title: Spin Chirality Tuning and Topological Semimetals in Strained HgTe(x)S(1-x).
abstract: By means of detailed electronic structure calculations, we show that strained HgTe(x)S(1-x) alloys show a surprisingly rich topological phase diagram. In the strong topological insulator phase, the spin chirality of the topological nontrivial surface states can be reversed by adjusting the alloy concentration x and the strain. On top of this, we predict two semimetallic topological phases, namely, a Dirac semimetal and a Weyl semimetal. The topological phases are characterized by their Z2 invariants and their mirror Chern numbers.
authors.affiliation: Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle (Saale), Germany.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Rauch
authors.affiliation: Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle (Saale), Germany.
authors.forename: Steven
authors.initials: S
authors.lastname: Achilles
authors.affiliation: Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle (Saale), Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Henk
authors.affiliation: Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle (Saale), Germany.|Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle (Saale), Germany.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Mertig