scholarly journals Generation and detection of spin-orbit coupled neutron beams

2019 ◽  
Vol 116 (41) ◽  
pp. 20328-20332 ◽  
Author(s):  
Dusan Sarenac ◽  
Connor Kapahi ◽  
Wangchun Chen ◽  
Charles W. Clark ◽  
David G. Cory ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Quantum Optics ◽  
Neutron Spin ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Basic Tool ◽  
Topological Materials ◽  
Neutron Beams ◽  
Neutron Optics ◽  
Spin Filters

Spin-orbit coupling of light has come to the fore in nanooptics and plasmonics, and is a key ingredient of topological photonics and chiral quantum optics. We demonstrate a basic tool for incorporating analogous effects into neutron optics: the generation and detection of neutron beams with coupled spin and orbital angular momentum. The 3He neutron spin filters are used in conjunction with specifically oriented triangular coils to prepare neutron beams with lattices of spin-orbit correlations, as demonstrated by their spin-dependent intensity profiles. These correlations can be tailored to particular applications, such as neutron studies of topological materials.

scholarly journals Type-II Ising pairing in few-layer stanene

Science ◽  
2020 ◽  
Vol 367 (6485) ◽  
pp. 1454-1457 ◽  
Author(s):  
Joseph Falson ◽  
Yong Xu ◽  
Menghan Liao ◽  
Yunyi Zang ◽  
Kejing Zhu ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Upper Critical Field ◽  
Distinct Type ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Type Ii ◽  
Spin Orbit ◽  
Pairing Mechanism ◽  
Topological Materials ◽  
Ultralow Temperature

Spin-orbit coupling has proven indispensable in the realization of topological materials and, more recently, Ising pairing in two-dimensional superconductors. This pairing mechanism relies on inversion symmetry–breaking and sustains anomalously large in-plane polarizing magnetic fields whose upper limit is predicted to diverge at low temperatures. Here, we show that the recently discovered superconductor few-layer stanene, epitaxially strained gray tin (α-Sn), exhibits a distinct type of Ising pairing between carriers residing in bands with different orbital indices near the Γ-point. The bands are split as a result of spin-orbit locking without the participation of inversion symmetry–breaking. The in-plane upper critical field is strongly enhanced at ultralow temperature and reveals the predicted upturn.

SPONTANEOUS SPIN POLARIZATION OF ELECTRONS IN SiGe/Si HETEROSTRUCTURES

2010 ◽  
Vol 09 (05) ◽  
pp. 503-509
Author(s):  
A. JOHN PETER
Keyword(s):  
Zero Magnetic Field ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Resonant Level ◽  
Electron Transmission ◽  
Rashba Spin ◽  
Spin Polarized ◽  
Spin Filters ◽  
Spin Injectors ◽  
The One

The spin-dependent electron transmission phenomenon in an SiGe/Si/SiGe resonant semiconductor heterostructure is employed theoretically to investigate the output transmission current polarization at zero magnetic field. Transparency of electron transmission is calculated as a function of electron energy as well as the well width, within the one electron band approximation along with the spin-orbit interaction. Enhanced spin-polarized resonant tunneling in the heterostructure due to Dresselhaus and Rashba spin-orbit coupling induced splitting of the resonant level is observed. We predict that a spin-polarized current spontaneously emerges in this heterostructure and we estimate theoretically that the polarization can reach 100%. This effect could be employed in the fabrication of spin filters, spin injectors, and detectors based on nonmagnetic semiconductors.

Angular momentum and spin-orbit coupling for microwave photons

1994 ◽  
Vol 104 (4-6) ◽  
pp. 229-233 ◽  
Author(s):  
M. Kristensen ◽  
M.W. Beijersbergen ◽  
J.P. Woerdman
Keyword(s):  
Angular Momentum ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit

SHIFT OF THE ISCO AND GRAVITOMAGNETIC CLOCK EFFECT DUE TO GRAVITATIONAL SPIN–ORBIT COUPLING

2007 ◽  
Vol 16 (11) ◽  
pp. 1863-1869 ◽  
Author(s):  
PABEL SHAHREAR ◽  
S. B. FARUQUE
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Test Particle ◽  
Circular Orbit ◽  
Orbit Coupling ◽  
Gravitational Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Stable Circular Orbit ◽  
Innermost Stable Circular Orbit

Considering a gravitational coupling between the spin and the orbital angular momentum of a spinning test particle orbiting a central massive body, we derive two particular consequences: (1) the influence of the coupling on the location of the innermost stable circular orbit and (2) the gravitomagnetic clock effect due to this coupling. The previous result does not seem to exist for the former, while for the latter we arrive at a result that coincides with what we think is the most accurate.

Sign in / Sign up

Export Citation Format

Share Document