Low Temperature Physics: 37, 749 (2011); https://doi.org/10.1063/1.3670033 (6 pages)
Физика Низких Температур: Том 37, Выпуск 9-10 (Сентябрь 2011), c. 943-949    ( к оглавлению , назад )

Magnetoresistance oscillations up to 32 K in the organic metal β″-(ET)4(H3O)[Fe(C2O4)3]·C6H4Cl2

Vladimir N. Laukhin1,2, Alain Audouard3, David Vignolles3, Enric Canadell2, Tatyana G. Prokhorova4, and Eduard B. Yagubskii4

1Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain

2Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigationes Cientнficas, Campus Universitat Autтnoma de Barcelona, Bellaterra 08193, Spain

3Laboratoire National des Champs Magnétiques Intenses (UPR 3228 CNRS, INSA, UJF, UPS) 143 avenue de Rangueil, F-31400 Toulouse, France

4Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Chernogolovka, MD, Russia
E-mail: vladimir@icmab.es

Received February 2, 2011


Magnetic torque and magnetoresistance of the quasi-two-dimensional charge transfer salt β″-(ET)4(H3O)[Fe(C2O4)3]·C6H4Cl2 have been investigated in pulsed magnetic fields of up to 55 T. At variance with de Haas–van Alphen oscillations, Shubnikov–de Haas oscillations are observed up to temperatures as high as 32 K at ambient pressure despite a significant thermal damping in the low-temperature range. This feature, observed under applied pressure as well, is interpreted on the basis of the coexistence of a closed orbit and a quantum interference path with the same cross section.

PACS: 71.18.+y Fermi surface: calculations and measurements; effective mass, g factor;
PACS: 71.20.Rv Polymers and organic compounds;
PACS: 72.15.Gd Galvanomagnetic and other magnetotransport effects.

Ключевые слова: quantum oscillations, Fermi surface, organic metals, high magnetic fields.