Dresden 2026 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 2: Quantum-Critical Phenomena (joint session TT/DY)
TT 2.1: Talk
Monday, March 9, 2026, 09:30–09:45, HSZ/0101
Possible Quantum Criticality Tuned by Pressure in CeVGe3 — Rong-Zhu Lin1, Po-Yuan Cheng1, Yusei Shimizu2, Timothée Vasina3, Daniel Braithwaite3, Hanshang Jin4, Peter Klavins4, Valentin Taufour4, and •Chien-Lung Huang1 — 1Department of Physics, National Cheng Kung University and Center for Quantum Frontiers of Research & Technology, Tainan 701, Taiwan — 2International Research Center for Nuclear Materials Science, Institute for Materials Research (IMR-Oarai), Tohoku University, Ibaraki 311-1313, Japan — 3Univ. Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, 38000, Grenoble, France — 4Department of Physics and Astronomy, University of California, Davis, California 95616, USA
In this work, we focus on the helical antiferromagnetic (AFM) CeVGe3 to explore whether an AFM quantum critical point (QCP) can be approached. By performing resistivity measurements under pressure, we construct the pressure-temperature-field phase diagram and track the evolution of multiple field-induced phases. The AFM ordering temperature is suppressed at the critical pressure pc = 0.7 GPa. The coefficient A in the temperature-dependent resistivity ρ = ρ0 + AT2 exhibits a maximum at pc and gradually decreases at higher pressures, indicating enhanced electron-electron correlations near the critical point. These results reveal how the competition between Ruderman-Kittel-Kasuya-Yosida (RKKY) and Kondo interactions evolves under pressure, leading to a plausible pressure-induced QCP in CeVGe3.
Keywords: quantum critical point; 4f system; antiferromagnet; CeVGe$_{3}$