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Author (up) Petrova, O.; Mellado, P.; Tchernyshyov, O. pdf  doi
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  Title Unpaired Majorana modes on dislocations and string defects in Kitaev's honeycomb model Type Journal Article
  Year 2014 Publication Physical Review B Abbreviated Journal Phys. Rev. B  
  Volume 90 Issue 13 Pages 14 pp  
  Keywords  
  Abstract We study the gapped phase of Kitaev's honeycomb model (a Z(2) spin liquid) on a lattice with topological defects. We find that some dislocations and string defects carry unpaired Majorana fermions. Physical excitations associated with these defects are (complex) fermion modes made out of two (real) Majorana fermions connected by a Z(2) gauge string. The quantum state of these modes is robust against local noise and can be changed by winding a Z(2) vortex around one of the dislocations. The exact solution respects gauge invariance and reveals a crucial role of the gauge field in the physics of Majorana modes. To facilitate these theoretical developments, we recast the degenerate perturbation theory for spins in the language of Majorana fermions.  
  Address [Petrova, Olga] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2469-9950 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000342794300003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 417  
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