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- Title
Electromagnetic signatures of a chiral quantum spin liquid.
- Authors
Banerjee, Saikat; Zhu, Wei; Lin, Shi-Zeng
- Abstract
Quantum spin liquids (QSL) have emerged as a captivating subject within interacting spin systems that exhibit no magnetic ordering even at the lowest temperature accessible experimentally. However, definitive experimental evidence remains elusive. In light of the recent surge in theoretical and experimental interest in the half-filled Hubbard model on a triangular lattice, which offers the potential for stabilizing a chiral QSL, we investigate the electromagnetic signatures of this phase to facilitate experimental detection. Utilizing a combination of parton mean-field theory and unbiased density-matrix renormalization group calculations, we systematically examine the electrical charge and orbital electrical current associated with a spinon excitation in the chiral QSL. Additionally, we calculate the longitudinal and transverse optical conductivities below the Mott gap. Furthermore, employing quantum field theory analysis, we unravel the connection between spinon excitations and emergent as well as physical gauge fields. Our results demonstrate that the chiral QSL phase exhibits a distinct electromagnetic response, even within a Mott insulator regime. This finding holds great potential for enabling the experimental detection of this long-sought-after phase.
- Subjects
QUANTUM spin liquid; QUANTUM field theory; GAUGE field theory; RENORMALIZATION group; HUBBARD model; RENORMALIZATION (Physics)
- Publication
NPJ Quantum Materials, 2023, Vol 8, Issue 1, p1
- ISSN
2397-4648
- Publication type
Article
- DOI
10.1038/s41535-023-00595-2