Journal
NUCLEAR PHYSICS B
Volume 960, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nuclphysb.2020.115192
Keywords
-
Categories
Funding
- POR Calabria FESR-FSE 2014/2020 - Linea B) Azione 10.5.12 [A.5.1]
- Italy's MIUR PRIN project TOP-SPIN [PRIN 20177SL7HC]
Ask authors/readers for more resources
We derive the topological Kondo Hamiltonian describing a Y junction of three XX-spin chains connected to outer quantum Ising chains with different tilting angles for the Ising axis. We show that the tilting angles in the spin models play the role of the phases of the superconducting order parameters at the interfaces between bulk superconductors and one-dimensional conducting normal electronic wires. As a result, different tilting angles induce nonzero equilibrium spin (super)currents through the junction. Employing the renormalization group approach to the topological Kondo model, we derive the scaling formulas for the equilibrium spin currents. We argue that, by monitoring the crossover in the currents induced by the Kondo effect, it is possible to estimate the Kondo screening length. In particular, we prove how it is possible to tune the Kondo length by acting on the applied phases only; this enables us to map out the scaling properties by just tuning the tilting angles and the Kondo length accordingly. (C) 2020 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available