Intervalley scattering, long-range disorder, and effective time reversal symmetry breaking in graphene [PDF]
Phys. Rev. Lett. vol. 97, 196804 (2006), 2006 We discuss the effect of certain types of static disorder, like that induced by curvature or topological defects, on the quantum correction to the conductivity in graphene. We find that when the intervalley scattering time is long or comparable to $\tau_{\phi}$, these defects can induce an effective time reversal symmetry breaking of the hamiltonian ...
arxiv +1 more source
Discovery of Spherules of Likely Extrasolar Composition in the Pacific Ocean Site of the CNEOS 2014-01-08 (IM1) Bolide [PDF]
arXiv, 2023 We have conducted an extensive towed-magnetic-sled survey during the period 14-28 June, 2023, over the seafloor centered around the calculated path of the bolide CNEOS 2014-01-08 (IM1) about 85 km north of Manus Island, Papua New Guinea. We found about 700 spherules of diameter 0.05-1.3 millimeters in our samples, of which 57 were analyzed so far.
arxiv
Engineering-Economic Evaluation of Diffractive Non-Line-Of-Sight Backhaul (e3nb): A Techno-economic Model for 3D Wireless Backhaul Assessment [PDF]
arXiv, 2021 Developing ways to affordably deliver broadband connectivity is one of the major issues of our time. In challenging deployment locations with irregular terrain, traditional Clear-Line-Of-Sight (CLOS) wireless links can be uneconomical to deploy, as the number of required towers make infrastructure investment unviable.
arxiv
Electronic Properties of Two-Dimensional Carbon [PDF]
A larger version was published in Phys. Rev. B 73, 125411 (2006), 2005 We present a theoretical description of the electronic properties of graphene in the presence of disorder, electron-electron interactions, and particle-hole symmetry breaking. We show that while particle-hole asymmetry, long-range Coulomb interactions, and extended defects lead to the phenomenon of self-doping, local defects determine the transport and
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Spin polarized current and Andreev transmission in planar superconducting/ferromagnetic Nb/Ni junctions [PDF]
New Journal of Physics 9, 34 (2007), 2008 We have measured the tunnelling current in Nb/Nb$_x$O$_y$/Ni planar tunnel junctions at different temperatures. The junctions are in the intermediate transparency regime. We have extracted the current polarization of the metal/ferromagnet junction without applying a magnetic field.
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Novel mid-infrared plasmonic properties of bilayer graphene [PDF]
Phys. Rev. Lett. 112, 116801 (2014), 2013 We study the mid-infrared plasmonic response in Bernal-stacked bilayer graphene. Unlike its monolayer counterpart, bilayer graphene accommodates optically active phonon modes and a resonant interband transition at infrared frequencies. They strongly modifies the plasmonic properties of bilayer graphene, leading to Fano-type resonances, giant plasmonic ...
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Dynamics of Holes and Universality Class of the Antiferromagnetic Transition in the Two Dimensional Hubbard Model [PDF]
, 1999 The dynamics of a single hole (or electron) in the two dimensional Hubbard model is investigated. The antiferromagnetic background is described by a N\`eel state, and the hopping of the carrier is analyzed within a configuration interaction approach. Results are in agreement with other methods and with experimental data when available.
arxiv +1 more source
A shark in the stars: astronomy and culture in the Torres Strait [PDF]
arXiv, 2014 Technology has, without doubt, expanded our understanding of space. The Voyager 1 space probe is on the brink of leaving our solar system. Massive telescopes have discovered blasts of fast radio bursts from 10 billion light years away. And after a decade on Mars, a Rover recently found evidence for an early ocean on the Red Planet. But with every new
arxiv
Linear recurrence sequences and twisted binary forms [PDF]
South Pacific Journal of Pure & Applied Mathematics, vol. 2, No 3
(2015), 65-83, 2018 Let $ \prod_{i=1}^d (X-\alpha_i Y) \in{\mathbb C}[X,Y]$ be a binary form and let $\epsilon_1,\dots,\epsilon_d$ be nonzero complex numbers. We consider the family of binary forms $ \prod_{i=1}^d (X-\alpha_i \epsilon_i^aY)$, $a\in {\mathbb Z}$, which we write as $$ X^d-U_1(a)X^{d-1}Y+\cdots+(-1)^{d-1} U_{d-1}(a) XY^{d-1}+(-1)^d U_d(a) Y^d.$$ In this ...
arxiv
Long-term sustained malaria control leads to inbreeding and fragmentation of Plasmodium vivax populations [PDF]
arXiv, 2016 Plasmodium vivax populations are more resistant to malaria control strategies than Plasmodium falciparum, maintaining high genetic diversity and gene flow even at low transmission. To quantify the impact of declining transmission on P. vivax populations, we investigated population genetic structure over time during intensified control efforts and over ...
arxiv