Anti-bonding mediated record low and comparable-to-air lattice thermal conductivity of two metallic crystals

Author:

Yang Zhonghua1ORCID,Ning Wenbo1,Rodriguez Alejandro2,Lu Lihua1,Wang Junxiang1,Yao Yagang3,Yuan Kunpeng4ORCID,Hu Ming2ORCID

Affiliation:

1. College of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, 110870, China

2. Department of Mechanical Engineering, University of South Carolina, Columbia, 29201, USA

3. National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

4. College of New Energy, China University of Petroleum (East China), Qingdao 266580, China

Abstract

PbAuGa and CsKNa possess record low lattice thermal conductivity which is even comparable to that of air. The loosely bonded Au and Cs atoms in PbAuGa and CsKNa respectively act as intrinsic rattlers and thus induce strong phonon anharmonicity.

Funder

China Postdoctoral Science Foundation

National Natural Science Foundation of China

Department of Education of Liaoning Province

National Science Foundation

Office of Experimental Program to Stimulate Competitive Research

Publisher

Royal Society of Chemistry (RSC)

Subject

Materials Chemistry,General Chemistry

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