Catálogo de publicaciones - revistas

<jats:title>Worms yield opioid receptor insight</jats:title> <jats:p> The µ-opioid receptor (MOR) is the target of pain-reducing drugs, including morphine and the potent synthetic opioid fentanyl. Better understanding of the receptor system is needed to suppress potentially deadly side effects and manage addiction potential. Wang <jats:italic>et al.</jats:italic> used a screen in the worm <jats:italic>Caenorhabditis elegans</jats:italic> to find genes that influenced MOR function (see the Perspective by Mercer Lindsay and Scherrer). They found another receptor called GPR139, loss of which enhanced effects of morphine in mice but reduced withdrawal effects. GPR139 could be a target to improve safety or efficacy of opioid therapy. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1267" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aau2078">1267</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1246" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aay9345">1246</jats:related-article> </jats:p>

<jats:title>The topology of line nodes</jats:title> <jats:p> Band structure degeneracies in topological materials can take the form of lines or even chains of interconnected loops. Wu <jats:italic>et al.</jats:italic> study theoretically these nodal lines and how they evolve as the system parameters are varied. They focus on a class of materials that have weak spin-orbit coupling and that respect a combination of inversion- and time-reversal symmetry. Noncommutative topological charges are associated with nodal lines in such materials that place constraints on the configurations of these lines. Calculations indicate that elemental scandium under strain may provide a test system for this unconventional topology. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1273" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aau8740">1273</jats:related-article> </jats:p>

<jats:title>Magnetic Weyl semimetals</jats:title> <jats:p> Weyl semimetals (WSMs)—materials that host exotic quasiparticles called Weyl fermions—must break either spatial inversion or time-reversal symmetry. A number of WSMs that break inversion symmetry have been identified, but showing unambiguously that a material is a time-reversal-breaking WSM is tricky. Three groups now provide spectroscopic evidence for this latter state in magnetic materials (see the Perspective by da Silva Neto). Belopolski <jats:italic>et al.</jats:italic> probed the material Co <jats:sub>2</jats:sub> MnGa using angle-resolved photoemission spectroscopy, revealing exotic drumhead surface states. Using the same technique, Liu <jats:italic>et al.</jats:italic> studied the material Co <jats:sub>3</jats:sub> Sn <jats:sub>2</jats:sub> S <jats:sub>2</jats:sub> , which was complemented by the scanning tunneling spectroscopy measurements of Morali <jats:italic>et al.</jats:italic> These magnetic WSM states provide an ideal setting for exotic transport effects. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1278" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2327">1278</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1282" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2873">1282</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1286" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2334">1286</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1248" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aax6190">1248</jats:related-article> </jats:p>

<jats:title>Magnetic Weyl semimetals</jats:title> <jats:p> Weyl semimetals (WSMs)—materials that host exotic quasiparticles called Weyl fermions—must break either spatial inversion or time-reversal symmetry. A number of WSMs that break inversion symmetry have been identified, but showing unambiguously that a material is a time-reversal-breaking WSM is tricky. Three groups now provide spectroscopic evidence for this latter state in magnetic materials (see the Perspective by da Silva Neto). Belopolski <jats:italic>et al.</jats:italic> probed the material Co <jats:sub>2</jats:sub> MnGa using angle-resolved photoemission spectroscopy, revealing exotic drumhead surface states. Using the same technique, Liu <jats:italic>et al.</jats:italic> studied the material Co <jats:sub>3</jats:sub> Sn <jats:sub>2</jats:sub> S <jats:sub>2</jats:sub> , which was complemented by the scanning tunneling spectroscopy measurements of Morali <jats:italic>et al.</jats:italic> These magnetic WSM states provide an ideal setting for exotic transport effects. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1278" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2327">1278</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1282" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2873">1282</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1286" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav2334">1286</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6459" page="1248" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aax6190">1248</jats:related-article> </jats:p>