Cited by 3,329Topological Materials and PhenomenaAdvanced Condensed Matter PhysicsQuantum and electron transport phenomena

Topological field theory of time-reversal invariant insulators

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Qi, Xiao-Liang, Hughes, Taylor L., Zhang, Shou-Cheng·2008·Physical Review B

Abstract

We show that the fundamental time-reversal invariant (TRI) insulator exists in $4+1$ dimensions, where the effective-field theory is described by the $(4+1)$-dimensional Chern-Simons theory and the topological properties of the electronic structure are classified by the second Chern number. These topological properties are the natural generalizations of the time reversal-breaking quantum Hall insulator in $2+1$ dimensions. The TRI quantum spin Hall insulator in $2+1$ dimensions and the topological insulator in $3+1$ dimensions can be obtained as descendants from the fundamental TRI insulator in $4+1$ dimensions through a dimensional reduction procedure. The effective topological field theory and the ${Z}_{2}$ topological classification for the TRI insulators in $2+1$ and $3+1$ dimensions are naturally obtained from this procedure. All physically measurable topological response functions of the TRI insulators are completely described by the effective topological field theory. Our effective topological field theory predicts a number of measurable phenomena, the most striking of which is the topological magnetoelectric effect, where an electric field generates a topological contribution to the magnetization in the same direction, with a universal constant of proportionality quantized in odd multiples of the fine-structure constant $\ensuremath{\alpha}={e}^{2}∕\ensuremath{\hbar}c$. Finally, we present a general classification of all topological insulators in various dimensions and describe them in terms of a unified topological Chern-Simons field theory in phase space.

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Crossref · 10.1103/physrevb.78.195424

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6 of 6 references verified0 citation errors · 0 not checkable

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  • Three-dimensional topological insulators are nonmagnetic insulators with novel surface states that are a consequence of the nontrivial topology of electronic wavefunctions in the bulk.

    “Topological insulators (TIs) in three dimensions are nonmagnetic insulators with novel surface states (SSs) that are a consequence of the nontrivial topology of electronic wavefunctions in the bulk of the materials ( 1-5 ).”
  • Spins tangentially arranged on such a circular Fermi surface lead to a Berry's phase of π, which is also a measure of the topological invariant and axion angle (ν0=1=θ/π) of the system.

    “Spins tangentially arranged on such a circular FS lead to a Berry's phase of π , which is also a measure of the topological invariant and the axion angle ( ν 0 = 1 = θ/π ) of the system ( 1, 4, 6 ).”
  • In the 'topological' limit where all occupied bands have the same energy -1 and all unoccupied bands have the same energy +1, the ordinary terms beyond the Berry phase disappear.

    “these 'ordinary' terms disappear in either the 'topological' limit of (70) where all occupied bands have the same energy -1 and all unoccupied bands have the same energy +1”

    From Three-Dimensional Topological Insulators (2011) · cites this paper as [70]

  • The three-dimensional topological insulator is connected to the orbital contribution to the magnetoelectric polarizability dP/dB.

    “The three-dimensional topological insulator turns out to be connected to a basic electromagnetic property of solids: the orbital contribution to the magnetoelectric polarizability dP/dB (70,71,72).”

    From Three-Dimensional Topological Insulators (2011) · cites this paper as [70]

  • A time-reversal breaking perturbation, such as magnetic impurities, can induce scattering between the states |k↑> and -|k↓> and open up a local energy gap at the Dirac point.

    “Theoretically, it was pointed out [5, 30, 31] that a time-reversal breaking perturbation, such as magnetic impurities, can induce scattering between the states | ⃗ k ↑〉 and -| ⃗ k ↓〉 and open up a local energy gap at the Dirac point.”

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Authors
Qi, X.-L., Hughes, T. L., & Zhang, S.-C.
Affiliations
Stanford University (US)
Venue
Physical Review B
Published
2008-11-24
Volume
78
Issue
19
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
OpenAlex
W1514707913
Cited by
3,329
References
6
Citations by year
2026: 98 · 2025: 157 · 2024: 161 · 2023: 183 · 2022: 213 · 2021: 253 · 2020: 282 · 2019: 201 · 2018: 191 · 2017: 178 · 2016: 237 · 2015: 202 · 2014: 194 · 2013: 210 · 2012: 212
FWCI
68.36
Type
journal article
Language
en
Open access
Locations
  • Physical Review B (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
  • arXiv (Cornell University)
  • Bulletin of the American Physical Society
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
Keywords
topological field theory, Chern-Simons theory, second Chern number, topological magnetoelectric effect, quantum spin Hall insulator, topological insulators, dimensional reduction, fine-structure constant

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