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- W2963297771 abstract "We report electrical transport measurements on ${mathrm{CaMn}}_{2}{mathrm{Bi}}_{2}$ single crystals under applied pressure. At ambient pressure and high temperatures, ${mathrm{CaMn}}_{2}{mathrm{Bi}}_{2}$ behaves as a single-band semimetal hosting N'eel order at ${T}_{N}=150$ K. At low temperatures, multiband behavior emerges along with an activated behavior typical of degenerate semiconductors. The activation gap is estimated to be $mathrm{ensuremath{Delta}}ensuremath{sim}20$ K. Applied pressure not only favors the antiferromagnetic order at a rate of 0.40(2) K/kbar, but it also enhances the activation gap at 20 kbar by about 70%. This gap enhancement is typical of correlated narrow-gap semiconductors such as FeSi and ${mathrm{Ce}}_{3}{mathrm{Bi}}_{4}{mathrm{Pt}}_{3}$, and it places ${mathrm{CaMn}}_{2}{mathrm{Bi}}_{2}$ as a Mn-based hybridization-gap semiconductor candidate. Ab initio calculations based on density functional theory are shown to be insufficient to describe the ground state of ${mathrm{CaMn}}_{2}{mathrm{Bi}}_{2}$." @default.
- W2963297771 created "2019-07-30" @default.
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- W2963297771 date "2019-07-08" @default.
- W2963297771 modified "2023-10-18" @default.
- W2963297771 title "Putative hybridization gap in CaMn2Bi2 under applied pressure" @default.
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- W2963297771 doi "https://doi.org/10.1103/physrevb.100.045108" @default.
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