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Emergent symmetry in quantum phase transition: From deconfined quantum critical point to gapless quantum spin liquid
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Comment on “Superconductivity at low density near a ferroelectric quantum critical point: Doped SrTiO 3 ”
Wölfle and Balatsky have proposed a microscopic pairing mechanism for doped SrTiO 3 (STO) based on the gradient coupling of electronic density to the soft transverse optical (TO) phonon mode. Since this coupling to TO phonons is usually weak, this conclusion is surprising, especially for a low-density superconductor such as STO, where the density of states is small. A crucial step in the argument made by Wölfle and Balatsky is that the displacement vector of the TO mode is not strictly perpendicular to the momentum vector, making a deformation coupling possible. We show that they have made a mistake in computing the eigenvector and have grossly overestimated this lack of orthogonality. When corrected, the coupling is negligible. We also use transport data to put upper bounds on the coupling constant which are much smaller than the estimate by Wölfle and Balatsky. Lastly, we also object to their use of the Eliashberg equation when the phonon frequency is larger than the Fermi energy.
Approaching the quantum critical point in a highly correlated all-in$-$all-out antiferromagnet
Abstract not provided
QCD equation of state matched to lattice data and exhibiting a critical point singularity
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Critical point fluctuations: Finite size and global charge conservation effects
Not Available
Fluctuation dynamics in a relativistic fluid with a critical point
Not Available
Real-time dynamics of Chern-Simons fluctuations near a critical point
Not Available
Dynamics of the O ( 4 ) critical point in QCD
Not Available
Deconfined Critical Point in a Doped Random Quantum Heisenberg Magnet
Not Available
Liquid-Vapor Critical Point and Coexistence Boundary of Platinum From Ab Initio Simulation.
Abstract not provided.
Constraining the Platinum Liquid-Vapor Phase Boundary and Critical Point with Fluid Flyer Experiments
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Constraining the platinum liquid-vapor phase boundary and critical point with fluid flyer experiments
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