Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Poster Session

TT 71.23: Poster

Mittwoch, 18. März 2015, 15:00–18:00, Poster B

High-pressure transport properties of CrB2 — •Alexander Regnat1, Julian Becker1, Jan Spallek1, Andreas Bauer1, Alfonso Chacon1, Robert Ritz1, Christian Blum2, Sabine Wurmehl2, and Christian Pfleiderer11Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2Leibniz Institute for Solid State and Materials Research IFW, D-01171 Dresden, Germany

High quality single crystals of the itinerant antiferromagnet CrB2, TN=88 K, were grown by means of optical float zoning. Bulk, transport and de Haas-van Alphen measurements were carried out [1,2]. Here, we present a comprehensive study of the high-pressure transport properties. Samples were investigated under hydrostatic, uniaxial and quasi-hydrostatic conditions. As a result we are able to attribute contradictory reports for the pressure dependence of TN to uniaxial strain [3, 4]. Perhaps most interestingly, we find a pronounced low temperature resistivity anomaly around 3 GPa in the quasi-hydrostatic case.

[1] Bauer et al., PRB 90, 064414 (2014).

[2] Brasse et al., PRB 88, 155138 (2013).

[3] Boeuf, PhD thesis (2003).

[4] Grechnev et al., J. Low Temp. Phys. 35, 531 (2009).

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