scholarly journals COOPER PAIRING IN SPIN-POLARIZED FERMI SYSTEMS

1980 ◽  
Vol 41 (C7) ◽  
pp. C7-19-C7-26 ◽  
Author(s):  
A. J. Leggett
Keyword(s):  
Cooper Pairing ◽  
Fermi Systems ◽  
Spin Polarized

scholarly journals Zero-temperature relaxation in spin-polarized Fermi systems

1997 ◽  
Vol 23 (5) ◽  
pp. 411-419 ◽  
Author(s):  
A. E. Meyerovich ◽  
J. H. Naish ◽  
J. R. Owers-Bradley ◽  
A. Stepaniants
Keyword(s):  
Zero Temperature ◽  
Fermi Systems ◽  
Spin Polarized ◽  
Temperature Relaxation

Spin dynamics in spin-polarized Fermi systems

1995 ◽  
Vol 101 (3-4) ◽  
pp. 803-808
Author(s):  
A. E. Meyerovich ◽  
S. Stepaniants ◽  
F. Laloë
Keyword(s):  
Spin Dynamics ◽  
Fermi Systems ◽  
Spin Polarized

scholarly journals Transverse dynamics and relaxation in spin-polarized or two-level Fermi systems

1993 ◽  
Vol 47 (5) ◽  
pp. 2897-2900 ◽  
Author(s):  
A. E. Meyerovich ◽  
K. A. Musaelian
Keyword(s):  
Fermi Systems ◽  
Spin Polarized

scholarly journals Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene

Science ◽  
2022 ◽  
Author(s):  
Haoxin Zhou ◽  
Ludwig Holleis ◽  
Yu Saito ◽  
Liam Cohen ◽  
William Huynh ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Order Parameter ◽  
Degrees Of Freedom ◽  
Bilayer Graphene ◽  
Zero Magnetic Field ◽  
Cooper Pairing ◽  
Two Dimensional ◽  
Van Hove Singularity ◽  
Spin Polarized ◽  
Spin Triplet

In conventional superconductors, Cooper pairing occurs between electrons of opposite spin. We observe spin-polarized superconductivity in Bernal bilayer graphene when doped to a saddle-point van Hove singularity generated by large applied perpendicular electric field. We observe a cascade of electrostatic gate-tuned transitions between electronic phases distinguished by their polarization within the isospin space defined by the combination of the spin and momentum-space valley degrees of freedom. Although all of these phases are metallic at zero magnetic field, we observe a transition to a superconducting state at finite B ‖ ≈ 150mT applied parallel to the two-dimensional sheet. Superconductivity occurs near a symmetry breaking transition, and exists exclusively above the B ‖ -limit expected of a paramagnetic superconductor with the observed transition temperature T C ≈ 30mK, consistent with a spin-triplet order parameter.

scholarly journals New mechanism and exact theory of superconductivity from strong repulsive interaction

2021 ◽  
Vol 7 (30) ◽  
pp. eabh2233
Author(s):  
Valentin Crépel ◽  
Liang Fu
Keyword(s):  
Pairing Symmetry ◽  
Charge Carriers ◽  
General Mechanism ◽  
Repulsive Interaction ◽  
Fermi Systems ◽  
Fermi Temperature ◽  
Spin Polarized ◽  
Atomic Limit ◽  
Theory Of Superconductivity ◽  
Quantitative Formula

We introduce a general mechanism for superconductivity in Fermi systems with strong repulsive interaction. Because kinetic terms are small compared to the bare repulsion, the dynamics of charge carriers is constrained by the presence of other nearby carriers. By treating kinetic terms as a perturbation around the atomic limit, we show that pairing can be induced by correlated multiparticle tunneling processes that favor two itinerant carriers to be close together. Our analytically controlled theory provides a quantitative formula relating Tc to microscopic parameters, with maximum Tc reaching about 10% of the Fermi temperature. Our work demonstrates a powerful method for studying strong coupling superconductivity with unconventional pairing symmetry. It also offers a realistic new route to realizing finite angular momentum superfluidity of spin-polarized fermions in optical lattice.

Spin-polarized Scanning Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 768-769
Author(s):  
Kazuyuki Koike ◽  
Hideo Matsuyama
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Speed ◽  
Magnetic Thin Films ◽  
Electron Spin Polarization ◽  
Acquisition Time ◽  
Magnetization Direction ◽  
Spin Polarized ◽  
Conventional Methods ◽  
Scanning Electron

Spin-polarized scanning electron microscopy (spin SEM), where the secondary electron spin polarization is used as the image signal, is a novel technique for magnetic domain observation. Since its first development by Koike and Hayakawa in 1984, several laboratories have extensively studied this technique and have greatly improved its capability for data extraction and its range of applications. This paper reviews the progress over the last few years.Almost all the high expectations initially held for spin SEM have been realized. A spatial resolution of several hundreds angstroms has been attained, which is nearly one order of magnitude higher than that of conventional methods for thick samples. Quantitative analysis of magnetization direction has been performed more easily than with conventional methods. Domain observation of the surface of three-dimensional samples has been confirmed to be possible. One of the drawbacks, a long image acquisition time, has been eased by combining highspeed image-signal processing with high speed scanning, although at the cost of image quality. By using spin SEM, the magnetic structure of a 180 degrees surface Neel wall, magnetic thin films, multilayered films, magnetic discs, etc., have been investigated.

Investigation of spin-polarized carrier injection effect in|YBa2Cu3O7/SrTiO3/La0.67/Sr0.33MnO3 and YBa2Cu3O7/La0.67Sr0.33MnO3 heterostructures

2001 ◽  
Vol 11 (PR11) ◽  
pp. Pr11-53-Pr11-57
Author(s):  
B. Vengalis ◽  
V. Plausinaitiene ◽  
A. Abrutis ◽  
Z. Saltyte ◽  
R. Butkute ◽  
...  
Keyword(s):  
Carrier Injection ◽  
Spin Polarized ◽  
Injection Effect
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