1964 Picture of the uranium industry in the capitalist countries

Andreev, V. D.

doi:10.1007/bf01126453

Cited by 33 publications

(65 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a consequence, the electrons and holes are called Dirac fermions; their appearance was predicted in the silicene, germanene or dichalcogenides [8,9,10,11,12,13,14] and emerge naturally from the tight-binding model for a generic hexagonal lattice in the low-energy regime [15], as shown in Figure 1. This pseudo-relativistic description is restricted to the chiral limit, i.e., to vanishing rest mass leading to interesting additional features: when Dirac fermions are compared with ordinary electrons placed in magnetic fields, their behavior leads to new physical phenomena such as the anomalous integer quantum Hall effect, the Zitterbewegung and the Klein paradox [8,16].…”

Section: Introductionmentioning

confidence: 99%

Graphene coherent states

Díaz-Bautista

2017

Eur. Phys. J. Plus

View full text Add to dashboard Cite

In this paper we will construct the coherent states for a Dirac electron in graphene placed in a constant homogeneous magnetic field which is orthogonal to the graphene surface. First of all, we will identify the appropriate annihilation and creation operators. Then, we will derive the coherent states as eigenstates of the annihilation operator, with complex eigenvalues. Several physical quantities, as the Heisenberg uncertainty product, probability density and mean energy value, will be as well explored.

show abstract

Section: Introductionmentioning

confidence: 99%

Graphene coherent states

Díaz-Bautista

2017

Eur. Phys. J. Plus

View full text Add to dashboard Cite

show abstract

“…This process, known to day as an Andreev reflection (Andreev, 1964), was in fact first described by de Gennes and Saint James (De-Gennes and James, 1963) (and in a follow up paper by Saint James (Saint-James, 1964)) . The two independent original papers show solutions of the Bogoliubov -de Gennes equations (De-Gennes, 1966), based on the Bogolubov transformation (Bogoliubov, 1958), for the pair potential near an N/S interface.…”

Section: Introductionmentioning

confidence: 99%

Andreev–Saint-James reflections: A probe of cuprate superconductors

2005

View full text Add to dashboard Cite

Electrical transport through a normal metal / superconductor contact at biases smaller than the energy gap can occur via the reflection of an electron as a hole of opposite wave vector. The same mechanism of electron-hole reflection gives rise to low energy states at the surface of unconventional superconductors having nodes in their order parameter. The occurrence of electron-hole reflections at normal metal / superconductor interfaces was predicted independently by Saint James and de Gennes and by Andreev, and their spectroscopic features discussed in detail by Saint James in the early sixties. They are generally called Andreev reflections but, for that reason, we call them Andreev -Saint James (ASJ) reflections. We present a historical review of ASJ reflections and spectroscopy in conventional superconductors, and review their application to the High Tc cuprates. The occurrence of ASJ reflections in all studied cuprates is well documented for a broad range of doping levels, implying that there is no large asymmetry between electrons and holes near the Fermi level in the superconducting state. In the underdoped regime, where the pseudo-gap phenomenon has been observed by other methods such as NMR, ARPES and Giaever tunneling, gap values obtained from ASJ spectroscopy are smaller than pseudo-gap values, indicating a lack of coherence in the pseudo-gap energy range. Low energy surface bound states have been observed in all studied hole doped cuprates, in agreement with a dominant d-wave symmetry order parameter. Results are mixed for electron doped cuprates. In overdoped Y Ba 2 Cu 3 O 7−δ (δ < 0.08) and La 2−x SrxCuO 4 , ASJ spectroscopy is consistent with the presence of an additional imaginary component of the order parameter. Results of ASJ spectroscopy under applied magnetic fields are also reviewed. A short section at the end is devoted to some recent results on spin effects. * Electronic address: guyde@tau.ac.il 2

show abstract

“…In this section we outline the calculation of the coefficients of Andreev reflection [17] at the NS interface. These are essentially unchanged by the introduction of a spin orbit interaction in the materials forming the junction.…”

Section: B Andreev Scattering At the Ns Interfacementioning

confidence: 99%

Quantum Interference and the Spin Orbit Interaction in Mesoscopic Normal-Superconducting Junctions

1996

View full text Add to dashboard Cite

We calculate the quantum correction to the classical conductance of a disordered mesoscopic normal-superconducting (NS) junction in which the electron spatial and spin degrees of freedom are coupled by an appreciable spin orbit interaction. We use random matrix theory to describe the scattering in the normal part of the junction and consider both quasi-ballistic and diffusive junctions. The dependence of the junction conductance on the Schottky barrier transparency at the NS interface is also considered. We find that the quantum correction is sensitive to the breaking of spin rotation symmetry even when the junction is in a magnetic field and time reversal symmetry is broken. We demonstrate that this sensitivity is due to quantum interference between scattering processes which involve electrons and holes traversing closed loops in the same direction. We explain why such processes are sensitive to the spin orbit interaction but not to a magnetic field. Finally we consider the effect of the spin orbit interaction on the phenomenon of "reflectionless tunnelling." 74.80. Fp,74.50+r,72.10.Bg

show abstract

1964 Picture of the uranium industry in the capitalist countries

Cited by 33 publications

References 8 publications

Graphene coherent states

Graphene coherent states

Andreev–Saint-James reflections: A probe of cuprate superconductors

Quantum Interference and the Spin Orbit Interaction in Mesoscopic Normal-Superconducting Junctions

Contact Info

Product

Resources

About