In condensed matter physics, the Su–Schrieffer–Heeger (SSH) model or SSH chain is a one-dimensional lattice model that presents topological features. [1] It was devised by Wu-Pei Su, John Robert Schrieffer , and Alan J. Heeger in 1979, to describe the increase of electrical conductivity of polyacetylene polymer chain when doped, based on ...

The Su-Schrieffer–Heeger (SSH) model¶ The simplest non-trivial topology : 1-d lattice. Peierls instability makes the atoms dimerize.

Jun 20, 2019 · Here we give a concise description of the SSH model along with a brief review of the background physics and attempt to understand the ideas of topological invariants, edge states, and bulk-boundary correspondence using the model.

We study the Hubbard model on the square lattice coupled in addition to the optical Su-Schrieffer- Heeger (SSH) phonons, using the singular-mode functional renormalization group method. At

We take a hands-on approach and get to know the basic concepts of topological insulators via a concrete system: the Su-Schrieffer-Heeger (SSH) model describes spinless fermions hopping on a one-dimensional lattice with staggered hopping am-plitudes.

Jun 14, 2018 · The Su-Schrieffer-Heeger (SHH) model is often invoked as a protoypical topological insulator in 1D that carries localized zero modes at the edge. In every single treatment I could find, people compute winding numbers or Zak phases that can have one of …

Feb 23, 2016 · We take a hands-on approach and get to know the basic concepts of topological insulators via a concrete system: the Su-Schrieffer-Heeger (SSH) model describes spinless fermions hopping on a one-dimensional lattice with staggered hopping amplitudes.

Aug 29, 2019 · The Su-Schrieffer-Heeger (SSH) model on a two-dimensional square lattice exhibits a topological phase transition which is related to the Zak phase determined by bulk band topology. The strong modulation of electron hopping causes nontrivial charge polarization even in the presence of inversion symmetry.

Oct 18, 2024 · The interacting SSH model provides an ideal ground to study the interplay between topologically insulating phases and electron-electron interactions. We study the polarization density as a topological invariant and provide an analytic treatment of its behavior in the low-energy sector of the one-dimensional interacting SSH model.

Sonic hedgehog protein (SHH) is a major signaling molecule of embryonic development in humans and animals, encoded by the SHH gene. [5] This signaling molecule is key in regulating embryonic morphogenesis in all animals. SHH controls organogenesis and the organization of the central nervous system, limbs, digits and many other parts of the body.