Pristine and pseudogapped boundaries of deconfined quantum critical points
Source abstract
Abstract
Bulk topology and criticality can each give rise to nontrivial boundary phenomena. This work shows that their interplay, at unconventional quantum critical points between a quantum spin Hall insulator and a superconductor, produces an unexpectedly rich landscape of edge states. In addition to the usual quantum spin Hall edge modes, the authors identify novel ``pseudogapped'' chiral fermions, characterized by a strongly suppressed spectral function and super--power-law decay of the Green's function.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Topological Materials and Phenomena · Quantum and electron transport phenomena · Physics of Superconductivity and Magnetism
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of California, Santa Barbara
University of Chicago
Funding
Simons Foundation · National Science Foundation · Kavli Institute for Theoretical Physics, University of California, Santa Barbara
References (73)
Show source-provided references
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58. See Supplemental Material at http://link.aps.org/supplemental/10.1103/4gnw-4ljj for details in which we first review the extraordinary-log boundary phase of the 3dO(N) model. Afterwards, we discuss further details of the parton construction discussed in the main text and derive the Green's functions and spectral functions for both the pseudogapped boundary and pristine boundary fermions. Lastly, we remark on a quantum information perspective of our work, and how the problems discussed in the main text can be realized by weak measurement.
59. The term “pseudogap” is used here as a concise description of the behavior of the local spectral function and Green's function, and should not be confused with the pseudogap phase in cuprate superconductors.
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