Possible Pressure-Induced Charge-Density Wave Quantum Critical Point in LuPd2In

Single-gap s-Wave superconductivity near the charge-density-wave quantum critical point in CuxTiSe2.

The in-plane thermal conductivity kappa of the layered superconductor CuxTiSe2 was measured down to temperatures as low as Tc/40, at x=0.06 near where the charge-density-wave order vanishes. The absence of a residual linear term at T-->0 is strong evidence for conventional s-wave superconductivity in this system. This is further supported by the slow magnetic field dependence, also consistent w...

Strong anharmonicity induces quantum melting of charge density wave in 2H-NbSe_2 under pressure

Charge Density Wave and Quantum Fluctuations in a Molecular Crystal

We consider an electron-phonon system in two and three dimensions on square, hexagonal and cubic lattices. The model is a modification of the standard Holstein model where the optical branch is appropriately curved in order to have a reflection positive Hamiltonian. Using infrared bounds together with a recent result on the coexistence of long-range order for electron and phonon fields, we prov...

Quantum Hall Effect in chiral d - wave charge density waves

We study the electromagnetic response of a chiral dxy + id x 2 −y 2 charge density wave state. Due to parity (P) and time reversal (T) violation, Chern-Simons terms emerge in the effective action of the U(1) gauge field. As a consequence electric and magnetic fields are coupled providing the possibility of observing the Spontaneous Quantum Hall Effect i.e. generation of Hall voltage via the sol...

Field-induced quantum critical point in CeCoIn5.

The resistivity of the heavy-fermion superconductor CeCoIn5 was measured as a function of temperature, down to 25 mK and in magnetic fields of up to 16 T applied perpendicular to the basal plane. With increasing field, we observe a suppression of the non-Fermi liquid behavior, rho approximately T, and the development of a Fermi liquid state, with its characteristic rho=rho(0)+AT2 dependence. Th...