TY - JOUR
T1 - Characterization of the Fermi surface of (BEDO-TTF)5[CsHg(SCN)4]2 by magnetoresistance measurements and tight-binding band structure calculations
AU - Lyubovskii, Rustem B.
AU - Pesotskii, Serguei I.
AU - Gener, Marc
AU - Rousseau, Roger
AU - Canadell, Enric
AU - Perenboom, Jos A.A.J.
AU - Nizhankovskii, Victor I.
AU - Zhilyaeva, Elena I.
AU - Bogdanova, Olga A.
AU - Lyubovskaya, Rimma N.
PY - 2002
Y1 - 2002
N2 - Tight-binding band structure calculations as well as magnetoresistance and magnetization measurements were carried out in order to characterize the Fermi surface of the novel organic metal (BEDO-TTF)5[CsHg(SCN)4]2. The tight-binding calculations suggest that the Fermi surface can be described as containing two contributions: a closed two-dimensional portion associated with holes and an open pseudo-one-dimensional portion associated with electrons. Shubnikov-de Haas and de Haas-van Alphen oscillations were observed in magnetic fields of up to 14 T and temperatures of 1.5-4.2 K. Four frequencies (F1 = 650 T, F2 = 2600 T, F3 = 3200 T and F4 = 3850 T) associated with the Shubnikov-de Haas oscillationswere found. The F1 and F4 frequencies are in good agreement with the calculated Fermi surface provided that the possibility of a magnetic breakdown effect is taken into account. It is also suggested that the F2 and F3 frequencies can be understood in the frame of the quantum interference effect.
AB - Tight-binding band structure calculations as well as magnetoresistance and magnetization measurements were carried out in order to characterize the Fermi surface of the novel organic metal (BEDO-TTF)5[CsHg(SCN)4]2. The tight-binding calculations suggest that the Fermi surface can be described as containing two contributions: a closed two-dimensional portion associated with holes and an open pseudo-one-dimensional portion associated with electrons. Shubnikov-de Haas and de Haas-van Alphen oscillations were observed in magnetic fields of up to 14 T and temperatures of 1.5-4.2 K. Four frequencies (F1 = 650 T, F2 = 2600 T, F3 = 3200 T and F4 = 3850 T) associated with the Shubnikov-de Haas oscillationswere found. The F1 and F4 frequencies are in good agreement with the calculated Fermi surface provided that the possibility of a magnetic breakdown effect is taken into account. It is also suggested that the F2 and F3 frequencies can be understood in the frame of the quantum interference effect.
KW - (BEDO-TTF)[CsHg(SCN)]
KW - BEDO-TTF
KW - Fermi surface characterization
KW - Magnetoresistance
KW - Organic metal
KW - Tight-binding band structure calculation
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U2 - 10.1039/b107223b
DO - 10.1039/b107223b
M3 - Article
AN - SCOPUS:0036208761
SP - 483
EP - 488
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
ER -