Anderson model with spin-flip-associated tunneling

Lin, Kao-Chin; Chuu, Der–San

doi:10.1103/physrevb.72.125314

Cited by 9 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact, as will be shown in the following, is a consequence of the neutral charge state of the mobile BI complex. On the other hand, different structures for the BI complex are proposed by theoretical studies [7,8,12,13]. In general, it was demonstrated that the structure, the formation energy, and the migration barrier of these complexes strongly depend on the charge state.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Atomistic Mechanism of Boron Diffusion in Silicon

et al. 2006

View full text Add to dashboard Cite

B diffuses in crystalline Si by reacting with a Si self-interstitial (I) with a frequency g and so forming a fast migrating BI complex that can migrate for an average length lambda. We experimentally demonstrate that both g and lambda strongly depend on the free hole concentration p. At low p, g has a constant trend and lambda increases with p, while at high p, g has a superlinear trend and lambda decreases with p. This demonstrates that BI forms in the two regimes by interaction with neutral and double positive I, respectively, and its charge state has to change by interaction with free holes before diffusing.

show abstract

mentioning

confidence: 99%

“…Neutral and negatively and positively charged BI complexes were considered, but a general consensus on which one is the most relevant for diffusion has not been reached yet (neutral according to Refs. [8,13], negative according to Ref. [12]).…”

mentioning

confidence: 99%

Atomistic Mechanism of Boron Diffusion in Silicon

et al. 2006

View full text Add to dashboard Cite

show abstract

“…Spin-flip assisted tunneling has received much less attention. 21,23 In the usual Anderson Hamiltonian, spin is conserved during tunneling and this leads to Kondo correlations at low temperatures. We now show that, despite the fact that Eq.…”

Section: Modelmentioning

confidence: 99%

From Coulomb blockade to the Kondo regime in a Rashba dot

2007

View full text Add to dashboard Cite

We investigate the electronic transport in a quantum wire with localized Rashba interaction. The Rashba field forms quasibound states that couple to the continuum states with an opposite spin direction. The presence of this Rashba dot causes Fano-like antiresonances and dips in the wire's linear conductance. The Fano line shape arises from the interference between the direct transmission channel along the wire and the hopping through the Rashba dot. Due to the confinement, we predict the observation of large charging energies in the local Rashba region, which lead to Coulomb-blockade effects in the transport properties of the wire. Importantly, the Kondo regime can be achieved with a proper tuning of the Rashba interaction, giving rise to an oscillating linear conductance for a fixed occupation of the Rashba dot.

show abstract

“…Moreover, for magnetic tunnel junctions the spin-flip processes suppress the tunnel magnetoresistance [32,33], but in general the spin-polarized current depends on the magnetic configuration of both leads [34]. Also the conductance of an interacting QD in the presence of spin-flip tunnelling is suppressed [35]. For a magnetic QD with time-dependent pulsed bias voltage and attached to normal and ferromagnetic leads the spin-flip scattering influences the amplitude of the quantum beats in the total charge and spin currents, [36]-both currents are suppressed in that case.…”

Section: Introductionmentioning

confidence: 99%

Spin and charge pumping in a quantum wire: the role of spin-flip scattering and Zeeman splitting

Kwapiński

Taranko²

2011

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

We investigate theoretically charge and spin pumps based on a linear configuration of quantum dots (quantum wire) which are disturbed by an external time-dependent perturbation. This perturbation forms an impulse which moves as a train pulse through the wire. It is found that the charge pumped through the system depends non-monotonically on the wire length, N. In the presence of the Zeeman splitting pure spin current flowing through the wire can be generated in the absence of charge current. Moreover, we observe electron pumping in a direction which does not coincide with the propagation direction of the pulse and the spin pumping direction (spin-charge separation). Additionally, on-site spin-flip processes significantly influence electron transport through the system and can also reverse the charge current direction.

show abstract

Anderson model with spin-flip-associated tunneling

Cited by 9 publications

References 26 publications

Atomistic Mechanism of Boron Diffusion in Silicon

Atomistic Mechanism of Boron Diffusion in Silicon

From Coulomb blockade to the Kondo regime in a Rashba dot

Spin and charge pumping in a quantum wire: the role of spin-flip scattering and Zeeman splitting

Contact Info

Product

Resources

About