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TT: Fachverband Tiefe Temperaturen

TT 49: Frustrated Magnets: Strong Spin-Orbit Coupling I

TT 49.4: Vortrag

Mittwoch, 20. März 2024, 15:45–16:00, H 2053

Spin-Peierls Kitaev-Heisenberg models: auxiliary field quan- tum Monte Carlo studies — Toshihro Sato¹, •João Carvalho- Inacio², Jeroen van den Brink¹, and Fakher F. Assaad² — ¹IFW Dresden — ²University of Würzburg

Recently we have formulated auxiliary field quantum Monte Carlo sim- ulations Heisenberg-Kitaev model [1]. This approach offers the possi- bility of reaching temperature scales roughly a factor two smaller that the magnetic scale before running into severe negative sign problems. Here we show that we can generalize this approach to include Einstein phonons. Importantly we show that the inclusion of phonons does not render the sign problem more severe such that the approach offers the possibility of investigating signatures of fractionalization on phonon spectral functions.

[1] T. Sato, F. F. Assaad, Phys. Rev. B 104 (2021) L081106.

Keywords: Heisenberg-Kitaev; Spin-Peierls; Auxiliary field quantum Monte Carlo