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Cryogenic NDRO in Conventional Non-Interface-Engineered HZO-Based MFM Capacitors

Mamidala, Karthik Ram LU orcid ; Andersen, André LU and Wernersson, Lars-Erik LU (2026) In IEEE Journal of the Electron Devices Society 14. p.740-745
Abstract
Cryogenic non-volatile memory technologies are crucial for realizing energy-efficient and scalable quantum computing systems. Ferroelectric capacitors (FeCAPs) are promising candidates; however, conventional readout relies on polarization switching, resulting in destructive operation. In this work, we demonstrate the cryogenic implementation of non-destructive capacitive readout (NDRO) in conventional Hf0.5Zr0.5O2-based capacitors down to 10 K. By exploiting the capacitance difference between polarization states, stable readout at Vread = 0 V is achieved without perturbing the stored state. The devices exhibit stable retention over 1000 s and low variability across devices and repeated reads at room temperature, 77 K, and 10 K. Multilevel... (More)
Cryogenic non-volatile memory technologies are crucial for realizing energy-efficient and scalable quantum computing systems. Ferroelectric capacitors (FeCAPs) are promising candidates; however, conventional readout relies on polarization switching, resulting in destructive operation. In this work, we demonstrate the cryogenic implementation of non-destructive capacitive readout (NDRO) in conventional Hf0.5Zr0.5O2-based capacitors down to 10 K. By exploiting the capacitance difference between polarization states, stable readout at Vread = 0 V is achieved without perturbing the stored state. The devices exhibit stable retention over 1000 s and low variability across devices and repeated reads at room temperature, 77 K, and 10 K. Multilevel operation is demonstrated at 10 K with multiple distinct capacitance states maintained under NDRO conditions. Endurance measurements at 10 K show clear state separation beyond 107 cycles. Analysis of the temperature-dependent behaviour indicates that imprint-induced asymmetry plays a key role in enabling reliable state discrimination at cryogenic temperatures, despite the reduction in absolute capacitance with decreasing temperature. These results demonstrate the feasibility of NDRO in standard nominally symmetric ferroelectric capacitors at cryogenic temperatures without deliberate interface engineering, highlighting their potential for cryogenic memory and in-memory computing applications. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cryogenic electronics, Ferroelectric (FE) devices, HZO, Multilevel, Memcapacitors, Non-volatile memory, Non-desctructive read out, NDRO
in
IEEE Journal of the Electron Devices Society
volume
14
pages
740 - 745
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
ISSN
2168-6734
DOI
10.1109/JEDS.2026.3723559
language
English
LU publication?
yes
additional info
Mamidala Karthik Ram and André Andersen contributed equally
id
dc23b109-bb0c-416e-9140-b019a4f9db7b
date added to LUP
2026-08-14 15:36:55
date last changed
2026-09-02 09:49:27
@article{dc23b109-bb0c-416e-9140-b019a4f9db7b,
  abstract     = {{Cryogenic non-volatile memory technologies are crucial for realizing energy-efficient and scalable quantum computing systems. Ferroelectric capacitors (FeCAPs) are promising candidates; however, conventional readout relies on polarization switching, resulting in destructive operation. In this work, we demonstrate the cryogenic implementation of non-destructive capacitive readout (NDRO) in conventional Hf0.5Zr0.5O2-based capacitors down to 10 K. By exploiting the capacitance difference between polarization states, stable readout at Vread = 0 V is achieved without perturbing the stored state. The devices exhibit stable retention over 1000 s and low variability across devices and repeated reads at room temperature, 77 K, and 10 K. Multilevel operation is demonstrated at 10 K with multiple distinct capacitance states maintained under NDRO conditions. Endurance measurements at 10 K show clear state separation beyond 107 cycles. Analysis of the temperature-dependent behaviour indicates that imprint-induced asymmetry plays a key role in enabling reliable state discrimination at cryogenic temperatures, despite the reduction in absolute capacitance with decreasing temperature. These results demonstrate the feasibility of NDRO in standard nominally symmetric ferroelectric capacitors at cryogenic temperatures without deliberate interface engineering, highlighting their potential for cryogenic memory and in-memory computing applications.}},
  author       = {{Mamidala, Karthik Ram and Andersen, André and Wernersson, Lars-Erik}},
  issn         = {{2168-6734}},
  keywords     = {{Cryogenic electronics; Ferroelectric (FE) devices; HZO; Multilevel; Memcapacitors; Non-volatile memory; Non-desctructive read out; NDRO}},
  language     = {{eng}},
  month        = {{08}},
  pages        = {{740--745}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Journal of the Electron Devices Society}},
  title        = {{Cryogenic NDRO in Conventional Non-Interface-Engineered HZO-Based MFM Capacitors}},
  url          = {{http://dx.doi.org/10.1109/JEDS.2026.3723559}},
  doi          = {{10.1109/JEDS.2026.3723559}},
  volume       = {{14}},
  year         = {{2026}},
}