<i>Colloquium</i>: Heavy-electron quantum criticality and single-particle spectroscopy
Stefan Kirchner, S. Paschen, Qiuyun Chen, S. Wirth, Donglai Feng, J. D. Thompson, Qimiao Si
Abstract
Quantum critical behavior occurs at low temperatures where quantum fluctuations become more important than thermal fluctuations. Of particular current interest is unconventional quantum criticality, which lacks a classical thermal counterpart. Angle resolved photoemission and scanning tunneling microscopy are experimental techniques that measure single-particle excitations, and recently been used to probe strongly correlated metals near quantum critical points Here, how the single-particle properties reflect the unconventional quantum criticality is discussed, and the prospect for further measurements to unearth new physical behavior.
Topics & Concepts
PhysicsCriticalitySpectroscopyParticle (ecology)Nuclear physicsElectronAtomic physicsQuantum mechanicsGeologyOceanographyRare-earth and actinide compoundsIron-based superconductors researchPhysics of Superconductivity and Magnetism