452 research outputs found
Giant Magnetochiral Anisotropy in Weyl-semimetal WTe2 Induced by Diverging Berry Curvature
The concept of Berry curvature is essential for various transport phenomena.
However, an effect of the Berry curvature on magnetochiral anisotropy, i.e.
nonreciprocal magneto-transport, is still elusive. Here, we report the Berry
curvature originates the large magnetochiral anisotropy. In Weyl-semimetal
WTe2, we observed the strong enhancement of the magnetochiral anisotropy when
the Fermi level is located near the Weyl points. Notably, the maximal figure of
merit reaches , which
is the largest ever reported in bulk materials. Our semiclassical calculation
shows that the diverging Berry curvature at the Weyl points strongly enhances
the magnetochiral anisotropy.Comment: 26 page
Ultrabright narrow-band telecom two-photon source for long-distance quantum communication
We demonstrate an ultrabright narrow-band two-photon source at the 1.5 -\mu m
telecom wavelength for long-distance quantum communication. By utilizing a
bow-tie cavity, we obtain a cavity enhancement factor of . Our
measurement of the second-order correlation function reveals
that the linewidth of MHz has been hitherto unachieved in the 1.5 -\mu m
telecom band. This two-photon source is useful for obtaining a high absorption
probability close to unity by quantum memories set inside quantum repeater
nodes. Furthermore, to the best of our knowledge, the observed spectral
brightness of pairs/(sMHzmW) is also the
highest reported over all wavelengths.Comment: 11 pages, 4 figures, 2 table
Fabrication of biodegradable scaffolds by use of self-assembled magnetic sugar particles as a casting template
Proceedings of the 2008 IEEE International Conference on Robotics and Automation / 2008 IEEE International Conference on Robotics and Automation, Pasadena, CA, USA, May 19-23, 200
- …