Ultrahigh <i>zT</i> from strong electron–phonon interactions and a low-dimensional Fermi surface
V.K. Ranganayakulu, Te‐Hsien Wang, Cheng‐Lung Chen, Angus Huang, Ma‐Hsuan Ma, Chun‐Min Wu, Wei-Han Tsai, Tsu‐Lien Hung, Min‐Nan Ou, Horng‐Tay Jeng, Chih‐Hao Lee, K.H. Chen, Wen‐Hsien Li, Madison K. Brod, G. Jeffrey Snyder, Yang-Yuan Chen
Abstract
An ultrahigh zT of 2.7 at 700 K is achieved in a (Ge 0.86 Sb 0.08 Bi 0.06 )Te single crystal. This outstanding performance is attributed to one-dimensional-like electronic structure and the resulting strong electron–phonon interaction.
Topics & Concepts
Condensed matter physicsPhysicsFermi surfaceFermi Gamma-ray Space TelescopePhononElectronQuantum mechanicsSuperconductivityAdvanced Thermoelectric Materials and DevicesElectronic and Structural Properties of OxidesMagnetic and transport properties of perovskites and related materials