SciPost Commentary Page
|Title:||Topological order in the Kitaev/Majorana chain in the presence of disorder and interactions|
|Author(s):||Niklas M. Gergs, Lars Fritz, Dirk Schuricht|
|As Contributors:||Dirk Schuricht|
|Journal ref.:||Physical Review B 93, 075129|
We study the combined effect of interactions and disorder on topological order in one dimension. Toward that end, we consider a generalized Kitaev chain including fermion-fermion interactions and disorder in the chemical potential. We determine the phase diagram by performing density-matrix renormalization-group calculations on the corresponding spin-1/2 chain. We find that moderate disorder or repulsive interactions individually stabilize the topological order, which remains valid for their combined effect. However, both repulsive and attractive interactions lead to a suppression of the topological phase at strong disorder.