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Emergence of excitonic superfluid at topological-insulator surfaces
Yasen Hou, Rui Wang, Rui Xiao +11
Excitons are spin integer particles that are predicted to condense into a coherent quantum state at sufficiently low temperature, and exciton condensates can be realized at much hi…
Microscopy of hydrogen and hydrogen-vacancy defect structures on graphene devices
Dillon Wong, Yang Wang, Wuwei Jin +8
We have used scanning tunneling microscopy (STM) to investigate two types of hydrogen defect structures on monolayer graphene supported by hexagonal boron nitride (h-BN) in a gated…
Intrinsic Insulating Ground State in Transition Metal Dichalcogenide TiSe2
Daniel J. Campbell, Chris Eckberg, Peter Y. Zavalij +8
The transition metal dichalcogenide TiSe has received significant research attention over the past four decades. Different studies have presented ways to suppress the 200~K cha…
Emergence of a Metal-Insulator Transition and High Temperature Charge Density Waves in VSe2 at the Monolayer Limit
Ganbat Duvjir, Byoung Ki Choi, Iksu Jang +13
Emergent phenomena driven by electronic reconstructions in oxide heterostructures have been intensively discussed. However, the role of these phenomena in shaping the electronic pr…
Electronic Structure of Exfoliated and Epitaxial Hexagonal Boron Nitride
Roland J. Koch, Jyoti Katoch, Simon Moser +6
Hexagonal boron nitride (hBN) is an essential component in van der Waals heterostructures as it provides high quality and weakly interacting interfaces that preserve the electronic…
Orbital Fingerprint of Topological Fermi Arcs in a Weyl Semimetal
Chul-Hee Min, Hendrik Bentmann, Jennifer N. Neu +15
The monopnictides TaAs and TaP are well-established Weyl semimetals. Yet, a precise assignment of Fermi arcs, accomodating the predicted chiral charge of the bulk Weyl points, has…