BROWSE

Related Researcher

Author's Photo

Lee, Zonghoon
Atomic-Scale Electron Microscopy (ASEM) Lab
Research Interests
  • Advanced Transmission Electron Microscopy (TEM/STEM), in Situ TEM, graphene, 2D materials, low-dimensional crystals, nanostructured materials

ITEM VIEW & DOWNLOAD

Unveiling the Effect of Superlattice Interfaces and Intermixing on Phase Change Memory Performance

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Unveiling the Effect of Superlattice Interfaces and Intermixing on Phase Change Memory Performance
Author
Khan, Asir IntisarWu, XiangjinPerez, ChristopherWon, ByoungjunKim, KangsikRamesh, PranavKwon, HeungdongTung, Maryann C.Lee, ZonghoonOh, Il-KwonSaraswat, KrishnaAsheghi, MehdiGoodson, Kenneth E.Wong, H. -S. PhilipPop, Eric
Issue Date
2022-07
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.22, no.15, pp.6285 - 6291
Abstract
Superlattice (SL) phase change materials have shown promise to reduce the switching current and resistance drift of phase change memory (PCM). However, the effects of internal SL interfaces and intermixing on PCM performance remain unexplored, although these are essential to understand and ensure reliable memory operation. Here, using nanometer-thin layers of Ge2Sb2Te5 and Sb2Te3 in SL-PCM, we uncover that both switching current density (J(reset)) and resistance drift coefficient (v) decrease as the SL period thickness is reduced (i.e., higher interface density); however, interface intermixing within the SL increases both. The signatures of distinct versus intermixed interfaces also show up in transmission electron microscopy, X-ray diffraction, and thermal conductivity measurements of our SL films. Combining the lessons learned, we simultaneously achieve low J(reset) & AP; 3-4 MA/ cm(2) and ultralow v & AP; 0.002 in mushroom-cell SL-PCM with similar to 110 nm bottom contact diameter, thus advancing SL-PCM for and neuromorphic applications.
URI
https://scholarworks.unist.ac.kr/handle/201301/59160
DOI
10.1021/acs.nanolett.2c01869
ISSN
1530-6984
Appears in Collections:
MSE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU