skip to main content

Attention:

The NSF Public Access Repository (NSF-PAR) system and access will be unavailable from 11:00 PM ET on Friday, September 13 until 2:00 AM ET on Saturday, September 14 due to maintenance. We apologize for the inconvenience.


Search for: All records

Creators/Authors contains: "Crespi, Vincent"

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. Free, publicly-accessible full text available October 1, 2025
  2. For isotropic swimming particles driven by self-diffusiophoresis at zero Reynolds number (where particle velocity responds instantaneously to applied force), the diffusive timescale of emitted solute can produce an emergent quasi-inertial behavior. These particles can orbit in a central potential and reorient under second-order dynamics, not the first-order dynamics of classical zero-Reynolds motion. They are described by a simple effective model that embeds their history-dependent behavior as an effective inertia, this being the most primitive expression of memory. The system can be parameterized with dynamic quantities such as particle size and swimming speed, without detailed knowledge of the diffusiophoretic mechanism.

    <supplementary-material><permissions><copyright-statement>Published by the American Physical Society</copyright-statement><copyright-year>2024</copyright-year></permissions></supplementary-material></sec> </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> Free, publicly-accessible full text available May 1, 2025</span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10531717-large-area-intercalated-two-dimensional-pb-graphene-heterostructure-platform-generating-spinorbit-torque" itemprop="url"> <span class='span-link' itemprop="name">Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin–Orbit Torque</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1021/acsnano.4c04075" target="_blank" title="Link to document DOI">https://doi.org/10.1021/acsnano.4c04075  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Vera, Alexander</span> <span class="sep">; </span><span class="author" itemprop="author">Zheng, Boyang</span> <span class="sep">; </span><span class="author" itemprop="author">Yanez, Wilson</span> <span class="sep">; </span><span class="author" itemprop="author">Yang, Kaijie</span> <span class="sep">; </span><span class="author" itemprop="author">Kim, Seong Yeoul</span> <span class="sep">; </span><span class="author" itemprop="author">Wang, Xinglu</span> <span class="sep">; </span><span class="author" itemprop="author">Kotsakidis, Jimmy C</span> <span class="sep">; </span><span class="author" itemprop="author">El-Sherif, Hesham</span> <span class="sep">; </span><span class="author" itemprop="author">Krishnan, Gopi</span> <span class="sep">; </span><span class="author" itemprop="author">Koch, Roland J</span> <span class="sep">; </span><span class="author">et al</span></span> <span class="year">( <time itemprop="datePublished" datetime="2024-08-05">August 2024</time> , ACS Nano) </span> </div> <div style="cursor: pointer;-webkit-line-clamp: 5;" class="abstract" itemprop="description"> A scalable platform to synthesize ultrathin heavy metals may enable high efficiency charge-to-spin conversion for next-generation spintronics. Here we report the synthesis of air-stable, epitaxially registered monolayer Pb underneath graphene on SiC (0001) by confinement heteroepitaxy (CHet). Diffraction, spectroscopy, and microscopy reveal CHet-based Pb intercalation predominantly exhibits a mottled hexagonal superstructure due to an ordered network of Frenkel-Kontorova-like domain walls. The system’s air stability enables ex-situ spin torque ferromagnetic resonance (ST-FMR) measurements that demonstrate charge-to-spin conversion in graphene/Pb/ferromagnet heterostructures with a 1.5× increase in the effective field ratio compared to control samples. </div> <a href='#' class='show open-abstract' style='margin-left:10px;'>more »</a> <a href='#' class='hide close-abstract' style='margin-left:10px;'>« less</a> <div class="actions" style="padding-left:10px;"> <span class="reader-count"> Free, publicly-accessible full text available August 5, 2025</span> </div> </div><div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemscope itemtype="http://schema.org/TechArticle"> <div class="item-info"> <div class="title"> <a href="https://par.nsf.gov/biblio/10408936-classical-triangular-lattice-antiferromagnetic-ising-model-free-fermion-superconductor-system" itemprop="url"> <span class='span-link' itemprop="name">Classical triangular lattice antiferromagnetic Ising model as a free-fermion/superconductor system</span> </a> </div> <div> <strong> <a class="misc external-link" href="https://doi.org/10.1088/1751-8121/acc993" target="_blank" title="Link to document DOI">https://doi.org/10.1088/1751-8121/acc993  <span class="fas fa-external-link-alt"></span></a> </strong> </div> <div class="metadata"> <span class="authors"> <span class="author" itemprop="author">Nourhani, Amir</span> <span class="sep">; </span><span class="author" itemprop="author">Crespi, Vincent H.</span> <span class="sep">; </span><span class="author" itemprop="author">Lammert, Paul E.</span> </span> <span class="year">( <time itemprop="datePublished" datetime="2023-04-25">April 2023</time> , Journal of Physics A: Mathematical and Theoretical) </span> </div> <div style="cursor: pointer;-webkit-line-clamp: 5;" class="abstract" itemprop="description"> <title>Abstract

    We present a treatment of the triangular lattice antiferromagnetic Ising model (TAFIM) based on a small number of elementary ideas common to statistical and solid-state physics. The TAFIM is represented as a reduced BCS model in one space, one (imaginary) time dimension. The representation is approximate for nonzero temperature, but allows quick derivation of asymptotically exact thermodynamic functions, and the divergence of the spin–spin correlation length. The fermionic representation is exact at zero temperature. We demonstrate the existence of a two-dimensional continuum of zero-temperature equilibrium macrostates characterized by satisfied bond fractions of the three different orientations, and calculate their entropy densities.

     
    more » « less
  3. Free, publicly-accessible full text available November 1, 2024