scholarly journals Magnonic quantum spin Hall state in the zigzag and stripe phases of the antiferromagnetic honeycomb lattice

2018 ◽  
Vol 97 (18) ◽  
Author(s):  
Ki Hoon Lee ◽  
Suk Bum Chung ◽  
Kisoo Park ◽  
Je-Geun Park
Keyword(s):  
Quantum Spin ◽  
Honeycomb Lattice ◽  
Stripe Phases ◽  
Quantum Spin Hall

scholarly journals Strain-Induced Quantum Spin Hall Effect in Two-Dimensional Methyl-Functionalized Silicene SiCH3

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 698 ◽  
Author(s):  
Ceng-Ceng Ren ◽  
Wei-Xiao Ji ◽  
Shu-Feng Zhang ◽  
Chang-Wen Zhang ◽  
Ping Li ◽  
...  
Keyword(s):  
Hexagonal Boron Nitride ◽  
Quantum Spin ◽  
Honeycomb Lattice ◽  
Potential Candidate ◽  
Two Dimensional ◽  
Edge States ◽  
Spin Orbital ◽  
Spintronic Devices ◽  
Potential Applications ◽  
Quantum Spin Hall

Quantum Spin Hall (QSH) has potential applications in low energy consuming spintronic devices and has become a researching hotspot recently. It benefits from insulators feature edge states, topologically protected from backscattering by time-reversal symmetry. The properties of methyl functionalized silicene (SiCH3) have been investigated using first-principles calculations, which show QSH effect under reasonable strain. The origin of the topological characteristic of SiCH3, is mainly associated with the s-pxy orbitals band inversion at Γ point, whilst the band gap appears under the effect of spin-orbital coupling (SOC). The QSH phase of SiCH3 is confirmed by the topological invariant Z2 = 1, as well as helical edge states. The SiCH3 supported by hexagonal boron nitride (BN) film makes it possible to observe its non-trivial topological phase experimentally, due to the weak interlayer interaction. The results of this work provide a new potential candidate for two-dimensional honeycomb lattice spintronic devices in spintronics.

A New Type of Large‐Gap Quantum Spin Hall Insulator Material ZrSe 5

2021 ◽  
Author(s):  
Xing Wang ◽  
Wenhui Wan ◽  
Yanfeng Ge ◽  
Jun Li ◽  
Yong Liu
Keyword(s):  
Quantum Spin ◽  
New Type ◽  
Quantum Spin Hall

scholarly journals Quantum loop states in spin-orbital models on the honeycomb lattice

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Lucile Savary
Keyword(s):  
Realistic Model ◽  
Quantum Spin ◽  
Honeycomb Lattice ◽  
Spin Liquids ◽  
Spin Orbital ◽  
Experimental Realization ◽  
Quantum Phases ◽  
Quantum Spin Liquids ◽  
Quantum Spin Liquid ◽  
Symmetry Protected

AbstractThe search for truly quantum phases of matter is a center piece of modern research in condensed matter physics. Quantum spin liquids, which host large amounts of entanglement—an entirely quantum feature where one part of a system cannot be measured without modifying the rest—are exemplars of such phases. Here, we devise a realistic model which relies upon the well-known Haldane chain phase, i.e. the phase of spin-1 chains which host fractional excitations at their ends, akin to the hallmark excitations of quantum spin liquids. We tune our model to exactly soluble points, and find that the ground state realizes Haldane chains whose physical supports fluctuate, realizing both quantum spin liquid like and symmetry-protected topological phases. Crucially, this model is expected to describe actual materials, and we provide a detailed set of material-specific constraints which may be readily used for an experimental realization.

scholarly journals Doping-Induced Quantum Spin Hall Insulator to Superconductor Transition

2021 ◽  
Vol 126 (20) ◽  
Author(s):  
Zhenjiu Wang ◽  
Yuhai Liu ◽  
Toshihiro Sato ◽  
Martin Hohenadler ◽  
Chong Wang ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Quantum Spin Hall

scholarly journals Van Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
G. Sala ◽  
M. B. Stone ◽  
Binod K. Rai ◽  
A. F. May ◽  
Pontus Laurell ◽  
...  
Keyword(s):  
Disordered Systems ◽  
Inelastic Neutron Scattering ◽  
Magnetic Moments ◽  
Wave Theory ◽  
Inelastic Neutron ◽  
Quantum Spin ◽  
Honeycomb Lattice ◽  
Quantum Magnetism ◽  
Van Hove Singularity ◽  
Sharp Feature

AbstractIn quantum magnets, magnetic moments fluctuate heavily and are strongly entangled with each other, a fundamental distinction from classical magnetism. Here, with inelastic neutron scattering measurements, we probe the spin correlations of the honeycomb lattice quantum magnet YbCl3. A linear spin wave theory with a single Heisenberg interaction on the honeycomb lattice, including both transverse and longitudinal channels of the neutron response, reproduces all of the key features in the spectrum. In particular, we identify a Van Hove singularity, a clearly observable sharp feature within a continuum response. The demonstration of such a Van Hove singularity in a two-magnon continuum is important as a confirmation of broadly held notions of continua in quantum magnetism and additionally because analogous features in two-spinon continua could be used to distinguish quantum spin liquids from merely disordered systems. These results establish YbCl3 as a benchmark material for quantum magnetism on the honeycomb lattice.

scholarly journals Signature of Large-Gap Quantum Spin Hall State in the Layered Mineral Jacutingaite

Nano Letters ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 5207-5213 ◽  
Author(s):  
Konrád Kandrai ◽  
Péter Vancsó ◽  
Gergő Kukucska ◽  
János Koltai ◽  
György Baranka ◽  
...  
Keyword(s):  
Quantum Spin ◽  
Quantum Spin Hall
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