September 2018 – Kavli Institute Pre-Print Publications

Disentangling lattice and electronic contributions to the metal-insulator transition from bulk vs. layer confined RNiO$_3$

Posted by klaurent September 30, 2018Cornell

Kavli Affiliate: Ankit Disa | Summary:In complex oxide materials, changes in electronic properties are often associated with changes in crystal structure, raising the question of the relative roles of the electronic and lattice effects in driving the metal-insulator transition. This paper presents a combined theoretical and experimental analysis of the dependence of the metal-insulator transition […]

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Disentangling lattice and electronic contributions to the metal-insulator transition from bulk vs. layer confined RNiO$_3$

Posted by September 30, 2018Cornell

Kavli Affiliate: Ankit Disa | First 5 Authors: Alexandru B. Georgescu, Oleg E. Peil, Ankit Disa, Antoine Georges, Andrew J. Millis | Summary: In complex oxide materials, changes in electronic properties are often associated with changes in crystal structure, raising the question of the relative roles of the electronic and lattice effects in driving the […]

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Diffraction limited centimeter scale radiator: metasurface grating antenna for phased array LiDAR

Posted by klaurent September 28, 2018UCSB

Kavli Affiliate: Larry Coldren | Summary:In this paper, we demonstrate a radiation-strength-chirped metasurface centimeter-long grating antenna, whose beam quality is approaching the diffraction limit in its footprint with 90 percent efficiency.Instead of chirping the duty cycle to tune radiation strength, which calls for non-scalable fabrication resolution, we design a 2D fish-bone surface grating with apodized […]

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Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data

Posted by klaurent September 24, 2018Tokyo

Kavli Affiliate: Hiroaki Aihara | Summary:We measure cosmic weak lensing shear power spectra with the Subaru Hyper Suprime-Cam (HSC) survey first-year shear catalog covering 137deg$^2$ of the sky. Thanks to the high effective galaxy number density of $sim$17 arcmin$^-2$ even after conservative cuts such as magnitude cut of $i<24.5$ and photometric redshift cut of $0.3leq […]

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On the Origin of the Two-Dimensional Electron Gas at the CdO (100) Surface

Posted by klaurent September 21, 2018Caltech

Kavli Affiliate: Nathan Lewis | Summary:Synchrotron-radiation angle-resolved and core-level photoemission spectroscopy are used together to investigate the origin of the two-dimensional electron gas on the surface of single crystal CdO (100) films. A reduction in the two-dimensional electron density of the surface state is observed under the synchrotron beam during ARPES, which is shown to […]

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Enhanced oxygen solubility in metastable water under tension

Posted by klaurent September 18, 2018Cornell

Kavli Affiliate: Warren R. Zipfel | Summary:Despite its relevance in numerous natural and industrial processes, the solubility of molecular oxygen has never been directly measured in capillary condensed liquid water. In this article, we measure oxygen solubility in liquid water trapped within nanoporous samples, in metastable equilibrium with a subsaturated vapor. We show that solubility […]

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Highly-multiplexed microwave SQUID readout using the SLAC Microresonator Radio Frequency (SMuRF) Electronics for Future CMB and Sub-millimeter Surveys

Posted by klaurent September 11, 2018Stanford

Kavli Affiliate: Ethan Karpel | Summary:The next generation of cryogenic CMB and submillimeter cameras under development require densely instrumented sensor arrays to meet their science goals. The readout of large numbers ($sim$10,000–100,000 per camera) of sub-Kelvin sensors, for instance as proposed for the CMB-S4 experiment, will require substantial improvements in cold and warm readout techniques. […]

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Classifying Signatures of Sudden Ionospheric Disturbances

Posted by klaurent September 8, 2018Stanford

Kavli Affiliate: Philip H. Scherrer | Summary:Solar activity, such as flares, produce bursts of high-energy radiation that temporarily enhance the D-region of the ionosphere and attenuate low-frequency radio waves. To track these Sudden Ionospheric Disturbances (SIDs), which disrupt communication signals and perturb satellite orbits, Scherrer et al. (2008) developed an international, ground-based network of around […]

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The LSST Dark Energy Science Collaboration (DESC) Science Requirements Document

Posted by klaurent September 5, 2018Stanford

Kavli Affiliate: Patricia Burchat | Summary:The Large Synoptic Survey Telescope (LSST) Dark Energy Science Collaboration (DESC) will use five cosmological probes: galaxy clusters, large scale structure, supernovae, strong lensing, and weak lensing. This Science Requirements Document (SRD) quantifies the expected dark energy constraining power of these probes individually and together, with conservative assumptions about analysis […]

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Searching for Materials with High Refractive Index and Wide Band Gap: A First-Principles High-Throughput Study

Posted by klaurent September 4, 2018Cornell

Kavli Affiliate: Jin Suntivich | Summary:Materials combining both a high refractive index and a wide band gap are of great interest for optoelectronic and sensor applications. However, these two properties are typically described by an inverse correlation with high refractive index appearing in small gap materials and vice-versa. Here, we conduct a first-principles high-throughput study […]

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