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24 results on '"Bleszynski Jayich, Ania C."'

2. Mesoscopic persistent currents in a strong magnetic field

Author

Ginossar, Eran, Glazman, Leonid I., Ojanen, Teemu, von Oppen, Felix, Shanks, William E., Bleszynski-Jayich, Ania C., and Harris, J. G. E.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Recent precision measurements of mesoscopic persistent currents in normal-metal rings rely on the interaction between the magnetic moment generated by the current and a large applied magnetic field. Motivated by this technique, we extend the theory of mesoscopic persistent currents to include the effect of the finite thickness of the ring and the resulting penetration of the large magnetic field. We discuss both the sample-specific typical current and the ensemble-averaged current which is dominated by the effects of electron-electron interactions. We find that the magnetic field strongly suppresses the interaction-induced persistent current and so provides direct access to the independent-electron contribution. Moreover, the technique allows for measurements of the entire distribution function of the persistent current. We also discuss the consequences of the Zeeman splitting and spin-orbit scattering, and include a detailed and quantitative comparison of our theoretical results to experimental data., Comment: 12 pages, 7 figures

Published
2010
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3. Diamond surface functionalization via visible light-driven C-H activation for nanoscale quantum sensing.

Author

Rodgers, Lila V. H., Suong T. Nguyen, Cox, James H., Zervas, Kalliope, Zhiyang Yuan, Sangtawesin, Sorawis, Stacey, Alastair, Jaye, Cherno, Weiland, Conan, Pershin, Anton, Gali, Adam, Thomsen, Lars, Meynell, Simon A., Hughes, Lillian B., Bleszynski Jayich, Ania C., Xin Gui, Cava, Robert J., Knowles, Robert R., and de Leon, Nathalie P.

Subjects
DIAMOND surfaces, NUCLEAR spin, THERMAL plasmas, PLASMA materials processing, FUNCTIONAL groups, MELT spinning
Abstract

Nitrogen-vacancy (NV) centers in diamond are a promising platform for nanoscale NMR sensing. Despite significant progress toward using NV centers to detect and localize nuclear spins down to the single spin level, NV-based spectroscopy of individual, intact, arbitrary target molecules remains elusive. Such sensing requires that target molecules are immobilized within nanometers of NV centers with long spin coherence. The inert nature of diamond typically requires harsh functionalization techniques such as thermal annealing or plasma processing, limiting the scope of functional groups that can be attached to the surface. Solution-phase chemical methods can be readily generalized to install diverse functional groups, but they have not been widely explored for single-crystal diamond surfaces. Moreover, realizing shallow NV centers with long spin coherence times requires highly ordered single-crystal surfaces, and solution-phase functionalization has not yet been shown with such demanding conditions. In this work, we report a versatile strategy to directly functionalize C--H bonds on single-crystal diamond surfaces under ambient conditions using visible light, forming C--F, C--Cl, C--S, and C--N bonds at the surface. This method is compatible with NV centers within 10 nm of the surface with spin coherence times comparable to the state of the art. As a proof-of-principle demonstration, we use shallow ensembles of NV centers to detect nuclear spins from surface-bound functional groups. Our approach to surface functionalization opens the door to deploying NV centers as a tool for chemical sensing and single-molecule spectroscopy. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Colour centre generation in diamond for quantum technologies

Author

Smith Jason M., Meynell Simon A., Bleszynski Jayich Ania C., and Meijer Jan

Subjects
diamond, color centers, materials processing, nv centers, defects, Physics, QC1-999
Abstract

Effective methods to generate colour centres in diamond and other wide band-gap materials are essential to the realisation of solid state quantum technologies based on such systems. Such methods have been the subject of intensive research effort in recent years. In this review, we bring together the various techniques used in the generation and positioning of colour centres in diamond: ion implantation, delta-doping, electron irradiation, laser writing and thermal annealing. We assess the roles and merits of each of these techniques in the formation of colour centres for different quantum technologies and consider future combinations of the techniques to meet the requirements of the most demanding applications.

