Enhancement of chiral edge currents in (d+1)-dimensional atomic Mott-band hybrid insulators

Year: 2023

Authors: Ferraretto M., Richaud A., Del Re L., Fallani L., Capone M.

Autors Affiliation: Scuola Int Super Avanzati SISSA, Via Bonomea 265, I-34136 Trieste, Italy; Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany; Georgetown Univ, Dept Phys, 37th & O Sts NW, Washington, DC 20057 USA; Univ Florence, Dept Phys & Astron, I-50019 Sesto Fiorentino, Italy; European Lab Nonlinear Spect, LENS, I-50019 Sesto Fiorentino, Italy; Ist Nazl Ott CNR, CNR, Sez Sesto Fiorentino, INO, I-50019 Sesto Fiorentino, Italy; IOM Democritos, CNR, Via Bonomea 265, I-34136 Trieste, Italy.

Abstract: We consider the effect of a local interatomic repulsion on synthetic heterostructures where a discrete synthetic dimension is created by Raman processes on top of SU(N)symmetric two-dimensional lattice systems. At a filling of one fermion per site, increasing the interaction strength, the system is driven towards a Mott state which is adiabatically connected to a band insulator. The chiral currents associated with the synthetic magnetic field increase all the way to the Mott transition, where they reach the maximum value, and they remain finite in the whole insulating state. The transition towards the Mott-band insulator is associated with the opening of a gap within the low-energy quasiparticle peak, while a mean-field picture is recovered deep in the insulating state.

Journal/Review: SCIPOST PHYSICS

Volume: 14 (3)      Pages from: 48-1  to: 48-25

More Information: The authors would like to thank A. Recati, L.F. Tocchio, and L. Livi for fruitful discussions. We acknowledge financial support from MIUR through the PRIN 2017 (Prot. 20172H2SC4 005) and PRIN 2020 (Prot. 2020JLZ52N 002) programs and Horizon 2020 through the ERC project FIRSTORM (Grant Agreement 692670) and ERC project TOPSIM (Grant Agreement 682629) . L.D.R. acknowledges financial support from the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering under Grant No. DE-SC0019469. We acknowledge financial support from PNRR MUR project PE0000023-NQSTI.
KeyWords: Attribution 4; 0 International License
DOI: 10.21468/SciPostPhys.14.3.048

ImpactFactor: 4.600
Citations: 5
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