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- W4385967964 abstract "Bernal bilayer graphene has recently been discovered to exhibit a wide range of unique ordered phases resulting from interaction-driven effects and encompassing spin and valley magnetism, correlated insulators, correlated metals, and superconductivity. This letter reports on a novel family of correlated phases characterized by spin and valley ordering, observed in electron-doped bilayer graphene. The novel correlated phases demonstrate an intriguing non-linear current-bias behavior at ultralow currents that is sensitive to the onset of the phases and is accompanied by an insulating temperature dependence, providing strong evidence for the presence of unconventional charge carrying degrees of freedom originating from ordering. These characteristics cannot be solely attributed to any of the previously reported phases, and are qualitatively different from the behavior seen previously on the hole-doped side. Instead, our observations align with the presence of charge- or spin-density-waves state that open a gap on a portion of the Fermi surface or fully gapped Wigner crystals. The resulting new phases, quasi-insulators in which part of the Fermi surface remains intact or valley-polarized and valley-unpolarized Wigner crystals, coexist with previously known Stoner phases, resulting in an exceptionally intricate phase diagram." @default.
- W4385967964 created "2023-08-19" @default.
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- W4385967964 date "2023-08-01" @default.
- W4385967964 modified "2023-09-23" @default.
- W4385967964 title "Interaction-driven (quasi-) insulating ground states of gapped electron-doped bilayer graphene" @default.
- W4385967964 doi "https://doi.org/10.48550/arxiv.2308.00827" @default.
- W4385967964 hasPublicationYear "2023" @default.
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