scholarly journals Isotope Effects in Underdoped Cuprate Superconductors: A Quantum Critical Phenomenon

2001 ◽  
Vol 86 (21) ◽  
pp. 4899-4902 ◽  
Author(s):  
T. Schneider ◽  
H. Keller
Keyword(s):  
Cuprate Superconductors ◽  
Critical Phenomenon ◽  
Isotope Effects ◽  
Quantum Critical

scholarly journals Singular charge fluctuations at a magnetic quantum critical point

Science ◽  
2020 ◽  
Vol 367 (6475) ◽  
pp. 285-288 ◽  
Author(s):  
L. Prochaska ◽  
X. Li ◽  
D. C. MacFarland ◽  
A. M. Andrews ◽  
M. Bonta ◽  
...  
Keyword(s):  
Optical Conductivity ◽  
Heavy Fermion ◽  
Molecular Beam ◽  
Cuprate Superconductors ◽  
Quantum Critical Point ◽  
Charge Fluctuations ◽  
Quantum Matter ◽  
Temperature Scaling ◽  
Landau Quantum ◽  
Quantum Critical

Strange metal behavior is ubiquitous in correlated materials, ranging from cuprate superconductors to bilayer graphene, and may arise from physics beyond the quantum fluctuations of a Landau order parameter. In quantum-critical heavy-fermion antiferromagnets, such physics may be realized as critical Kondo entanglement of spin and charge and probed with optical conductivity. We present terahertz time-domain transmission spectroscopy on molecular beam epitaxy–grown thin films of YbRh2Si2, a model strange-metal compound. We observed frequency over temperature scaling of the optical conductivity as a hallmark of beyond-Landau quantum criticality. Our discovery suggests that critical charge fluctuations play a central role in the strange metal behavior, elucidating one of the long-standing mysteries of correlated quantum matter.

scholarly journals Real and Marginal Isotope Effects in Cuprate Superconductors

2007 ◽  
Vol 20 (5) ◽  
pp. 393-396 ◽  
Author(s):  
A. R. Bishop ◽  
A. Bussmann-Holder ◽  
O. V. Dolgov ◽  
A. Furrer ◽  
H. Kamimura ◽  
...  
Keyword(s):  
Cuprate Superconductors ◽  
Isotope Effects
Sign in / Sign up

Export Citation Format

Share Document