Bogoliubov quasiparticle

In condensed matter physics, a Bogoliubov quasiparticle or Bogoliubon is a quasiparticle that occurs in superconductors.^[1] Whereas superconductivity is characterized by the condensation of Cooper pairs into the same ground quantum state, Bogoliubov quasiparticles are elementary excitations above the ground state, which are superpositions (linear combinations) of the excitations of negatively charged electrons and positively charged electron holes, and are therefore neutral spin-½ fermions.^[2] These quasiparticles are named after Nikolay Bogolyubov.

Sometimes these quasiparticles are also called Majorana modes, in analogy with the equations for Majorana fermions.^[3]

References

1. Ronen, Yuval; Cohen, Yonatan; Kang, Jung-Hyun; Haim, Arbel; Rieder, Maria-Theresa; Heiblum, Moty; Mahalu, Diana; Shtrikman, Hadas (1 January 2016). "Charge of a quasiparticle in a superconductor". Proceedings of the National Academy of Sciences. 113 (7): 1743–1748. arXiv:1505.03147. Bibcode:2016PNAS..113.1743R. doi:10.1073/pnas.1515173113. ISSN 0027-8424. PMC 4763780. PMID 26831071.
2. Kivelson, S. A.; Rokhsar, D. S. (1 May 1990). "Bogoliubov quasiparticles, spinons, and spin-charge decoupling in superconductors". Physical Review B. American Physical Society (APS). 41 (16): 11693–11696. Bibcode:1990PhRvB..4111693K. doi:10.1103/physrevb.41.11693. ISSN 0163-1829. PMID 9993614.
3. Beenakker, C. W. J. (2014-02-20). "Annihilation of Colliding Bogoliubov Quasiparticles Reveals their Majorana Nature". Physical Review Letters. 112 (7): 070604. arXiv:1312.2001. Bibcode:2014PhRvL.112g0604B. doi:10.1103/PhysRevLett.112.070604. hdl:1887/51769. ISSN 0031-9007. PMID 24579584. S2CID 28799019.