Electron transfer between regions of quasi-two-dimensional and three-dimensional dynamics in semiconductor microstructures

Kriman, A. M.; Ruden, P.P.

doi:10.1103/physrevb.32.8013

Cited by 28 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed the specific methods of e.m. field theory ae often used for solving elegantly some quantum mechanical problems. Among many examples are the path integral method [13], the formalism developed by Albeverio et al [14] in connection with some solvable models in quantum mechanics, the treatment of electron propagation in microelectronic devices [15].…”

Section: Discussionmentioning

confidence: 99%

Quantum Features of Microwave Propagation in a Rectangular Waveguide

Marinescu

Nistor

1990

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

The formal analogy between the distribution of the electromagnetic field in waveguides and microwave cavities and quantum mechanical probability distributions is put into evidence. A waveguide of a cut-off frequency a) c acts on an electromagnetic wave as a quantum potential barrier U g = hco c . A non-habitual time independent Schrödinger equation, describing guided wave propagation, is established.

show abstract

Section: Discussionmentioning

confidence: 99%

Quantum Features of Microwave Propagation in a Rectangular Waveguide

Marinescu

Nistor

1990

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

show abstract

“…A rigorous treatment of this problem would require an accurate modeling of the three-to one-dimensional transition between the bulk ferromagnetic contacts (regions I and III) and the quantum wire semiconductor channel (region II) [17,18]. However, a one-dimensional transport model to calculate the transmission coefficient through the structure is known to be a very good approximation when the Fermi wave number in the ferromagnetic contacts is much greater than the inverse of the transverse dimensions of the quantum wire [19,20].…”

Section: Transmission Through the Interferometermentioning

confidence: 99%

Phase-coherent quantum mechanical spin transport in a weakly disordered quasi-one-dimensional channel

Cahay

Bandyopadhyay

2004

Phys. Rev. B

View full text Add to dashboard Cite

A transfer matrix technique is used to model phase coherent spin transport in the weakly disordered quasi one-dimensional channel of a gate-controlled electron spin interferometer [Datta and Das, Appl. Phys. Lett., 56, 665 (1990)]. It includes the effects of an axial magnetic field in the channel of the interferometer (caused by the ferromagnetic contacts), a Rashba spin-orbit interaction, and elastic (non-magnetic) impurity scattering. We show that in the presence of the axial magnetic field, non-magnetic impurities can cause spin relaxation in a manner similar to the Elliott-Yafet mechanism. The amplitudes and phases of the conductance oscillations of the interferometer, and the degree of spin-conductance polarization, are found to be quite sensitive to the height of the interface barrier at the contact, as well as the strength, locations and nature (attractive or repulsive) of just a few elastic non-magnetic impurities in the channel. This can seriously hinder practical applications of spin interferometers.

show abstract

“…A rigorous treatment of this problem would require an accurate modeling of the three-to one-dimensional transition between the bulk ferromagnetic contacts ͑regions I and III͒ and the quantum wire semiconductor channel ͑region II͒. 9,10 However, a onedimensional transport model to calculate the transmission coefficient through the structure is known to be a very good approximation when the Fermi wave number in the ferromagnetic contacts is much larger than the inverse of the transverse dimensions of the quantum wire. 11,12 This is always the case with metallic contacts.…”

Section: Transmission Through the Interferometermentioning

confidence: 99%

Conductance modulation of spin interferometers

Cahay

Bandyopadhyay

2003

Phys. Rev. B

View full text Add to dashboard Cite

We study the conductance modulation of gate controlled electron spin interferometers ͑also known as spin field effect transistors͒ based on the Rashba spin-orbit coupling effect. It is found that the modulation is dominated by Ramsauer ͑or Fabry-Perot͒ type transmission resonances rather than the Rashba effect in typical structures. These transmission resonances are due to reflections at the interferometer's contacts caused by large interface potential barriers and effective mass mismatch between the contact material and the semiconductor. They are particularly strong in quasi-one-dimensional structures which, in fact, are preferred for spin interferometers because of the energy independence of the spin precession angle. Thus, unless particular care is taken to eliminate Ramsauer resonances by proper contact engineering, any observed conductance modulation of spin interferometers may not have its origin in the Rashba effect.

show abstract

Electron transfer between regions of quasi-two-dimensional and three-dimensional dynamics in semiconductor microstructures

Cited by 28 publications

References 4 publications

Quantum Features of Microwave Propagation in a Rectangular Waveguide

Quantum Features of Microwave Propagation in a Rectangular Waveguide

Phase-coherent quantum mechanical spin transport in a weakly disordered quasi-one-dimensional channel

Conductance modulation of spin interferometers

Contact Info

Product

Resources

About