Source: wikibot/quantum-spin-hall-effect
= Quantum spin Hall effect
{wiki=Quantum_spin_Hall_effect}
The Quantum Spin Hall (QSH) effect is a topological phase of matter characterized by the presence of edge states that conduct electricity without dissipation, while the bulk of the material remains insulating. It is a two-dimensional analogue of the three-dimensional Quantum Hall effect, but it occurs without the necessity of an external magnetic field.