Ultralow Lattice Thermal Conductivity in Two-Dimensional Zintl CaZn₂Sb₂: Phonon Softening, Anharmonicity and Four-phonon Scattering
Zintl compounds have attracted increasing interest in thermoelectric applications because their bonding complexity and structural softness can favor intrinsically low lattice thermal conductivity. Here, the electronic band structure, mechanical properties, lattice dynamics, and intrinsic lattice thermal transport of...