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Role of spinon and spinon singlet pair excitations on phase transitions in $d-wave$ superconductors

Ki-Seok Kim·Jae-Hyeon Eom·Young-Il Seo·Sung-Ho Suck Salk
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Abstract

We examine the roles of massless Dirac spinon and spin singlet pair excitations on the phase transition in $d-wave$ superconductors. Although the massless spinon excitations in the presence of the spin singlet pair excitations do not alter the nature of the phase transition at $T = 0$, that is, the XY universality class, they are seen to induce an additional attractive interaction potential between vortices, further stabilizing vortex-antivortex pairs at low temperature for lightly doped high $T_c$ samples.

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Ki-Seok Kim, Jae-Hyeon Eom, Young-Il Seo, Sung-Ho Suck Salk. 2003-05-16. Role of spinon and spinon singlet pair excitations on phase transitions in $d-wave$ superconductors. https://doi.org/10.1103/physrevb.69.014504

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