Download PDF by Andreas W Rost: Magnetothermal Properties near Quantum Criticality in the

By Andreas W Rost

ISBN-10: 364214523X

ISBN-13: 9783642145230

The compound Sr3Ru2O7 of the strontium ruthenate kinfolk has been intensely studied simply because experimental proof means that quantum fluctuations dominate the magnetic part diagram within the neighborhood of a singular low-temperature part. in an effort to comprehend the interaction among the quantum severe fluctuations and the part formation, finished thermodynamic details is vital. This thesis experiences the result of either specific-heat and magnetocaloric experiments conducted with a bespoke experimental equipment whose layout rather addresses the difficult constraints of the low-temperature, high-magnetic-field surroundings. The experimental info provide facts for strange thermodynamic homes of the radical section and its bounding section transitions. in addition they express that the section formation happens opposed to a heritage of strongly peaking entropy, suggesting that quantum criticality performs a key function within the physics of the program.

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Additional resources for Magnetothermal Properties near Quantum Criticality in the Itinerant Metamagnet Sr3Ru2O7 (Springer Theses)

Example text

These are lifted, leading to a reconstruction of the Fermi surface. c The band structure in the kx–ky plane as extracted from an ARPES measurement [61]. For details regarding the labelling please see text. d The density of states as function of energy relative to the Fermi energy as measured by ARPES for the two c pockets and their total sum. The error bar in energy represents the experimental uncertainty in the position of the Fermi energy. The plot is reproduced from [61] (labelling changed for consistency) The effect of these assumptions on the Fermi surface are sketched in Fig.

Though different in detail, the overall geometrical similarities between the measurement and the prediction based on a very simple model is remarkable. One can therefore assume as an hypothesis that the above assumptions are a good starting point for an understanding of the band structure of Sr3Ru2O7 in zero field. The Fermi surfaces in Fig. 19c are therefore labelled in accordance to their relation to the Fermi surface and band structure in Sr2RuO4. For example the a1 and a2 sheets are mainly derived from the a Fermi surface sheet in Sr2RuO4.

61]. Though different in detail, the overall geometrical similarities between the measurement and the prediction based on a very simple model is remarkable. One can therefore assume as an hypothesis that the above assumptions are a good starting point for an understanding of the band structure of Sr3Ru2O7 in zero field. The Fermi surfaces in Fig. 19c are therefore labelled in accordance to their relation to the Fermi surface and band structure in Sr2RuO4. For example the a1 and a2 sheets are mainly derived from the a Fermi surface sheet in Sr2RuO4.

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Magnetothermal Properties near Quantum Criticality in the Itinerant Metamagnet Sr3Ru2O7 (Springer Theses) by Andreas W Rost


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