10 papers
Gaplessness from disorder and quantum geometry in gapped superconductors
Omri Lesser, Sagnik Banerjee, Xuepeng Wang +3
It is well known that disorder can induce low-energy Andreev bound states in a sign-changing, but fully gapped, superconductor at junctions. Generically, these excitations are…
Imaging propagating terahertz collective modes in two-dimensional semiconductor double layers
Andrew T. Pierce, Chirag Vaswani, Dimitri Pimenov +7
Two-dimensional transition metal dichalcogenide (TMD) semiconductors exhibit a wide range of novel phenomena at millielectronvolt (terahertz-frequency) energy scales, including sup…
Intertwined Orders, Quantum Criticality and Skyrmions in Tunable Topological Bands
Xuepeng Wang, Johannes S. Hofmann, Debanjan Chowdhury
Skyrmions are emergent many-body excitations that lie at the heart of both multi-component quantum Hall-like systems and deconfined quantum criticality. In a companion article (X.…
Low-energy optical absorption in correlated insulators: Projected sum rules and the role of quantum geometry
Dan Mao, Juan Felipe Mendez-Valderrama, Debanjan Chowdhury
Inspired by the discovery of a variety of correlated insulators in the moiré universe, controlled by interactions projected to a set of isolated bands with a narrow bandwidth, we…
Spin-Polaron Mediated Superconductivity in Doped Chern Antiferromagnets
Xuepeng Wang, J. F. Mendez-Valderrama, Johannes S. Hofmann +1
The study of interacting topological bands with a tunable bandwidth offers a unique platform to study the interplay of intertwined orders and emergent non-electronic excitations. H…
Theory of Correlated Insulators and Superconductor at in Twisted WSe
Sunghoon Kim, Juan Felipe Mendez-Valderrama, Xuepeng Wang +1
The observation of a superconducting phase, an intertwined insulating phase, and a continuous transition between the two at a commensurate filling of in bilayers of twisted…