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- W2767334816 abstract "We have achieved a superconducting transition temperature (Tc) of 55 K in 27 at% B-doped Q-carbon. This value represents a significant improvement over previously reported Tc of 36 K in B-doped Q-carbon and is the highest Tc for conventional BCS (Bardeen–Cooper–Schrieffer) superconductivity in bulk carbon-based materials. The B-doped Q-carbon exhibits type-II superconducting characteristics with Hc2(0) ∼ 10.4 T, consistent with the BCS formalism. The B-doped Q-carbon is formed by nanosecond laser melting of B/C multilayered films in a super undercooled state and subsequent quenching. It is determined that ∼67% of the total boron exists with carbon in a sp3 hybridized state, which is responsible for the substantially enhanced Tc. Through the study of the vibrational modes, we deduce that higher density of states near the Fermi level and moderate to strong electron–phonon coupling lead to a high Tc of 55 K. With these results, we establish that heavy B doping in Q-carbon is the pathway for achieving high-temperature superconductivity." @default.
- W2767334816 created "2017-11-17" @default.
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- W2767334816 date "2017-11-10" @default.
- W2767334816 modified "2023-10-16" @default.
- W2767334816 title "Discovery of High-Temperature Superconductivity (<i>T</i><sub>c</sub> = 55 K) in B-Doped Q-Carbon" @default.
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- W2767334816 doi "https://doi.org/10.1021/acsnano.7b06888" @default.
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