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


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{
  "id": "836", 
  "updated": "2021-04-28T22:16:20.162807+00:00", 
  "metadata": {
    "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 \u00b0C. 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.", 
    "contributors": [
      {
        "email": "zhaojin@mail.sim.ac.cn", 
        "givennames": "Jin", 
        "affiliations": [
          "State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China", 
          "School of Physical Science and Technology, Shanghai Tech University, Shanghai 201210, China", 
          "University of Chinese Academy of Sciences, Beijing, 100049, China"
        ], 
        "familyname": "Zhao"
      }, 
      {
        "email": "songwx@mail.sim.ac.cn", 
        "givennames": "Wen-Xiong", 
        "affiliations": [
          "State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China"
        ], 
        "familyname": "Song"
      }, 
      {
        "affiliations": [
          "State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China"
        ], 
        "givennames": "Tianjiao", 
        "familyname": "Xin"
      }, 
      {
        "email": "ztsong@mail.sim.ac.cn", 
        "givennames": "Zhitang", 
        "affiliations": [
          "State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China"
        ], 
        "familyname": "Song"
      }
    ], 
    "title": "Designing crystallization to tune the performance of phase-change memory: rules of hierarchical melt and coordinate bond", 
    "license_addendum": null, 
    "mcid": "2021.67", 
    "id": "836", 
    "is_last": true, 
    "_oai": {
      "id": "oai:materialscloud.org:836"
    }, 
    "publication_date": "Apr 29, 2021, 00:16:20", 
    "edited_by": 100, 
    "status": "published", 
    "version": 1, 
    "license": "Creative Commons Attribution 4.0 International", 
    "_files": [
      {
        "key": "Fig.2, Fig.3a-d.zip", 
        "size": 1378920, 
        "description": "There are two Figure 2 and Figure 3a-d subfolders; in the Figure 2 subfolder, there are six subfolders that contains the raw data of Fig. 2a-f, respectively; in the Figure 3a-d subfolder, there are the raw data of Fig. 3a-d, which can open using the corresponding TEM software.", 
        "checksum": "md5:a07eaf29892b1a429e277ff37aa47b4f"
      }
    ], 
    "owner": 386, 
    "keywords": [
      "Er-Sb-Te", 
      "Coordinate bond", 
      "Hierarchical melt", 
      "Phase change memory", 
      "Experimental"
    ], 
    "references": [
      {
        "type": "Preprint", 
        "doi": "https://doi.org/10.21203/rs.3.rs-118565/v1", 
        "citation": "J. Zhao, W.-X. Song, T. Xin, Z. Song, Research Square (preprint)", 
        "url": "https://www.researchsquare.com/article/rs-118565/v1"
      }
    ], 
    "conceptrecid": "835", 
    "doi": "10.24435/materialscloud:cs-2a"
  }, 
  "revision": 4, 
  "created": "2021-04-28T00:50:44.750389+00:00"
}