Hall-effect across a heavy-fermions quantum critical point

Article Abstract:

A quantum critical point (QCP) develops in a material at absolute zero when a new form of order emerges in its ground state, heavy-fermions plays a key role in the study of antifferromagnetic QCPs. The measurements of the low-temperature Hall coefficient (R (sub H)) - a measure of the Fermi surface volume is reported in the heavy fermion metal YbRh (sub 2) Si (sub 2) upon field-tuning it from an antiferromagnetic to a paramagnetic state.

Quantum Hall effect, Biomedical materials, Biomaterials, Chemical compounds

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The break-up of heavy electrons at a quantum critical point

Article Abstract:

The authors have investigated the point of absolute zero, called quantum critical point. Results demosnatre that when germanium-doped YbRh (sub)2 Si (sub)2 is turned away from the chemically induced quantum critical point by magnetic fields, there is temperature dependence of specific heat and resistivity.

United States, Germany, France, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Germanium, Magnetic fields, Electrons, Quantum chemistry

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Strong coupling between local moments and superconducting 'heavy' electrons in UPd2Al3

Article Abstract:

Research is presented concerning the two-component electronic character of the U-based heavy-fermion superconductor UPd2Al3. The heavy-mass itinerant and pronounced local-moment behavior of the superconductor is discussed.

Electric properties, Letter to the Editor, Mesons, Superconductors

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