Catálogo de publicaciones - revistas

<jats:title>Computers tease out interaction effects</jats:title> <jats:p> Although graphene is often thought of as a material in which electron-electron interactions are negligible, some of its properties cannot be explained by such a simple picture. Tang <jats:italic>et al.</jats:italic> undertook comprehensive quantum Monte Carlo numerical calculations that consider both long-range and contact interactions in systems that, like graphene, have two-dimensional (2D) Dirac electrons. Different 2D Dirac materials systems, such as topological insulators and graphene on various substrates, reside in different parts of the resulting phase diagram. </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="6402" page="570" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aao2934">570</jats:related-article> </jats:p>

<jats:title>Moving the heat aside with BAs</jats:title> <jats:p> Thermal management becomes increasingly important as we decrease device size and increase computing power. Engineering materials with high thermal conductivity, such as boron arsenide (BAs), is hard because it is essential to avoid defects and impurities during synthesis, which would stop heat flow. Three different research groups have synthesized BAs with a thermal conductivity around 1000 watts per meter-kelvin: Kang <jats:italic>et al.</jats:italic> , Li <jats:italic>et al.</jats:italic> , and Tian <jats:italic>et al.</jats:italic> succeeded in synthesizing high-purity BAs with conductivities half that of diamond but more than double that of conventional metals (see the Perspective by Dames). The advance validates the search for high-thermal-conductivity materials and provides a new material that may be more easily integrated into semiconducting devices. </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="6402" page="575" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat5522">575</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="579" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat8982">579</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="582" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat7932">582</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="549" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aau4793">549</jats:related-article> </jats:p>

<jats:title>Moving the heat aside with BAs</jats:title> <jats:p> Thermal management becomes increasingly important as we decrease device size and increase computing power. Engineering materials with high thermal conductivity, such as boron arsenide (BAs), is hard because it is essential to avoid defects and impurities during synthesis, which would stop heat flow. Three different research groups have synthesized BAs with a thermal conductivity around 1000 watts per meter-kelvin: Kang <jats:italic>et al.</jats:italic> , Li <jats:italic>et al.</jats:italic> , and Tian <jats:italic>et al.</jats:italic> succeeded in synthesizing high-purity BAs with conductivities half that of diamond but more than double that of conventional metals (see the Perspective by Dames). The advance validates the search for high-thermal-conductivity materials and provides a new material that may be more easily integrated into semiconducting devices. </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="6402" page="575" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat5522">575</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="579" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat8982">579</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="582" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat7932">582</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="549" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aau4793">549</jats:related-article> </jats:p>

<jats:title>Moving the heat aside with BAs</jats:title> <jats:p> Thermal management becomes increasingly important as we decrease device size and increase computing power. Engineering materials with high thermal conductivity, such as boron arsenide (BAs), is hard because it is essential to avoid defects and impurities during synthesis, which would stop heat flow. Three different research groups have synthesized BAs with a thermal conductivity around 1000 watts per meter-kelvin: Kang <jats:italic>et al.</jats:italic> , Li <jats:italic>et al.</jats:italic> , and Tian <jats:italic>et al.</jats:italic> succeeded in synthesizing high-purity BAs with conductivities half that of diamond but more than double that of conventional metals (see the Perspective by Dames). The advance validates the search for high-thermal-conductivity materials and provides a new material that may be more easily integrated into semiconducting devices. </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="6402" page="575" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat5522">575</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="579" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat8982">579</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="582" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat7932">582</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="549" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aau4793">549</jats:related-article> </jats:p>

<jats:title>Expanding the role of rivers</jats:title> <jats:p>The surfaces of rivers and streams are interfaces for a host of chemical exchanges with the atmosphere and biosphere. For instance, carbon dioxide outgassing from rivers is estimated to be equivalent to one-fifth of combined emissions from fossil fuel combustion and cement production. Allen and Pavelsky used satellite imagery to estimate the surface area of rivers and streams (see the Perspective by Palmer and Ruhi). The stunning map that they generated results in an upward revision, by about one-third, to the total surface area of rivers and streams on Earth.</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="6402" page="585" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aat0636">585</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6402" page="546" related-article-type="in-this-issue" vol="361" xlink:href="10.1126/science.aau3842">546</jats:related-article> </jats:p>