What is recorded here?
Ghiotto, Wei, Song and colleagues mapped longitudinal and Hall transport in a 4.2-degree twisted bilayer WSe2 device. They found an enhanced low-field Hall response away from exact half filling, consistent with reconstructed small Fermi pockets. Near one hole per moiré cell, a low-field correlated insulator gave way to metallic transport around 5 T and a second insulating region above about 24 T. Temperature dependence, Hall sign changes and Landau-level trajectories motivated interpretations in terms of antiferromagnetic reconstruction and a high-field Ising excitonic insulator.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The observed contributions are finite-device transport patterns and fitted activation scales. Antiferromagnetic order, spin-density-wave structure and electron-hole binding are theoretical interpretations rather than direct measurements of the microscopic order. High-field Hall plateaus do not by themselves establish an exciton condensate, superfluidity or a uniquely identified topological excitonic phase. The entry follows the May 2024 preprint, including its two supplementary figures.
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People and systems
Augusto Ghiotto; LingNan Wei; Larry Song; Jiawei Zang; Aya Batoul Tazi; Daniel Ostrom; Kenji Watanabe; Takashi Taniguchi; James C. Hone; Daniel A. Rhodes; Andrew J. Millis; Cory R. Dean; Lei Wang; Abhay N. Pasupathy
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English catalogue narrative
Fermi-surface reconstruction and a high-field re-entrant insulator in twisted WSe2
Ghiotto, Wei, Song and colleagues mapped longitudinal and Hall transport in a 4.2-degree twisted bilayer WSe2 device. They found an enhanced low-field Hall response away from exact half filling, consistent with reconstructed small Fermi pockets. Near one hole per moiré cell, a low-field correlated insulator gave way to metallic transport around 5 T and a second insulating region above about 24 T. Temperature dependence, Hall sign changes and Landau-level trajectories motivated interpretations in terms of antiferromagnetic reconstruction and a high-field Ising excitonic insulator.
Scientific scope
The observed contributions are finite-device transport patterns and fitted activation scales. Antiferromagnetic order, spin-density-wave structure and electron-hole binding are theoretical interpretations rather than direct measurements of the microscopic order. High-field Hall plateaus do not by themselves establish an exciton condensate, superfluidity or a uniquely identified topological excitonic phase. The entry follows the May 2024 preprint, including its two supplementary figures.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Augusto Ghiotto; LingNan Wei; Larry Song; Jiawei Zang; Aya Batoul Tazi; Daniel Ostrom; Kenji Watanabe; Takashi Taniguchi; James C. Hone; Daniel A. Rhodes; Andrew J. Millis; Cory R. Dean; Lei Wang; Abhay N. Pasupathy
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.