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Multifunctional two-dimensional semiconductors SnP 3 : Universal mechanism of layer-dependent electronic phase transition
Gong P.-L.1; Zhang F.1; Huang L.-F.4; Zhang H.1; Li L.5; Xiao R.-C.2; Deng B.1; Pan H.3; Shi X.-Q.1
2018-10-31
Source PublicationJournal of Physics Condensed Matter
ISSN1361648X 09538984
Volume30Issue:47
AbstractTwo-dimensional (2D) semiconductors SnP are predicted, from first-principles calculations, to host moderate band gaps (0.72 eV for monolayer and 1.07 eV for bilayer), ultrahigh carrier mobility (∼10 cm V s for bilayer), strong absorption coefficients (∼10 cm ) and good stability. Moreover, the band gap can be modulated from an indirect character into a direct one via strain engineering. For experimental accessibility, the calculated exfoliation energies of monolayer and bilayer SnP are smaller than those of the common arsenic-type honeycomb structures GeP and InP . More importantly, a semiconductor-to-metal transition is discovered with the layer number N > 2. We demonstrate, in remarkable contrast to the previous understandings, that such phase transition is largely driven by the correlation between lone-pair electrons of interlayer Sn and P atoms. This mechanism is universal for analogues phase transitions in arsenic-type honeycomb structures (GeP , InP and SnP ).
Keywordlone-pair electrons metal-to-semiconductor transition two-dimensional SnP 3
DOI10.1088/1361-648X/aae61b
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Southern University of Science and Technology
2.Institute of Solid State Physics Chinese Academy of Sciences
3.Universidade de Macau
4.Northwestern University
5.Anhui University
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GB/T 7714
Gong P.-L.,Zhang F.,Huang L.-F.,et al. Multifunctional two-dimensional semiconductors SnP 3 : Universal mechanism of layer-dependent electronic phase transition[J]. Journal of Physics Condensed Matter,2018,30(47).
APA Gong P.-L..,Zhang F..,Huang L.-F..,Zhang H..,Li L..,...&Shi X.-Q..(2018).Multifunctional two-dimensional semiconductors SnP 3 : Universal mechanism of layer-dependent electronic phase transition.Journal of Physics Condensed Matter,30(47).
MLA Gong P.-L.,et al."Multifunctional two-dimensional semiconductors SnP 3 : Universal mechanism of layer-dependent electronic phase transition".Journal of Physics Condensed Matter 30.47(2018).
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