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Quantum criticality in heavy-fermion metals
Quantum criticality describes the collective fluctuations of matter undergoing a second-order phase transition at zero temperature. Heavy-fermion metals have in recent years emerged as prototypical… Expand
Quantum phase transitions in holographic models of magnetism and superconductors
We study a holographic model realizing an "antiferromagnetic" phase in which a global SU(2) symmetry representing spin is broken down to a U(1) by the presence of a finite electric charge density.… Expand
Locally critical quantum phase transitions in strongly correlated metals
When a metal undergoes a continuous quantum phase transition, non-Fermi-liquid behaviour arises near the critical point. All the low-energy degrees of freedom induced by quantum criticality are… Expand
Universally diverging Grüneisen parameter and the magnetocaloric effect close to quantum critical points.
At a generic quantum critical point, the thermal expansion alpha is more singular than the specific heat c(p). Consequently, the "Grüneisen ratio," Gamma=alpha/c(p), diverges. When scaling applies,… Expand
Orbital-selective Mott phase in multiorbital models for alkaline iron selenides K1-xFe2-ySe2.
We study a multiorbital model for the alkaline iron selenides K(1-x)Fe(2-y)Se(2) using a slave-spin method. With or without ordered vacancies, we identify a metal-to-Mott-insulator transition at the… Expand
Fermi surface reconstruction and multiple quantum phase transitions in the antiferromagnet CeRhIn5
- L. Jiao, Ye Chen, +15 authors H. Yuan
- Physics, Medicine
- Proceedings of the National Academy of Sciences
- 5 January 2015
Significance Conventional, thermally driven continuous phase transitions are described by universal critical behavior that is independent of microscopic details of a specific material. An analogous… Expand
Local fluctuations in quantum critical metals
We show that spatially local, yet low-energy, fluctuations can play an essential role in the physics of strongly correlated electron systems tuned to a quantum critical point. A detailed microscopic… Expand
Quantum criticality and global phase diagram of magnetic heavy fermions
- Q. Si
- 1 December 2009
Quantum criticality describes the collective fluctuations of matter undergoing a second-order phase transition at zero temperature. It is being discussed in a number of strongly correlated electron… Expand
TOPICAL REVIEW: How do Fermi liquids get heavy and die?
We discuss non-Fermi liquid and quantum critical behaviour in heavy-fermion materials, focusing on the mechanism by which the electron mass appears to diverge at the quantum critical point. We ask… Expand
High Temperature Superconductivity in Iron Pnictides and Chalcogenides
Superconductivity develops in metals upon the formation of a coherent macroscopic quantum state of electron pairs. Iron pnictides and chalcogenides are materials that have high superconducting… Expand