The entire magnetization process of TlCuCl3 has been experimentally investigated up to 100 T employing the single-turn technique. The upper critical field Hc2 is observed to be 86.1 T at 2 K. A convex slope of the M-H curve between the lower and upper critical fields (Hc1 and Hc2) is clearly observed, which indicates that a particle-hole symmetry is broken in TlCuCl3. By quantum Monte Carlo simulation and the bond-operator theory method, we find that the particle-hole symmetry breaking results from strong inter-dimer interactions.
@article{arxiv.2009.11028,
title = {Particle-hole symmetry breaking in a spin-dimer system TlCuCl$_3$ observed at 100 T},
author = {X. -G. Zhou and Yuan Yao and Y. H. Matsuda and A. Ikeda and A. Matsuo and K. Kindo and H. Tanaka},
journal= {arXiv preprint arXiv:2009.11028},
year = {2021}
}