Published
2019
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7. Two-dimensional spin systems in PECVD-grown diamond with tunable density and long coherence for enhanced quantum sensing and simulation

Author

Hughes, Lillian B., primary, Zhang, Zhiran, additional, Jin, Chang, additional, Meynell, Simon A., additional, Ye, Bingtian, additional, Wu, Weijie, additional, Wang, Zilin, additional, Davis, Emily J., additional, Mates, Thomas E., additional, Yao, Norman Y., additional, Mukherjee, Kunal, additional, and Bleszynski Jayich, Ania C., additional

Published
2023
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9. Imaging the Breakdown of Ohmic Transport in Graphene

Author

Jenkins, Alec, primary, Baumann, Susanne, additional, Zhou, Haoxin, additional, Meynell, Simon A., additional, Daipeng, Yang, additional, Watanabe, Kenji, additional, Taniguchi, Takashi, additional, Lucas, Andrew, additional, Young, Andrea F., additional, and Bleszynski Jayich, Ania C., additional

Published
2022
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14. Nanomechanical Sensing Using Spins in Diamond

Author

Barson, Michael S. J., primary, Peddibhotla, Phani, additional, Ovartchaiyapong, Preeti, additional, Ganesan, Kumaravelu, additional, Taylor, Richard L., additional, Gebert, Matthew, additional, Mielens, Zoe, additional, Koslowski, Berndt, additional, Simpson, David A., additional, McGuinness, Liam P., additional, McCallum, Jeffrey, additional, Prawer, Steven, additional, Onoda, Shinobu, additional, Ohshima, Takeshi, additional, Bleszynski Jayich, Ania C., additional, Jelezko, Fedor, additional, Manson, Neil B., additional, and Doherty, Marcus W., additional

Published
2017
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18. Nanoscale electrical conductivity imaging using a nitrogen-vacancy center in diamond.

Author

Ariyaratne, Amila, Bluvstein, Dolev, Myers, Bryan A., and Bleszynski Jayich, Ania C.

Subjects
ELECTRIC conductivity, NANODIAMONDS, DIAMOND crystals, THERMAL electrons, PHASE separation, DIAMONDS, ELECTRICAL conductivity measurement
Abstract

The electrical conductivity of a material can feature subtle, non-trivial, and spatially varying signatures with critical insight into the material’s underlying physics. Here we demonstrate a conductivity imaging technique based on the atom-sized nitrogen-vacancy (NV) defect in diamond that offers local, quantitative, and non-invasive conductivity imaging with nanoscale spatial resolution. We monitor the spin relaxation rate of a single NV center in a scanning probe geometry to quantitatively image the magnetic fluctuations produced by thermal electron motion in nanopatterned metallic conductors. We achieve 40-nm scale spatial resolution of the conductivity and realize a 25-fold increase in imaging speed by implementing spin-to-charge conversion readout of a shallow NV center. NV-based conductivity imaging can probe condensed-matter systems in a new regime not accessible to existing technologies, and as a model example, we project readily achievable imaging of nanoscale phase separation in complex oxides. [ABSTRACT FROM AUTHOR]

Published
2018
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19. Nanoscale Probe of Magnetism Based on Artificial Atoms in Diamond

Author

CALIFORNIA UNIV SANTA BARBARA, Bleszynski-Jayich, Ania C, CALIFORNIA UNIV SANTA BARBARA, and Bleszynski-Jayich, Ania C

Abstract

This final report details our lab's accomplishments on nanoscale magnetic sensing using a nitrogen-vacancy (NV) center in diamond. Significant accomplishments funded by this award include 1) characterization of the surface induced decoherence with shallow, depth calibrated NV spins exhibiting long coherence times (accepted to PRL). 2) Construction of a combined atomic force microscope (AFM) and confocal microscope with 1 nm position stability. 3) The formation of high-quality factor single-crystal diamond mechanical resonators with integrated nanowire tips. 4) The formation of high-quality NV centers via chemical vapor deposition diamond growth with nitrogen delta-doping and the development of techniques such as patterned transmission electron microscope irradiation and patterned 12C implantation to form localized NV centers with long coherence times. 5)Scanned probe detection of a nanoscale volume of Gd3+ ions attached to a scanning tip using relaxation imaging. 6) Detection of a nanoscale volume of nuclear spins using a single spin in bulk diamond., The original document contains color images. AFOSR-BAA-2010-3

Published
2014

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