations may mediate superconductivity. Electronic-structure calculations reveal a delicate balance between structural anisotropy and f−d hybridization, which may account for comparable Tc’s in CePt2In7 and more three-dimensional CeRhIn5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CePt2In7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | 3.5 GPa | unknown |
| CePt2In7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | 3.5 GPa | unknown |
| CeRhIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.1 | Pressure not reported | unknown |
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure not reported | unknown |
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