TY - JOUR
T1 - Deconfined quantum critical point lost in pressurized SrCu2(BO3)2
AU - Guo, Jing
AU - Wang, Pengyu
AU - Huang, Cheng
AU - Chen, Bin Bin
AU - Hong, Wenshan
AU - Cai, Shu
AU - Zhao, Jinyu
AU - Han, Jinyu
AU - Chen, Xintian
AU - Zhou, Yazhou
AU - Li, Shiliang
AU - Wu, Qi
AU - Meng, Zi Yang
AU - Sun, Liling
N1 - Publisher Copyright:
© The Author(s) 2025.
PY - 2025/12
Y1 - 2025/12
N2 - The deconfinement quantum critical point (DQCP), a paradigm beyond the Landau-Ginzburg-Wilson framework to classify states of matters, has been attracting extensive attention over the past two decades. Experimentally, SrCu2(BO3)2 plays key roles in verifying the DQCP between an antiferromagnetic (AF) Néel phase and a plaquette-singlet (PS) phase. However, the verification of the DQCP of the PS-AF transition lies in 2.4 - 3.1 GPa, which is unreachable previously due to technical limitations. Here, through the advanced high-pressure heat capacity measurements, we demonstrate that the PS-AF phase transition of SrCu2(BO3)2 at zero field is clearly first-order. Our result clarifies the two-decade-long debates about this key issue and resonates nicely with recent theoretical consensus that the previously predicted DQCPs in representative models are actually first-order transitions. Besides, the PS and AF phases transit at the same pressure-temperature point, a bi-critical point found in frustrated magnets.
AB - The deconfinement quantum critical point (DQCP), a paradigm beyond the Landau-Ginzburg-Wilson framework to classify states of matters, has been attracting extensive attention over the past two decades. Experimentally, SrCu2(BO3)2 plays key roles in verifying the DQCP between an antiferromagnetic (AF) Néel phase and a plaquette-singlet (PS) phase. However, the verification of the DQCP of the PS-AF transition lies in 2.4 - 3.1 GPa, which is unreachable previously due to technical limitations. Here, through the advanced high-pressure heat capacity measurements, we demonstrate that the PS-AF phase transition of SrCu2(BO3)2 at zero field is clearly first-order. Our result clarifies the two-decade-long debates about this key issue and resonates nicely with recent theoretical consensus that the previously predicted DQCPs in representative models are actually first-order transitions. Besides, the PS and AF phases transit at the same pressure-temperature point, a bi-critical point found in frustrated magnets.
UR - https://www.scopus.com/pages/publications/85218407427
U2 - 10.1038/s42005-025-01976-8
DO - 10.1038/s42005-025-01976-8
M3 - 文章
AN - SCOPUS:85218407427
SN - 2399-3650
VL - 8
JO - Communications Physics
JF - Communications Physics
IS - 1
M1 - 75
ER -