...
机译:Complex energy plane and topological invariant in non-Hermitian systems
Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Peoples R China;
Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Peoples R China|Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Peoples R China|Sun Yat Sen Univ, Guangdong Prov Key Lab Display Mat & Technol, Guangzhou 510275, Peoples R China;