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Quantum zigzag transition in ion chains.
It is argued that by means of a mapping to the Ising model in a transverse field, the quantum critical point is estimated in terms of the system parameters, and a finite, measurable deviation from the critical point predicted by the classical theory is found.
Large violation of the Wiedemann-Franz law in Luttinger liquids.
We show that in weakly disordered Luttinger liquids close to a commensurate filling the ratio of thermal conductivity kappa and electrical conductivity sigma can deviate strongly from the
Collective Edge Modes Near the Onset of a Graphene Quantum Spin Hall State
Graphene subject to a strong, tilted magnetic field exhibits an insulator-metal transition tunable by tilt-angle, attributed to the transition from a canted antiferromagnetic (CAF) to a ferromagnetic
Thermal conductivity of spin- 1 2 chains
We study the low-temperature transport properties of clean one-dimensional spin-$\frac{1}{2}$ chains coupled to phonons. Due to the presence of approximate conservation laws, the heat current decays
Spin-Valley Coherent Phases of the $\nu=0$ Quantum Hall State in Bilayer Graphene
Bilayer graphene (BLG) offers a rich platform for broken symmetry states stabilized by interactions. In this work we study the phase diagram of BLG in the quantum Hall regime at filling factor
Resistivity of Inhomogeneous Superconducting Wires
We study the contribution of quantum phase fluctuations in the superconducting order parameter to the low--temperature resistivity $\rho(T)$ of a dirty and inhomogeneous superconducting wire. In
Quantum structural phase transition in chains of interacting atoms
A quasi-one-dimensional system of trapped, repulsively interacting atoms (e.g., an ion chain) exhibits a structural phase transition from a linear chain to a zigzag structure, tuned by reducing the
We discuss superconductor to insulator and quantum Hall transitions which are first order in the clean limit. Disorder creates a nearly percolating network of the minority phase. Electrical transport
Magnetothermal transport in the spin-1/2 chains of copper pyrazine dinitrate.
The heat conductivity of the spin-1/2 chain compound copper pyrazine dinitrate Cu(C4H4N2)(NO3)2 shows a surprisingly strong dependence on the applied magnetic field B, characterized at low temperatures by two main features.