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• W3208389925 abstract "The target of valleytronics developments is to manipulate the valley degree of freedom and utilize it in microelectronics as charge and spin degrees of freedom. Based on first-principles calculations, we demonstrate that $M{mathrm{Br}}_{2}$ $(M=mathrm{Ru},phantom{rule{4pt}{0ex}}mathrm{Os})$ monolayers are intrinsically ferrovalley materials with large valley polarization up to 530 meV. Compressive strain can induce phase transitions in the materials from ferrovalley insulators to complete valley-polarized metals, called half-valley metals, in analogy to the concept of half metals in spintronics. With the increase of the strain, the materials become Chern insulators, whose edge states are chiral-spin-valley locking. The phase transition is caused by sequent band inversions of the ${d}_{xy}/{d}_{{x}^{2}ensuremath{-}{y}^{2}}$ and ${d}_{{z}^{2}}$ orbitals at $Kensuremath{-}$ and $K+$ valleys, analyzed based on a strained $mathbit{k}ifmmodecdotelsetextperiodcenteredfi{}mathbit{p}$ model. Our work provides a pathway for carrying out low-dissipation electronics devices with complete spin and valley polarizations." @default.
• W3208389925 created "2021-11-08" @default.
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• W3208389925 date "2021-10-28" @default.
• W3208389925 modified "2023-10-17" @default.
• W3208389925 title "Strain-induced half-valley metals and topological phase transitions in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>M</mml:mi><mml:msub><mml:mi>Br</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> monolayers <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>(</mml:mo><mml:mi>M</mml:mi><mml:mo>=</mml:mo><mml:mi>Ru</mml:mi><mml:mo>,</mml:mo><mml:mspace width=4pt /><mml:mi>Os</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>" @default.
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• W3208389925 doi "https://doi.org/10.1103/physrevb.104.165427" @default.
• W3208389925 hasPublicationYear "2021" @default.
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