The transformation of digital computers from bulky machines to portable systems has been
enabled by new materials and advanced processing technologies that allow ultrahigh …

Realizing the full potential of any materials system requires understanding and controlling
disorder, which can obscure intrinsic properties and hinder device performance. Here we …

Materials with flat electronic bands often exhibit exotic quantum phenomena owing to strong
correlations. An isolated low-energy flat band can be induced in bilayer graphene by simply …

When two sheets of graphene are stacked at a small twist angle, the resulting flat
superlattice minibands are expected to strongly enhance electron-electron interactions …

The quantum anomalous Hall (QAH) effect combines topology and magnetism to produce
precisely quantized Hall resistance at zero magnetic field. We report the observation of a …

Electron correlation and topology are two central threads of modern condensed matter
physics. Semiconductor moiré materials provide a highly tuneable platform for studies of …

In conventional superconductors, Cooper pairing occurs between electrons of opposite spin.
We observe spin-polarized superconductivity in Bernal bilayer graphene when doped to a …

In the presence of a large perpendicular electric field, Bernal-stacked bilayer graphene
(BLG) features several broken-symmetry metallic phases,–as well as magnetic-field-induced …

Twisted bilayer graphene with a twist angle of around 1.1° features a pair of isolated flat
electronic bands and forms a platform for investigating strongly correlated electrons. Here …

Understanding the mechanism of high-transition-temperature (high-T c) superconductivity is
a central problem in condensed matter physics. It is often speculated that high-T c …