Searching for a higher superconducting transition temperature in strained MgB2
Jin-Cheng Zheng, Yimei Zhu
DOI 10.1103/PhysRevB.73.024509 · Physical Review B
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Abstract
We present a detailed first-principles density-functional analysis of the effects of lattice strain on the superconducting transition temperature, Tc, of MgB2, deriving a general rule that governs the enhancement (or suppression) of Tc in strained MgB2 in terms of electronic and phonon contributions. Based on the calculated structural, electronic, vibrational, and superconducting properties of a strained MgB2 superconductor, we show how a higher Tc might be achieved. Several candidate substrates are suggested for growing MgB2 thin films to gain a higher Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39.4 | Pressure not reported | unknown |
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