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M. Kriegisch, J. Custers, C. Geibel, G. Hilscher, C. Krellner, M. Müller, F. Steglich, S. Paschen:
"Hall effect of YbIr₂Si₂";
Physica B: Condensed Matter, 403 (2008), S. 1295 - 1297.

The well known intermetallic compound YbRh₂Si₂ (tetragonal ThCr₂Si₂ structure) is a heavy fermion system which orders antiferromagnetically at View the MathML source. Application of a magnetic field suppresses the Néel temperature continuously to zero and thus accesses a magnetic-field induced quantum critical point (QCP). The Hall coefficient shows a broadened step-like decrease as a function of applied field which extrapolates, at T=0, to a sharp step at the QCP, indicating that this QCP is not of spin density wave type. The iso-structural compound YbIr₂Si₂ (I-type) does not order magnetically down to the lowest temperatures but does, nevertheless, show non-Fermi liquid behaviour in wide regions of the temperature-field phase diagram. Here we use field-dependent Hall-effect measurements as a probe of a putative nearby QCP in YbIr₂Si₂.

YbIr₂Si₂; Quantum critical point; Hall effect; Heavy fermion

http://dx.doi.org/10.1016/j.physb.2007.10.357

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