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Coherent long-range magnetic bound states in a superconductor
Magnetic atoms embedded in a niobium selenide superconductor are shown to give rise to a long-range coherent bound state extending tens of nanometres.
Geometrical engineering of a two-band Chern insulator in two dimensions with arbitrary topological index
Two-dimensional 2-bands insulators breaking time reversal symmetry can present topological phases indexed by a topological invariant called the Chern number. Here we first propose an efficient…
Interplay of electromagnetic noise and Kondo effect in quantum dots
We investigate the influence of an electromagnetic environment, characterized by a finite impedance Z(omega), on the Kondo effect in quantum dots. The circuit voltage fluctuations couple to charge…
Quantum criticality in a double-quantum-dot system.
The realization of the quantum-critical non-Fermi-liquid state, originally discovered within the two-impurity Kondo model, in double-quantum-dot systems is discussed, and transport and scaling properties in the vicinity of the critical point are discussed.
Interplay between classical magnetic moments and superconductivity in quantum one-dimensional conductors: toward a self-sustained topological Majorana phase.
It is shown that at low energy and temperature the magnetic moments and the electrons become strongly entangled and that a magnetic spiral structure emerges.
Exchange interaction between single magnetic adatoms.
The magnetic coupling between single Co atoms adsorbed on a copper surface is determined by probing the Kondo resonance using low-temperature scanning tunneling spectroscopy and adding a third atom to the antiferromagnetically coupled dimer results in the formation of a collective correlated state.
Spin and Majorana polarization in topological superconducting wires.
The local Majorana polarization is correlated to the transverse spin polarization, and it is proposed to test the presence of Majorana fermions in a 1D system by a spin-polarized density of states measurement.
Majorana edge states in interacting one-dimensional systems.
We show that one-dimensional electron systems in the proximity of a superconductor that support Majorana edge states are extremely susceptible to electron-electron interactions. Strong interactions…
Magnetic ordering of nuclear spins in an interacting two-dimensional electron gas
We investigate the magnetic behavior of nuclear spins embedded in a two-dimensional (2D) interacting electron gas using a Kondo lattice model description. We derive an effective magnetic Hamiltonian…
Orbital frustration at the origin of the magnetic behavior in LiNiO2.
It is shown that below T(of) approximately 400 K, an orbitally frustrated state characteristic of the triangular lattice is established, which gives a solution to the long-standing controversial problem of the magnetic behavior in LiNiO2.