Funct. Mater. 2014; 21 (2): 130-136.

http://dx.doi.org/10.15407/fm21.02.130

Low temperature characteristics of germanium whiskers

A.A.Druzhinin [1,2], I.P.Ostrovskii[1,2], Yu.N.Khoverko[1,2], N.S.Liakh-Kaguy[1], A.M.Vuytsyk[1]

[1] Lviv Polytechnic National University, 1 Kotlyarevski Str., 79013 Lviv, Ukraine
[2] International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland

Abstract: 

Magnetophonone oscillations of magnetoresistance in heavily doped n-Ge whiskers with impurity concentration that corresponds to metal-insulator transition were studied in the temperatures range 4.2-70 K in continuous and pulse magnetic fields up to 14 T and 35 T, respectively. The influence of uniaxial compressive and tentative strain on the magnetophonon oscillations of longitudinal and transverse magnetoresistance of n-Ge whiskers were studied, the intervalley transitions were determined, phonon energy as well as the effective masses of light and heavy electrons in n-Ge whiskers were estimated. Ge whiskers were used for creation of strain-temperature sensors, operating in high magnetic fields and at low temperatures.

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