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Valley-Selective Transport through Structural Domain Walls in Rhombohedral Graphene Quarter Metals
Vo Tien Phong, Pablo San-Jose, Bing Cheng +6
Domain walls separating quarter metals with opposite valley polarizations have recently been imaged in rhombohedral graphene multilayers. Depending on their formation mechanism, th…
High Order Geometric Channels for Nonlinear Transport in Bloch Bands
Sami Farrag, Eugene Mele, Tony Low
We develop a geometric perturbation theory of Bloch states for perturbations coupling via the interband Berry connection. The gauge-invariant Bargmann trace builds the dressed disp…
Gyrotropy from Extrinsic Geometry in Twisted Materials
Spenser Talkington, Eugene J Mele
Gyrotropy in twisted bilayer graphene can be used as a signature of interlayer electronic coupling. Gyrotropy can emerge in the absence of interlayer coupling in time-reversal symm…
Axionic tunneling from a topological Kondo insulator
Saikat Banerjee, Anuva Aishwarya, Fei Liu +4
Discoveries over the past two decades have revealed the remarkable ability of quantum materials to emulate relativistic properties of the vacuum, from Dirac cones in graphene to Di…
Terahertz Landau level spectroscopy of Dirac fermions in millimeter-scale twisted bilayer graphene
Benjamin F. Mead, Spenser Talkington, An-Hsi Chen +8
Exotic electronic physics including correlated insulating states and fractional Chern insulators have been observed in twisted bilayer graphene in a magnetic field when the Fermi v…