Thermal conductivity and electrical transport properties of double-A-layer MAX phase Mo<sub>2</sub>Ga<sub>2</sub>C
Sen Jin, Taichao Su, Qianku Hu, Aiguo Zhou
Abstract
The present study reports the thermal conductivity and electrical transport properties of Mo2Ga2C, which is the first member of double-A-layer MAX phases. Dense bulk samples of Mo2Ga2C were prepared by vacuum hot pressing. At room temperature, the thermal conductivity was measured to be 14.8 ± 1.0 W/(m·K) and the electrical resistivity was 0.525 ± 0.052 µΩ·m. Mo2Ga2C follows the Wiedemann-Franz law and the Lorenz number is 2.22×10−8 WΩK−2. Mo2Ga2C is a superconductor with a transition temperature of ca. 5.1 K (±0.1%). The thermal conductivity and electrical resistivity are lower than those of most MAX phases probably due to the extra Ga layer.
Topics & Concepts
Electrical resistivity and conductivityMaterials scienceThermal conductivityWiedemann–Franz lawPhase (matter)SuperconductivityCondensed matter physicsAnalytical Chemistry (journal)Composite materialChemistryElectrical engineeringPhysicsOrganic chemistryEngineeringChromatographyMXene and MAX Phase Materials2D Materials and ApplicationsFerroelectric and Negative Capacitance Devices