TY - JOUR
T1 - Nematicity and competing orders in superconducting magic-angle graphene
AU - Cao, Yuan
AU - Rodan-Legrain, Daniel
AU - Park, Jeong Min
AU - Yuan, Noah F.Q.
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Fernandes, Rafael M.
AU - Fu, Liang
AU - Jarillo-Herrero, Pablo
N1 - Publisher Copyright:
© 2021 American Association for the Advancement of Science. All rights reserved.
PY - 2021/4/16
Y1 - 2021/4/16
N2 - Strongly interacting electrons in solid-state systems often display multiple broken symmetries in the ground state. The interplay between different order parameters can give rise to a rich phase diagram. We report on the identification of intertwined phases with broken rotational symmetry in magic-angle twisted bilayer graphene (TBG). Using transverse resistance measurements, we find a strongly anisotropic phase located in a “wedge” above the underdoped region of the superconducting dome. Upon its crossing with the superconducting dome, a reduction of the critical temperature is observed. Furthermore, the superconducting state exhibits an anisotropic response to a direction-dependent in-plane magnetic field, revealing nematic ordering across the entire superconducting dome. These results indicate that nematic fluctuations might play an important role in the low-temperature phases of magic-angle TBG.
AB - Strongly interacting electrons in solid-state systems often display multiple broken symmetries in the ground state. The interplay between different order parameters can give rise to a rich phase diagram. We report on the identification of intertwined phases with broken rotational symmetry in magic-angle twisted bilayer graphene (TBG). Using transverse resistance measurements, we find a strongly anisotropic phase located in a “wedge” above the underdoped region of the superconducting dome. Upon its crossing with the superconducting dome, a reduction of the critical temperature is observed. Furthermore, the superconducting state exhibits an anisotropic response to a direction-dependent in-plane magnetic field, revealing nematic ordering across the entire superconducting dome. These results indicate that nematic fluctuations might play an important role in the low-temperature phases of magic-angle TBG.
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U2 - 10.1126/science.abc2836
DO - 10.1126/science.abc2836
M3 - Article
C2 - 33859029
AN - SCOPUS:85104420380
SN - 0036-8075
VL - 372
SP - 264
EP - 271
JO - Science
JF - Science
IS - 6539
ER -