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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-9215
DTSTART:20250522T150000Z
DTEND:20250522T160000Z
DTSTAMP:20260413T151508Z
LAST-MODIFIED:20250519T143053Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Revisiting the electron gas in the era of 2D materials\, R. G.
  Herb Condensed Matter Seminar\, Miguel Morales\, Center for Computati
 onal Quantum Physics\, Flatiron Institute
DESCRIPTION:Recent advances in two-dimensional (2D) and layered materi
 als have catalyzed significant interest in the study of electrons in r
 educed dimensions. The discovery of exotic electronic phases in twiste
 d bilayer graphene and transition metal dichalcogenide (TMD) bilayers 
 has renewed focus on the properties of the 2D electron gas\, which und
 erpins most continuum Hamiltonians modeling these systems.
\n
\nIn thi
 s talk I will present our recent efforts to explore 2D electron gases 
 in the presence of Moire potentials\, electron doping\, gate screening
  and impurities. We employ variational and diffusion Monte Carlo metho
 ds to obtain accurate ground-state properties in parameter regimes tha
 t remain challenging for conventional numerical techniques. By leverag
 ing novel real-space neural quantum states\, the study achieves state-
 of-the-art accuracy in mapping the phase diagram of the homogeneous 2D
  electron gas. This approach yields an updated determination of the Wi
 gner transition and reveals previously unrecognized nematic spin corre
 lations across a broad density range in the liquid phase.
\n
\nAdditio
 nally\, the phase diagram of the Moiré Continuum Hamiltonian\, partic
 ularly for TMD heterobilayers\, is investigated. The analysis characte
 rizes the emergence of multiple magnetic orders as functions of electr
 on density and Moiré potential depth\, alongside corresponding change
 s in spatial correlations. Recent efforts also explore the effects of 
 doping and impurity-induced electron localization in Moiré materials.
URL:https://www.physics.wisc.edu/events/?id=9215
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