(d_{{\mbox{\boldmath$k$}},0,s}^{\dag},d_{{\mbox{\boldmath$k$}},0,s}^{\dag},d_{{\mbox{\boldmath$k$}},0,s}^{\dag})= (c_{{\mbox{\boldmath$k$}},0,s}^{\dag},c_{{\mbox{\boldmath$k$}},0,s}^{\dag},c_{{\mbox{\boldmath$k$}},0,s}^{\dag})