Orbital phases of $p$-band ultracold fermions in the frustrated triangular lattice
- URL: http://arxiv.org/abs/2407.00932v1
- Date: Mon, 1 Jul 2024 03:33:08 GMT
- Title: Orbital phases of $p$-band ultracold fermions in the frustrated triangular lattice
- Authors: Jiaqi Wu, Hui Tan, Rui Cao, Jianmin Yuan, Yongqiang Li,
- Abstract summary: In this work, we consider spinless fermionic atoms loaded into $p$-orbital bands of a two-dimensional frustrated triangular lattice.
The system can be described by an extended Fermi-Hubbard model, which is numerically solved by using the orbital version of real-space dynamical mean-field theory.
- Score: 11.409438496177826
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Orbital degrees of freedom play an important role for understanding the emergence of unconventional quantum phases. Ultracold atomic gases in optical lattices provide a wonderful platform to simulate orbital physics. In this work, we consider spinless fermionic atoms loaded into $p$-orbital bands of a two-dimensional frustrated triangular lattice. The system can be described by an extended Fermi-Hubbard model, which is numerically solved by using the orbital version of real-space dynamical mean-field theory. Low-temperature phase diagrams are obtained, which contain stripe-, ferro- and para-orbital ordered quantum phases, due to the interplay of anisotropic hoppings and geometrical frustration. In order to understand the underlying mechanics of competing orbital orders, we derive an effective orbital-exchange model, which yields consistent explanation with our main numerical results.
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