Isostructural metal-insulator transition in VO2 Lee, D; Chung, B; Shi, Y ...
Science (American Association for the Advancement of Science),
11/2018, Volume:
362, Issue:
6418
Journal Article
Peer reviewed
Open access
Separating structure and electrons in VO2Above 341 kelvin—not far from room temperature—bulk vanadium dioxide (VO2) is a metal. But as soon as the material is cooled below 341 kelvin, VO2 turns into ...an insulator and, at the same time, changes its crystal structure from rutile to monoclinic. Lee et al. studied the peculiar behavior of a heterostructure consisting of a layer of VO2 placed underneath a layer of the same material that has a bit less oxygen. In the VO2 layer, the structural transition occurred at a higher temperature than the metal-insulator transition. In between those two temperatures, VO2 was a metal with a monoclinic structure—a combination that does not occur in the absence of the adjoining oxygen-poor layer.Science, this issue p. 1037The metal-insulator transition in correlated materials is usually coupled to a symmetry-lowering structural phase transition. This coupling not only complicates the understanding of the basic mechanism of this phenomenon but also limits the speed and endurance of prospective electronic devices. We demonstrate an isostructural, purely electronically driven metal-insulator transition in epitaxial heterostructures of an archetypal correlated material, vanadium dioxide. A combination of thin-film synthesis, structural and electrical characterizations, and theoretical modeling reveals that an interface interaction suppresses the electronic correlations without changing the crystal structure in this otherwise correlated insulator. This interaction stabilizes a nonequilibrium metallic phase and leads to an isostructural metal-insulator transition. This discovery will provide insights into phase transitions of correlated materials and may aid the design of device functionalities.
The metal-insulator transition in correlated materials is usually coupled to a symmetry-lowering structural phase transition. This coupling not only complicates the understanding of the basic ...mechanism of this phenomenon but also limits the speed and endurance of prospective electronic devices. We demonstrate an isostructural, purely electronically driven metal-insulator transition in epitaxial heterostructures of an archetypal correlated material, vanadium dioxide. A combination of thin-film synthesis, structural and electrical characterizations, and theoretical modeling reveals that an interface interaction suppresses the electronic correlations without changing the crystal structure in this otherwise correlated insulator. This interaction stabilizes a nonequilibrium metallic phase and leads to an isostructural metal-insulator transition. This discovery will provide insights into phase transitions of correlated materials and may aid the design of device functionalities.
Isostructural metal-insulator transition in VO 2 Lee, D.; Chung, B.; Shi, Y. ...
Science (American Association for the Advancement of Science),
11/2018, Volume:
362, Issue:
6418
Journal Article
Peer reviewed
The metal-insulator transition in correlated materials is usually coupled to a symmetry-lowering structural phase transition. This coupling not only complicates the understanding of the basic ...mechanism of this phenomenon but also limits the speed and endurance of prospective electronic devices. We demonstrate an isostructural, purely electronically driven metal-insulator transition in epitaxial heterostructures of an archetypal correlated material, vanadium dioxide. A combination of thin-film synthesis, structural and electrical characterizations, and theoretical modeling reveals that an interface interaction suppresses the electronic correlations without changing the crystal structure in this otherwise correlated insulator. This interaction stabilizes a nonequilibrium metallic phase and leads to an isostructural metal-insulator transition. This discovery will provide insights into phase transitions of correlated materials and may aid the design of device functionalities.
Building more usable APIs McLellan, S.G.; Roesler, A.W.; Tempest, J.T. ...
IEEE software,
05/1998, Volume:
15, Issue:
3
Journal Article
Peer reviewed
Traditional software usability methods can help us design more understandable and more useful application program interfaces (APIs). They also give us information we need to write good API reference ...documentation-before we invest in either programmers or writers and before evolving a large body of code or content.
Best known for his books We Have Never Been Modern , Laboratory Life , and Science in Action , Bruno Latour has inspired scholarship across many disciplines. In the past few years, the fields of ...rhetoric and composition have witnessed an explosion of interest in Latour’s work. Editors Paul Lynch and Nathaniel Rivers have assembled leading and emerging scholars in order to continue and focus the debate over what Latour means for the study of persuasion and written communication.
The chapters of this volume discern, rearticulate, and occasionally critique rhetoric and composition’s growing interest in Latour. These contributions include work on topics such as agency, argument, rhetorical history, pedagogy, and technology, among others. Contributors explain key terms; identify implications of Latour’s work for rhetoric and composition; and explore how his theories might inform writing pedagogies and be used to build research methodologies.
Thinking with Bruno Latour in Rhetoric and Composition shows how Latour’s groundbreaking theories on technology, agency, and networks might be taken up, enriched, and extended to challenge scholars in rhetorical studies (both English and Communications), composition, and writing studies to rethink some of the field’s most basic assumptions. It is set to become the standard introduction on Latour that will appeal not only to those scholars already interested in Latour, but also those approaching Latour for the first time.
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