Spin-charge ordering induced by magnetic field in superconducting state: Analytical self-consistent solution in the two-dimensional model
1 L. D. Landau Institute for Theoretical Physics - 142432 Chernogolovka, Russia
2 Theoretical Physics and Quantum Technologies Department, Moscow Institute for Steel and Alloys 119049 Moscow, Russia
Received: 12 December 2014
Accepted: 24 February 2015
A first-order phase transition is predicted between a spatially homogeneous superconducting state and a state with a space-modulated composite spin-charge-superconducting order parameter in an applied external magnetic field. In this state the superconducting order changes sign when entering the “stripe-phase” ordered domain. Corresponding self-consistent solutions of the Bogoliubov-de Gennes equations are found in an analytic form for the two-dimensional Hubbard model with symmetry of the superconducting order parameter in an external magnetic field.
PACS: 74.20.-z – Theories and models of superconducting state / 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 74.25.Ha – Magnetic properties including vortex structures and related phenomena
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