2000/07/04 by J. Spałek, Jozef Spalek · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Fermion #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Spin (aerodynamics) #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.63.104513
16 pages, LaTex, submitted to Phys. Rev. B
arxiv created 2000/07/04 · openalex publication_date 2001/02/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss general implications of the local spin-triplet pairing among fermions induced by local ferromagnetic exchange, an example of which is the Hund's rule coupling. The quasiparticle energy and their wave function are determined for the three principal phases with the gap, which is momentum independent. We utilize the Bogolyubov--Nambu--de Gennes approach, which in the case of triplet pairing in the two-band case leads to the four-components wave function. Both gapless modes and those with an isotropic gap appear in the quasiparticle spectrum. A striking analogy with the Dirac equation is briefly explored. This type of pairing is relevant to relativistic fermions as well, since it reflects the fundamental discrete symmetry-particle interchange. A comparison with the local interband spin-singlet pairing is also made.