Details

Autor(en) / Beteiligte

• Anan, Takahiro
• Morimoto, Takahiro
• Kitamura, Sota

Titel

Time-dependent Gutzwiller simulation of Floquet topological superconductivity

Ist Teil von

• Communications physics, 2024-03, Vol.7 (1), p.99-10, Article 99

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2024

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Abstract Periodically driven systems provide a novel route to control the topology of quantum materials. In particular, Floquet theory allows an effective band description of periodically-driven systems through the Floquet Hamiltonian. Here, we study the time evolution of d -wave superconductors irradiated with intense circularly-polarized laser light. We consider the Floquet t – J model with time-periodic interactions, and investigate its mean-field dynamics by formulating the time-dependent Gutzwiller approximation. We observe the development of the i d x y -wave pairing amplitude along with the original $${d}_{{x}^{2}-{y}^{2}}$$ d x 2 − y 2 -wave order upon gradual increasing of the field amplitude. We further numerically construct the Floquet Hamiltonian for the steady state, with which we identify the system as the fully-gapped d + i d superconducting phase with a nonzero Chern number. We explore the low-frequency regime where the perturbative approaches in the previous studies break down, and find that the topological gap of an experimentally-accessible size can be achieved at much lower laser intensities.