Photoinduced frustration modulation in κ -type quantum spin liquid candidates

Tepie, M.; Glerean, F.; Ovčar, Juraj; Priya, S.; Miyagawa, K.; Taniguchi, H.; Kanoda, K.; Lončarić, Ivor; Dressel, M.; Mitrano, M. (2025) Photoinduced frustration modulation in κ -type quantum spin liquid candidates. Physical Review B, 112 (14). ISSN 2469-9950

PDF - Submitted Version - article Available under License Creative Commons Attribution. Download (6MB)

Abstract

Geometric frustration is a key parameter controlling electronic and magnetic properties of quantum spin liquid systems, yet remains challenging to tune. Here, we coherently drive molecular vibrations with midinfrared pulses in two organic quantum spin liquid candidates, the insulating kappa-(BEDT-TTF)2Cu2(CN)3 and the metallic kappa(BEDT-TTF)4Hg2.89Br8, and probe their electronic response through ultrafast reflectivity measurements. We observe a nonlinear coupling between local molecular vibrations and nonlocal phonons, which is expected to directly modulate the geometric frustration of their triangular lattice. Our findings establish a promising route to dynamically control frustration in nonbipartite quantum materials.

Item Type:	Article
Uncontrolled Keywords:	Frustrated magnetism; Quantum spin liquid; Ultrafast phenomena; Organic superconductors; Ultrafast pump-probe spectroscopy
Subjects:	NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore- Mile Ivanda; Milko Jakšić; Mario Stipčević; Marko Kralj KK.01.1.1.01.0001 EK
Depositing User:	Lorena Palameta
Date Deposited:	26 Feb 2026 11:34
URI:	http://fulir.irb.hr/id/eprint/11270
DOI:	10.1103/clxp-z2g5

Actions (login required)

View Item