Superconductivity from Meissner Effect and Zero Resistivity in a Phenyl Molecule

Abstract

Recently, phenyl molecules have been reported to exhibit Meissner effect mainly from magnetization measurements. Realizing zero-resistivity state in these materials seems a challenge due to many practical difficulties but is required to characterize the existence of superconductivity. By choosing potassium-doped tris(2-methylphenyl)bismuthine as an example, we perform temperature-dependent magnetic susceptibility and resistivity measurements at different magnetic fields and pressures. The solid evidence for supporting superconductivity is achieved from the obtained Meissner effect and zero resistivity with the critical temperature ($T_c$) of 3.6 K at atmosphere pressure. Upon compression, we observe the gradual evolution of superconductivity from its initial phase with a parabolic behavior of $T_c$ to the second one with almost constant value of $T_c$ of 7 K. The 7 K phase seems a common feature for these newly discovered phenyl-based superconductors.

arXiv comment6 pages, 4 figures

References in corpus (10)

• Superconductivity at 5 K in potassium doped phenanthrene
• Magnetization of potassium doped p-terphenyl and p-quaterphenyl by high pressure synthesis
• Structural and bonding character of potassium-doped p-terphenyl superconductors
• Superconductivity above 120 kelvin in a chain link molecule
• Towards Novel Organic High-$T_{\mathrm{c}}$ Superconductors: Data Mining using Density of States Similarity Search
• Superconductivity at 43 K in a single C-C bond linked terphenyl
• Spectroscopic Evidence of Low Energy Gaps Persisting Towards 120 Kelvin in Surface-Doped p-Terphenyl Crystals
• Facile synthesis of potassium intercalated p-terphenyl and signatures of a possible high Tc phase
• Superconductivity in $p$-Terphenyl
• Observation of novel gapped phases in potassium doped single layer p-terphenyl on Au (111)