Emergence of Interlayer Coherence in Twist-Controlled Graphene Double Layers

Date

2022-10-24

Authors

Lin, Kenneth A.
Prasad, Nitin
Burg, G. William
Zou, Bo
Ueno, Keiji
Watanabe, Kenji
Taniguchi, Takashi
MacDonald, Allan H.
Tutuc, Emanuel

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Abstract

We report enhanced interlayer tunneling with reduced linewidth at zero interlayer bias in a twist- controlled double monolayer graphene heterostructure in the quantum Hall regime, when the top (νT) and bottom (νB) layer filling factors are near νT = ±1/2, ±3/2 and νB = ±1/2, ±3/2, and the total filling factor ν = ±1 or ±3. The zero-bias interlayer conductance peaks are stable against variations of layer filling factor, and signal the emergence of interlayer phase coherence. Our results highlight twist-control as a key attribute in revealing interlayer coherence using tunneling.

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