Designing crystallization to tune the performance of phase-change memory: rules of hierarchical melt and coordinate bond


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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Zhao, Jin</dc:creator>
  <dc:creator>Song, Wen-Xiong</dc:creator>
  <dc:creator>Xin, Tianjiao</dc:creator>
  <dc:creator>Song, Zhitang</dc:creator>
  <dc:date>2021-04-29</dc:date>
  <dc:description>While alloy design has practically shown an efficient strategy to mediate two seemingly conflicted performances of writing speed and data retention in phase-change memory, the detailed kinetic pathway of alloy-tuned crystallization is still unclear. Here, we propose hierarchical melt and coordinate bond strategies to solve them, where the former stabilizes a medium-range crystal-like region and the latter provides a rule to stabilize amorphous. The Er0.52Sb2Te3 compound we designed achieves writing speed of 3.2 ns and ten-year data retention of 161 °C. We provide a direct atomic-level evidence that two neighbor Er atoms stabilize a medium-range crystal-like region, acting as a precursor to accelerate crystallization; meanwhile, the essential reason of stabilization originates from the formation of coordinate bonds by sharing lone-pair electrons of chalcogenide atoms with the empty 5d orbitals of Er atoms. The two rules pave the way for the development of storage-class memory with excellent comprehensive performance to achieve next revolutionary technology node.</dc:description>
  <dc:identifier>https://archive.materialscloud.org/record/2021.67</dc:identifier>
  <dc:identifier>doi:10.24435/materialscloud:cs-2a</dc:identifier>
  <dc:identifier>mcid:2021.67</dc:identifier>
  <dc:identifier>oai:materialscloud.org:836</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Materials Cloud</dc:publisher>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights>
  <dc:subject>Er-Sb-Te</dc:subject>
  <dc:subject>Coordinate bond</dc:subject>
  <dc:subject>Hierarchical melt</dc:subject>
  <dc:subject>Phase change memory</dc:subject>
  <dc:subject>Experimental</dc:subject>
  <dc:title>Designing crystallization to tune the performance of phase-change memory: rules of hierarchical melt and coordinate bond</dc:title>
  <dc:type>Dataset</dc:type>
</oai_dc:dc>