arXiv subjects

Christopher Triola

Publications and source records attributed to Christopher Triola.

20 records · Page 2Linked to original sources

arXiv2014

Effect of a spin-active interface on proximity-induced superconductivity in topological insulators

We examine the effect of a spin-active interface on the symmetry of proximity-induced superconducting pairing amplitudes in topological insulators. We develop a model to investigate the leading order contribution to the pairing amplitude considering 3 different kinds of spin-active interfaces: 1) those that induce spin-dependent scattering phases, 2) those that flip the spin of incident electrons, and 3) interfaces that both induce spin-dependent phases and flip the spins of incident electrons. We find that in cases (1) and (3) odd-frequency triplet pairing is induced in the TI while for case (2) no odd-frequency pairing is induced to leading order. We compare our results to those for normal metals and ferromagnetic materials finding that the nontrivial spin structure of the TI leads to qualitatively different behavior.

cond-mat.supr-con↗

arXiv2011

Astrophysical Consequences of a Neutrinophilic Two-Higgs-Doublet Model

In a recently proposed neutrinophilic two-Higgs doublet model, the low-energy (sub-MeV) effective theory consists of a real scalar with a vev of O(0.1) eV and three Dirac neutrinos. Other models could lead to the same low energy theory. In this Brief Report, we study constraints on the parameter space of the model, including vacuum stability, unitarity, perturbativity and the effects on the invisible Z width. Interestingly, we find that all neutrinos become massless at temperatures above approximately 1000 K, but can find no phenomenological effects of this finding. The most direct test of the model is that it predicts that in a galactic supernova, the energy distributions of the electron, muon and tau neutrinos will be Fermi-Dirac with identical temperatures, unlike the conventional distributions.

hep-ph↗