Three-dimensional Bose-Einstein Condensation in the Spin-1/2 Ferromagnetic-leg Ladder 3-Br-4-F-V

TL;DR

This study investigates the critical behavior of a spin-1/2 ferromagnetic-leg ladder compound, demonstrating that its phase transition aligns with the 3D Bose-Einstein condensation universality class, confirming the universality in quantum magnets.

Contribution

The paper provides experimental evidence that the phase boundary critical exponents in 3-Br-4-F-V match the 3D BEC universality class, establishing it as a new quantum magnet exhibiting this universality.

Findings

Critical exponents agree with 3D BEC universality class

Phase boundary behavior confirmed near critical fields

Supports universality of 3D BEC in quantum magnets

Abstract

The critical exponent of the phase boundary has been examined on the three-dimensional incommensurate ordering phase in the spin-1/2 ferromagnetic-leg ladder 3-Br-4-F-V [=3-(3-bromo-4-fluorophenyl)-1,5-diphenylverdazyl]. Using the temperature-window fitting technique, we obtained the critical exponents which agreed with the three-dimensional (3D) Bose-Einstein condensation (BEC) universality class at both sides of the lower critical field and the saturation field. 3-Br-4-F-V thus becomes a new member of the quantum magnets which prove the universality of the 3D BEC exponent.