Anomalous Lattice Thermal Conductivity in Rocksalt IIA-VIA Compounds

• Published in: arXiv.org
• Main Authors: Rakesh Roshan, S C, Yedukondalu, N, Rajmohan Muthaiah, Lavanya, K, Anees, P, R Rakesh Kumar, Rao, T Venkatappa, Ehm, Lars, Parise, John B
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 26.10.2021
• Subjects: Acoustics; Atomic properties; Barium oxides; Barium sulfides; Energy conversion; Ferroelectricity; Heat conductivity; Heat transfer; Lattice vibration; Lead tellurides; Phonons; Scattering; Softening; Tensile strain; Thermal conductivity; Transport properties

Materials with an intrinsic (ultra)low lattice thermal conductivity (k\(_L\)) are critically important for the development of efficient energy conversion devices. In the present work, we have investigated microscopic origins of low k\(_L\) behavior in BaO, BaS and MgTe by exploring lattice dynamics...