Topological quantum phase,transitions in superconductivity on lattices

Y. Hatsugai, S. Ryu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Topological quantum phase transitions in superconductivity are discussed on two-dimensional lattices. The main focus is on the Chem number for superconducting states. Each superconductivity is characterized by the Chem number, and the quantum phase transition is associated with topological changes of the quasiparticle Bloch function in the Brillouin zone. For the superconducting case, the Chem number has several equivalent but different topological expressions given by vortices, the Dirac monopole, and strings. We demonstrate quantum phase transitions by these topological quantities both for singlet and triplet cases.

Original languageEnglish (US)
Article number212510
Pages (from-to)2125101-2125104
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
StatePublished - Jun 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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