• 文献标题:   Spin magnetometry as a probe of stripe superconductivity in twisted bilayer graphene
  • 文献类型:   Article
  • 作  者:   KONIG EJ, COLEMAN P, TSVELIK AM
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Rutgers State Univ
  • 被引频次:   0
  • DOI:   10.1103/PhysRevB.102.104514
  • 出版年:   2020

▎ 摘  要

The discovery of alternating superconducting and insulating ground states in magic angle graphene has suggested an intriguing analogy with cuprate high-T-c materials. Here we argue that the network states of small angle twisted bilayer graphene (TBG) afford a further perspective on the cuprates by emulating their stripe-ordered phases, as in La1.875Ba0.125CuO4. We show that the spin and valley quantum numbers of stripes in TBG graphene fractionalize, developing characteristic signatures in the tunneling density of states and the magnetic noise spectrum of impurity spins. By examining the coupling between the charge rivers we determine the superconducting transition temperature. Our study suggests that twisted bilayer graphene can be used for a controlled emulation of stripe superconductivity and quantum sensing experiments of emergent anyonic excitations.