150 citations · 576 across the 17 of their papers we have counts for
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Quantum Phase Transitions and Fractional Quantized Anomalous Hall Insulators in Rhombohedral Graphene
Zach Hadjri, Xinlei Yue, Tonghang Han +10
Fractional quantum anomalous Hall effect (FQAHE) has been discovered in twisted MoTe and rhombohedral graphene/hBN moiré superlattices. Such van der Waals heterostructures feat…
Thermodynamic evidence for interaction-driven first-order topological quantum phase transitions
Surajit Dutta, Nadav Auerbach, Chiho Yoon +12
Topological quantum phase transitions in non interacting systems occur through continuous gap closing and reopening. In strongly interacting systems, however, competing ordered sta…
1/3 Fractional and Gapless Integer Quantum Anomalous Hall States in Rhombohedral Graphene
Jackson P. Butler, Tonghang Han, Andrew DiFabbio +6
The fractional quantum anomalous Hall (FQAH) effect occurs in moiré superlattices in both twisted bilayer MoTe and rhombohedral -layer graphene aligned to hexagonal boron ni…
Reconfigurable chiral superconductivity
Surajit Dutta, Nadav Auerbach, Tonghang Han +9
Rhombohedral multilayer graphene at high displacement fields hosts superconductivity emerging from a spin valley polarized quarter metal, with transport signatures suggestive of ti…
Evidence of Metallic Wigner Crystal in Rhombohedral Graphene
Tonghang Han, Jackson P. Butler, Shenyong Ye +15
When the Coulomb interaction dominates over kinetic energy, electrons can crystallize into a Wigner crystal (WC). This paradigmatic correlated electronic phase has been realized in…
Family of Unconventional Superconductivities in Crystalline Graphene
Junseok Seo, Armel A. Cotten, Mingchi Xu +17
Unconventional superconductors exhibit multiple broken symmetries and exceed the range of the Bardeen-Cooper-Schrieffer (BCS) theory. For instance, time-reversal symmetry can be br…
On-Chip Terahertz Spectroscopy for Dual-Gated van der Waals Heterostructures at Cryogenic Temperatures
Junseok Seo, Zhengguang Lu, Seunghyun Park +10
Van der Waals heterostructures have emerged as a versatile platform to study correlated and topological electron physics. Spectroscopy experiments in the THz regime are crucial, si…
Displacement field-controlled fractional Chern insulators and charge density waves in a graphene/hBN moiré superlattice
Samuel H. Aronson, Tonghang Han, Zhengguang Lu +5
Rhombohedral multilayer graphene, with its flat electronic bands and concentrated Berry curvature, is a promising material for the realization of correlated topological phases of m…
Extended Quantum Anomalous Hall States in Graphene/hBN Moiré Superlattices
Zhengguang Lu, Tonghang Han, Yuxuan Yao +7
Electrons in topological flat bands can form novel topological states driven by the correlation effects. The penta-layer rhombohedral graphene/hBN moire superlattice has been shown…
Signatures of Chiral Superconductivity in Rhombohedral Graphene
Tonghang Han, Zhengguang Lu, Zach Hadjri +20
Chiral superconductors are unconventional superconducting states that break time reversal symmetry spontaneously and typically feature Cooper pairing at non-zero angular momentum.…
Large Quantum Anomalous Hall Effect in Spin-Orbit Proximitized Rhombohedral Graphene
Tonghang Han, Zhengguang Lu, Yuxuan Yao +8
The quantum anomalous Hall effect (QAHE) is a robust topological phenomenon featuring quantized Hall resistance at zero magnetic field. We report the QAHE in a rhombohedral pentala…
Orbital Multiferroicity in Pentalayer Rhombohedral Graphene
Tonghang Han, Zhengguang Lu, Giovanni Scuri +8
Ferroic orders describe spontaneous polarization of spin, charge, and lattice degrees of freedom in materials. Materials featuring multiple ferroic orders, known as multiferroics,…
Fractional Quantum Anomalous Hall Effect in a Graphene Moire Superlattice
Zhengguang Lu, Tonghang Han, Yuxuan Yao +7
The fractional quantum anomalous Hall effect (FQAHE), the analog of the fractional quantum Hall effect1 at zero magnetic field, is predicted to exist in topological flat bands unde…
Correlated Insulator and Chern Insulators in Pentalayer Rhombohedral Stacked Graphene
Tonghang Han, Zhengguang Lu, Giovanni Scuri +7
Rhombohedral stacked multilayer graphene is an ideal platform to search for correlated electron phenomena, due to its pair of flat bands touching at zero energy and further tunabil…