Structure Re-determination and Superconductivity Observation of Bulk 1T MoS2

Abstract

2H MoS2 has been intensively studied because of layer-dependent electronic structures and novel physical properties. Though the metastable 1T MoS2 with the [MoS6] octahedron was observed from the microscopic area, the true crystal structure of 1T phase has not been determined strictly. Moreover, the true physical properties have not been demonstrated from experiments due to the challenge for the preparation of pure 1T MoS2 crystals. Here, we successfully synthesized the 1T MoS2 single crystals and re-determined the crystal structure of 1T MoS2 from single-crystal X-ray diffraction. 1T MoS2 crystalizes in space group P-3m1 with a cell of a = b = 3.190(3) Å and c = 5.945(6) Å. The individual MoS2 layer consists of MoS6 octahedron sharing edge with each other. More surprisingly, the bulk 1T MoS2 crystals undergo a superconducting transition of Tc = 4 K, which is the first observation of superconductivity in pure 1T MoS2 phase.

References in corpus (1)

• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides

Cited by in corpus (6)

• Opportunities in Electrically Tunable 2D Materials Beyond Graphene: Recent Progress and Future Outlook
• Bridging the gap between atomically thin semiconductors and metal leads
• MSene: A new large family of two-dimensional transition metal sulfide with MXene structure
• Investigation of potassium-intercalated bulk MoS${}_2$ using transmission electron energy-loss spectroscopy
• Electron-Phonon Mediated Superconductivity in 1T MoS2 and Effect of Pressure on the Same
• Quantum loops in the 1T transition metal dichalcogenides