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Field-induced Quantum Fluctuations in the Heavy Fermion Superconductor CeCu2Ge2



Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, Jose A. Rodriguez, Tobias K Herman


Quantum-mechanical fluctuations in strongly correlated electron systems cause unconventional phenomena such as non-Fermi liquid behavior, and arguably high temperature superconductivity. Here we report the discovery of a field-tuned quantum critical phenomenon in stoichiometric CeCu2Ge2, a spin density wave ordered heavy fermion metal that exhibits unconventioanl superconductivty under ~ 10 GPa of applied pressure. Our finding of the associated quantum critical spin fluctuations of the antiferromagnetic spin density wave order, dominating the local fluctuations due to Kondo screening, provide important new information about the underlying mechanism and its interplay with unconventional superconductivity in this novel compound.
Nature Physics


Heavy fermion, superconductivity, quantum critical phenomenon


, D. , Thamizhavel, A. , Lynn, J. , , S. , Rodriguez, J. and , T. (2011), Field-induced Quantum Fluctuations in the Heavy Fermion Superconductor CeCu<sub>2</sub>Ge<sub>2</sub>, Nature Physics, [online], (Accessed May 29, 2024)


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Created October 13, 2011, Updated February 19, 2017