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- W4327940023 abstract "In the extreme quantum-limit states under high magnetic fields, enhanced electronic correlation effects can stabilize anomalous quantum states. Using band-tuning with a magnetic field, we realized a spin-polarized quantum-limit state in the field-induced semimetallic phase of a topological insulator ${mathrm{Bi}}_{1text{ensuremath{-}}x}{mathrm{Sb}}_{x}$. Further increase in the field injects more electrons and holes to this state and results in an unexpected reentrant insulator state in this topological semimetallic state. A single-particle picture cannot explain this reentrant insulator state, reminiscent of phase transitions due to many-body effects. Estimates of the binding energy and spacing of electron-hole pairs and the thermal de Broglie wavelength indicate that ${mathrm{Bi}}_{1text{ensuremath{-}}x}{mathrm{Sb}}_{x}$ may host the excitonic insulator phase in this extreme environment." @default.
- W4327940023 created "2023-03-21" @default.
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- W4327940023 date "2023-03-20" @default.
- W4327940023 modified "2023-10-14" @default.
- W4327940023 title "Field-induced reentrant insulator state of a gap-closed topological insulator ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mtext>−</mml:mtext><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mi>x</mml:mi></mml:msub></mml:mrow></mml:math> ) in quantum-limit states" @default.
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- W4327940023 doi "https://doi.org/10.1103/physrevb.107.125140" @default.
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