Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.72: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Pressure-dependent resistivity measurements on the novel charge-transfer salt (BEDT-TTF)2Cu2Br3 — •Sebastian Köhler1, Ulrich Tutsch1, Friedhelm Isselbächer1, Michael Lang1, Frauke Schödel2, Hans-Wolfram Lerner2, and Matthias Wagner2 — 1Physikalisches Institut, Goethe-Universität Frankfurt (M), SFB/TRR49, D-60438 Frankfurt (M) — 2Institut für Anorganische Chemie, Goethe-Universität Frankfurt (M), D-60438 Frankfurt (M)
During the course of optimizing parameters for the synthesis of the known charge-transfer salt (BEDT-TTF)2Cu[N(CN)2]Br, a novel salt, (BEDT-TTF)2Cu2Br3 has been obtained [1]. It is known that other compounds from this family of materials exhibit a variety of electronic properties such as (Mott-)insulating, semiconducting, metallic or even superconducting behaviour, accessible by either chemical or hydrostatic pressure. Resistivity measurements have been performed at ambient pressure on single crystals of (BEDT-TTF)2Cu2Br3 in a temperature range from 300 K down to 10 K, yielding a semiconductor-like behaviour with a small gap of about 30 meV. Our aim is to study the possibility of closing the semiconducting gap by applying hydrostatic pressure and thereby to induce metallic or even superconducting behaviour. We present measurements of the resistance under hydrostatic pressure on (BEDT-TTF)2Cu2Br3 in a temperature range from 300 K to 4 K at various pressure values.
Eur. J. Inorg. Chem. 2011, 1205-1211