The work was supported by the National Key R&D Program of China(2019YFA0708200);the National Natural Science Foundation of China(T2188101,52125307,52021006 and 12074369);the“2011 Program”from the Peking-Tsinghua-IOP Collaborative Innovation Center of Quantum Matter,Youth Innovation Promotion Association,CAS;the Youth Supporting Program of Institute of Semiconductors.
Heteroepitaxy can reduce the cost and widen the application range of semiconductor film synthesis and device fabrication.However,the lattice and thermal expansion coefficient mismatches between epilayers and substrate...
supported by the Guangdong Basic and Applied Basic Research Foundation(2020B1515120067);the Hong Kong Research Grants Council under the Collaborative Research Fund(CRF-C6016-20G and CRF-C6021-19EF);the Fundamental Research Funds for the Central Universities(xxj032021001);the Key R&D Project of Shaanxi Province(2022GY-400);the National Natural Science Foundation of China(12274336).
The strengthσ_(y)(D)of a polycrystal can decrease or increase with the grain diameter D,i.e.,the famous Hall-Petch(HP)and inverse-Hall-Petch(IHP)behaviors,respectively.However,σ_(y)(D)under thick grain boundaries(GB...