Resistively detected-NMR in triple-gate quantum point contact: magnetic field dependence

The influence of time-varying fields on the transport through a mesoscopic device has been investigated. This mesoscopic device is modeled as a quantum dot coupled to superconducting reservoirs via quantum point contact. The effect of a magnetic field and the Andreev reflection process were taken into account. The conductance was deduced by using Landuaer–Buttiker equation. A numerical calculation has been performed that shows a resonant tunneling behavior. Such investigation is important for fabricating photoelectron mesoscopic devices.

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Magnetic field and temperature dependence of an atomic force microscope-defined quantum point contact

Journal of Vacuum Science & Technology B Microelectronics Processing and Phenomena ◽

10.1116/1.1648065 ◽

2004 ◽

Vol 22 (2) ◽

pp. 570 ◽

Cited By ~ 8

Author(s):

G. Mori ◽

M. Lazzarino ◽

D. Ercolani ◽

G. Biasiol ◽

L. Sorba

Keyword(s):

Magnetic Field ◽

Temperature Dependence ◽

Atomic Force Microscope ◽

Point Contact ◽

Quantum Point Contact ◽

Atomic Force ◽

Quantum Point

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Quantum point contact in a magnetic field: Far-infrared resonant heating observed in photoconductivity

Applied Physics Letters ◽

10.1063/1.125260 ◽

1999 ◽

Vol 75 (20) ◽

pp. 3150-3152 ◽

Cited By ~ 4

Author(s):

R. J. Heron ◽

R. A. Lewis ◽

B. E. Kane ◽

G. R. Facer ◽

R. G. Clark ◽

...

Keyword(s):

Magnetic Field ◽

Point Contact ◽

Far Infrared ◽

Quantum Point Contact ◽

Quantum Point ◽

Resonant Heating

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Analysis of the angular distribution of electrons injected through a quantum point contact by use of a Green’s function with a weak-magnetic-field approximation

Physical Review B ◽

10.1103/physrevb.46.13220 ◽

1992 ◽

Vol 46 (20) ◽

pp. 13220-13233 ◽

Cited By ~ 15

Author(s):

Miyoshi Saito ◽

Motomu Takatsu ◽

Makoto Okada ◽

Naoki Yokoyama

Keyword(s):

Magnetic Field ◽

Angular Distribution ◽

Green’S Function ◽

Green's Function ◽

Weak Magnetic Field ◽

Point Contact ◽

Field Approximation ◽

Quantum Point Contact ◽

Quantum Point

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Effective Landé factors for an electrostatically defined quantum point contact in silicene

Scientific Reports ◽

10.1038/s41598-021-99074-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Bartłomiej Rzeszotarski ◽

Alina Mreńca-Kolasińska ◽

François M. Peeters ◽

Bartłomiej Szafran

Keyword(s):

Magnetic Field ◽

Point Contact ◽

Zeeman Splitting ◽

Orbit Coupling ◽

Quantum Point Contact ◽

Spin Orbit Coupling ◽

Spin Orbit ◽

Quantum Point ◽

Landé Factors ◽

Strong Spin

AbstractThe transconductance and effective Landé $$g^*$$ g ∗ factors for a quantum point contact defined in silicene by the electric field of a split gate is investigated. The strong spin–orbit coupling in buckled silicene reduces the $$g^*$$ g ∗ factor for in-plane magnetic field from the nominal value 2 to around 1.2 for the first- to 0.45 for the third conduction subband. However, for perpendicular magnetic field we observe an enhancement of $$g^*$$ g ∗ factors for the first subband to 5.8 in nanoribbon with zigzag and to 2.5 with armchair edge. The main contribution to the Zeeman splitting comes from the intrinsic spin–orbit coupling defined by the Kane–Mele form of interaction.

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MAGNETIC FIELD DEPENDENCE OF THE POINT-CONTACT SPECTRA OF CeNi5

International Journal of Modern Physics B ◽

10.1142/s0217979293000494 ◽

1993 ◽

Vol 07 (01n03) ◽

pp. 222-225 ◽

Cited By ~ 13

Author(s):

Y. NAIDYUK ◽

M. REIFFERS ◽

A. G. M. JANSEN ◽

I. K. YANSON ◽

P. WYDER ◽

...

Keyword(s):

Magnetic Field ◽

Intermetallic Compound ◽

Field Dependence ◽

Magnetic Field Dependence ◽

Point Contact ◽

Spin Fluctuations ◽

Point Contacts ◽

Second Derivatives ◽

Derivatives Of ◽

The Magnetic Field

The intermetallic compound CeNi 5, where Ce is not magnetic and in the maximum valence state, is an enhanced Pauli paramagnet in which spin fluctuations are present. For point contacts between a CeNi 5 single crystal and Cu, the second derivatives of the I-V characteristics reveal a maximum at low voltages (around 3 mV) which disappears in applied magnetic fields above 10 T. This behaviour in the point-contact spectra is ascribed to the quenching of spin fluctuations by the magnetic field.

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