We gratefully acknowledge support from
the Simons Foundation and member institutions.
Full-text links:


Current browse context:

new | recent | 1501

Change to browse by:

References & Citations

Condensed Matter > Mesoscale and Nanoscale Physics

Title:Coexistence of Fermi arcs with two dimensional gapless Dirac states

Abstract: We present a physical scenario in which both Fermi arcs and two-dimensional gapless Dirac states coexist as boundary modes at the same two-dimensional surface. This situation is realized in topological insulator-Weyl semimetal interfaces in spite of explicit time reversal symmetry breaking. Based on a heuristic topological index, we predict that the coexistence is allowed when (i) the corresponding states of the Weyl semimetal and topological insulator occur at disconnected parts of the Brillouin zone separated by the Weyl nodes and (ii) the time-reversal breaking vector defining the Weyl semimetal has no projection parallel to the domain wall. This is corroborated by a numerical simulation of a tight binding model. We further calculate the optical conductivity of the coexisting interface states, which can be used to identify them through interference experiments.
Comments: 4+3 pages, 4 figures. Minor changes; version as published
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)
Journal reference: Phys. Rev. B 91, 121109 (R) (2015)
DOI: 10.1103/PhysRevB.91.121109
Cite as: arXiv:1501.00905 [cond-mat.mes-hall]
  (or arXiv:1501.00905v2 [cond-mat.mes-hall] for this version)

Submission history

From: Adolfo G. Grushin [view email]
[v1] Mon, 5 Jan 2015 16:06:18 UTC (1,001 KB)
[v2] Mon, 16 Mar 2015 17:12:25 UTC (1,001 KB)