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4 papers · 2 filters
Unusual negative formation enthalpies and atomic ordering in isovalent alloys of transition metal dichalcogenide monolayers
Ji-Hui Yang, Boris I. Yakobson
Common substitutional isovalent semiconductor alloys usually form disordered metastable phases with positive excess formation enthalpies (ΔH). In contrast, monolayer alloys of tran…
Unusual thickness dependence of exciton characteristics in 2D perovskite quantum wells
J. -C. Blancon, A. V. Stier, H. Tsai +12
Understanding the nature and energy distribution of optical resonances is of central importance in low-dimensional materials and its knowledge is critical for designing eff…
Two-dimensional Massless Dirac Fermions in Antiferromagnetic AFe2As2 (A = Ba, Sr)
Zhi-Guo Chen, Luyang Wang, Yu Song +7
We report infrared studies of AFeAs (A = Ba, Sr), two representative parent compounds of iron-arsenide superconductors, at magnetic fields (B) up to 17.5 T. Optical tra…
Design of Lead-Free Inorganic Halide Perovskites for Solar Cells via Cation-Transmutation
Xin-Gang Zhao, Ji-Hui Yang, Yuhao Fu +5
Hybrid organic-inorganic halide perovskites with the prototype material of CHNHPbI have recently attracted intense interest as low-cost and high-performance photo…