2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Anomalous transport property in Re3Ge7

3 Jun 2019, 13:30
15m
SCC 9000 (Simon Fraser University)

SCC 9000

Simon Fraser University

Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M2-9 Magnetism and heavy fermions II (DCMMP) | Magnétisme et fermions lourds II DPMCM)

Speaker

Anja Rabus (Simon Fraser University)

Description

The rhenium (Re)-based compounds are difficult to synthesize owing to the element’s high melting temperature and low solubility into solid solution. In this talk, we will present an anomalous transport property observed in single crystal Re3Ge7. In zero field, the temperature dependence of electrical resistivity sharply increases below a phase transition temperature Tc = 58.5 K, showing a metal-to-insulator-like transition. Analysis of the Hall coefficient measurements indicates that the carrier density is 0.04 per formula unit at 300 K and drops by two orders of magnitude below Tc. When magnetic field is applied, the temperature dependence of resistivity develops a maximum around 30 K, deviating from an ordinary metallic behaviour. At low temperatures, the Shubnikov-de Hass quantum oscillations are detected on top of the linear field dependence of magnetoresistance.

Primary author

Anja Rabus (Simon Fraser University)

Co-author

Eundeok Mun

Presentation Materials

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