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Paramagnetic tunneling systems and their contribution to the polarization echo in glasses (extended)

Autor: Borisenko, A., Jug, G.

Startling magnetic effects on the spontaneous polarization echo in some silicate glasses at low and ultra-low temperatures have been reported in the last decade or so. Though some progress in search of an explanation has been made by considering the

Externí odkaz: http://arxiv.org/abs/1104.1133

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Observation of a Griffiths phase in paramagnetic La1-xSrxMnO3

Autor: Deisenhofer, J., Braak, D., von Nidda, H. -A. Krug, Hemberger, J., Eremina, R. M., Ivanshin, V. A., Balbashov, A. M., Jug, G., Loidl, A., Kimura, T., Tokura, Y.

Publikováno v: Phys. Rev. Lett. 95, 257202 (2005)

We report on the discovery of a novel triangular phase regime in the system La1-xSrxMnO3 by means of electron spin resonance and magnetic susceptibility measurements. This phase is characterized by the coexistence of ferromagnetic entities within the

Externí odkaz: http://arxiv.org/abs/cond-mat/0501443

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Anomalous Frequency-Dependent Conductivity near the Quantum Hall Transition

Autor: Jug, G., Ziegler, K.

The dynamical transport properties near the integer quantum Hall transition are investigated at zero temperature by means of the Dirac fermion approach. These properties have been studied experimentally at low frequency omega and low temperature near

Externí odkaz: http://arxiv.org/abs/cond-mat/9811218

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Characterization of the Local Density of States Fluctuations near the Integer Quantum Hall Transition in a Quantum Dot Array

Autor: Jug, G., Ziegler, K.

We present a calculation for the second moment of the local density of states in a model of a two-dimensional quantum dot array near the quantum Hall transition. The quantum dot array model is a realistic adaptation of the lattice model for the quant

Externí odkaz: http://arxiv.org/abs/cond-mat/9706256

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Is the Peak Value of $\sigma_{xx}$ at the Quantum Hall Transition Universal?

Autor: Ziegler, K., Jug, G.

The question of the universality of the longitudinal peak conductivity at the integer quantum Hall transition is considered. For this purpose, a system of 2D Dirac fermions with random mass characterised by variance $g$ is proposed as a model which u

Externí odkaz: http://arxiv.org/abs/cond-mat/9704183

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