University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China;
Center for Phononics and Thermal Energy Science China-EU Joint Center for Nanophononics School of Physics Science and Engineering Tongji University 200092 Shanghai 200092 China;
University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China;
Center for Phononics and Thermal Energy Science China-EU Joint Center for Nanophononics School of Physics Science and Engineering Tongji University 200092 Shanghai 200092 China;
University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China;
conductivity; polycrystalline; scattering;