272 citations · 1.1k across the 27 of their papers we have counts for
6 papers · 1 filter
External field control of donor electron exchange at the Si/SiO2 interface
M. J. Calderon, Belita Koiller, S. Das Sarma
We analyze several important issues for the single- and two-qubit operations in Si quantum computer architectures involving P donors close to a SiO2 interface. For a single donor,…
Re-entrant ferromagnetism in a generic class of diluted magnetic semiconductors
M. J. Calderon, S. Das Sarma
Considering a general situation where a semiconductor is doped by magnetic impurities leading to a carrier-induced ferromagnetic exchange coupling between the impurity moments, we…
Single electron spin and its coherence in Si quantum computer architecture
M. J. Calderon, Belita Koiller, S. Das Sarma
The possibility of performing single spin measurements in Si-based quantum computers through electric field control of electrons bound to double donors near a barrier interface is…
Mean field theory for double-perovskites
L. Brey, M. J. Calderon, S. Das Sarma +1
A mean field approximation of a model for double perovskites that takes into account the coupling between itinerant electron spins and localized spins is developed. As in previousl…
Theory of carrier mediated ferromagnetism in dilute magnetic oxides
M. J. Calderon, S. Das Sarma
We analyze the origin of ferromagnetism as a result of carrier mediation in diluted magnetic oxide semiconductors in the light of the experimental evidence reported in the literatu…
Magnetic field-assisted manipulation and entanglement of Si spin qubits
M. J. Calderon, Belita Koiller, S. Das Sarma
Architectures of donor-electron based qubits in silicon near an oxide interface are considered theoretically. We find that the precondition for reliable logic and read-out operatio…