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HL: Fachverband Halbleiterphysik

HL 91: Poster Session: Spintronics / Magnetic Semiconductors / Transport

HL 91.4: Poster

Donnerstag, 29. März 2012, 16:00–19:00, Poster D

Higher order correlation spectroscopy: Theoretical foundation and application — •Sebastian Starosielec, Jörg Rudolph, and Daniel Hägele — AG Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, Germany

Fluctuation spectroscopy and spin noise spectroscopy in specific have opened a growing research field [1,2]. Recently, we implemented higher order correlation spectroscopy up to radio frequencies, significantly extending the usual determination of the (only second order) noise power spectrum [3]. There are recent proposals for identifying physical properties from higher order spectra [4]. As opposed to usual power spectra, the implication of finite frequency resolution (temporal windowing) and finite measurement time to higher order spectra are no longer trivial. Here, we present first steps towards a mathematical framework for practical higher order noise spectroscopy and show a few examples of its application.

[1] M. Oestreich et al., Phys. Rev. Lett. 95, 216603 (2005)

[2] S. Starosielec et al., Appl. Phys. Lett. 93, 051116 (2008)

[3] S. Starosielec et al., Rev. Sci. Instr. 81, 125101 (2010)

[4] R.B. Liu et al., New J. Phys. 12, 013018 (2010)