We report measurements of magnetic quantum oscillations and specific heat at low temperatures across a field-induced antiferromagnetic quantum critical point (QCP)(B_{c0}\approx50T) of the heavy-fermion metal CeRhIn_5. A sharp magnetic-field induced Fermi surface reconstruction is observed inside the antiferromagnetic phase. Our results demonstrate multiple classes of QCPs in the field-pressure phase diagram of this heavy-fermion metal, pointing to a universal description of QCPs. They also suggest that robust superconductivity is promoted by unconventional quantum criticality of a fluctuating Fermi surface.
@article{arxiv.1308.0294,
title = {Multiple quantum phase transitions in a heavy fermion antiferromagnet},
author = {L. Jiao and H. Q. Yuan and Y. Kohama and E. D. Bauer and J. -X. Zhu and J. Singleton and T. Shang and J. L. Zhang and Y. Chen and H. O. Lee and T. Park and M. Jaime and J. D. Thompson and F. Steglich and Q. Si},
journal= {arXiv preprint arXiv:1308.0294},
year = {2015}
}