Physics of Superconductivity and Magnetism
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Abstract
Abstract
Abstract Carbon-based materials provide a fertile ground for exploring emergent quantum phenomena. Recently, three-dimensional networks of ultrathin (3,0) and (2,1) carbon nanotubes (CNTs) confined in zeolite pores have been experimentally reported to exhibit room-temperature superconductivity. Given the instability of the (2,1) CNT, we perform first-principles calculations of superconductivity in (3,0) CNT. The predicted superconducting transition temperature ( T c ) of the pristine (3,0) CNT is 18.8 K, and Li doping further increases T c to 25.7 K. Remarkably, electron doping at 0.5 e/cell enhances the density of states and induces significant phonon softening, raising T c to 45.6 K, exceeding the McMillan limit and surpassing several reported CNT-based superconductors, although it still can not achieve the experimentally reported room-temperature superconductivity. This work advances understanding of superconductivity in one-dimensional carbon materials and suggests a route toward high- T c superconductivity in carbon nanostructures.
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@article{Qiao2026Electron,
title = {Electron-Doping-Enhanced High-temperature Superconductivity in (3,0) Carbon Nanotube},
author = {Shu‐Xiang Qiao and Yaping Li and Jin-Han Tan and Na Jiao and Mengmeng Zheng and Hong-Yan Lu and Ping Zhang},
journal = {Chinese Physics B},
year = {2026},
doi = {10.1088/1674-1056/aeb674},
url = {https://doi.org/10.1088/1674-1056/aeb674}
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