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Publications in Scientific Journals:

E. Bauer, H. Michor, T. Muramatsu, T. Kanemasa, T. Kagayama, K. Shimizu, Y. Aoki, H. Sato, M. Giovannini:
"Occurrence of two quantum critical points in Yb2Pd2Sn or, Yb systems do not behave mirror-like to Ce compounds";
Journal of Optoelectronics and Advanced Materials, 10 (2008), 7; 1633 - 1638.



English abstract:
We report on the discovery of two pressure driven quantum critical points appearing in ternary Yb2Pd2Sn, where the application of pressure of about 1 GPa establishes long-range antiferromagnetic order, but above an upper bound of about 4 GPa, magnetic order vanishes again, giving rise to two phase transitions at zero temperature. Associated with the QCPs in Yb2Pd2Sn, we observe nFl behaviour from precise resistivity measurements. We argue that this emergent behaviour corresponds to two pressure dependent, mutually competing energy scales exerted to the Yb ions. Electronic properties associated with the paramagnetic state below and above the critical pressures disagree, as evident from a negative and a positive Grüneisen parameter, respectively. Our novel finding, without much doubt, is a unique property of Yb systems.

Keywords:
Pressure drven critical points, Yb-Pd-Sn, Quantum phase transition


Electronic version of the publication:
http://inoe.inoe.ro/joam/index.php?option=magazine&op=view&idu=1460&catid=28


Created from the Publication Database of the Vienna University of Technology.