Low-frequency Raman response near the Ising-nematic quantum critical point: A memory-matrix approach

Enhancement of superconductivity near a nematic quantum critical point.

We consider a low T_{c} metallic superconductor weakly coupled to the soft fluctuations associated with proximity to a nematic quantum critical point (NQCP). We show that (1) a BCS-Eliashberg treatment remains valid outside of a parametrically narrow interval about the NQCP, (2) the symmetry of the superconducting state (d wave, s wave, p wave) is typically determined by the noncritical interac...

Ising Nematic Quantum Critical Point in a Metal: A Monte Carlo Study

Yoni Schattner, Samuel Lederer, Steven A. Kivelson, and Erez Berg Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot, 76100, Israel Department of Physics, Stanford University, Stanford, California 94305, USA Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA (Received 26 November 2015; revised manuscript received 2 J...

Experimental Observables Near a Nematic Quantum Critical Point in the Pnictide and Cuprate Superconductors

Fermi Liquid near a Quantum Critical Point *

We investigate the approach to the quantum critical point of a Pomeranchuk instability from the symmetric, disordered side of the phase diagram. In the low-temperature limit, a Fermi liquid description of the metal is possible and becomes exact for T → 0. We discuss in detail which features of the approach to quantum criticality can be captured within Fermi liquid theory and which are outside o...

Quench dynamics near a quantum critical point

We study the dynamical response of a system to a sudden change of the tuning parameter starting or ending at the quantum critical point. In particular, we analyze the scaling of the excitation probability, number of excited quasiparticles, heat and entropy with the quench amplitude, and the system size. We extend the analysis to quenches with arbitrary power law dependence on time of the tuning...