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\bibitem{Li_etal2020} {\textquotedblleft}\textit{Single-layer Janus black arsenic-phosphorus (b-AsP): optical dichroism, anisotropic vibrational, thermal, and elastic properties}{\textquotedblright}. Li LL, Bacaksiz C, Nakhaee M, Pentcheva R, Peeters FM, Yagmurcukardes M, Physical Review B \textbf{101}, 134102 (2020).   http://doi.org/10.1103/PHYSREVB.101.134102

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