Nematicity and competing orders in superconducting magic-angle graphene

doi:10.1126/science.abc2836

GSTDTAP > 气候变化

DOI	10.1126/science.abc2836
	Nematicity and competing orders in superconducting magic-angle graphene
	Yuan Cao; Daniel Rodan-Legrain; Jeong Min Park; Noah F. Q. Yuan; Kenji Watanabe; Takashi Taniguchi; Rafael M. Fernandes; Liang Fu; Pablo Jarillo-Herrero
	2021-04-16
发表期刊	Science
出版年	2021
英文摘要	Electrons in quantum materials can break rotational symmetry even when the underlying crystal lattice does not. This phenomenon, called nematicity, has been observed in many unconventional superconductors. Cao et al. found that magic-angle twisted bilayer graphene, in which superconductivity was recently discovered, also exhibits nematicity. The breaking of rotational symmetry was observed through transport measurements, which exhibited characteristic anisotropy. Science , this issue p. [264][1] 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. [1]: /lookup/doi/10.1126/science.abc2836
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/322893
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yuan Cao,Daniel Rodan-Legrain,Jeong Min Park,et al. Nematicity and competing orders in superconducting magic-angle graphene[J]. Science,2021.
APA	Yuan Cao.,Daniel Rodan-Legrain.,Jeong Min Park.,Noah F. Q. Yuan.,Kenji Watanabe.,...&Pablo Jarillo-Herrero.(2021).Nematicity and competing orders in superconducting magic-angle graphene.Science.
MLA	Yuan Cao,et al."Nematicity and competing orders in superconducting magic-angle graphene".Science (2021).