NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Field-induced Quantum Fluctuations in the Heavy Fermion Superconductor CeCu2Ge2
Published
Author(s)
Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, Jose A. Rodriguez, Tobias K Herman
Abstract
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.
Heavy fermion, superconductivity, quantum critical phenomenon
Citation
, 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], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=908800
(Accessed October 12, 2025)