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2020 2
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Superconductivity in a quintuple-layer square-planar nickelate.
Pan GA, Ferenc Segedin D, LaBollita H, Song Q, Nica EM, Goodge BH, Pierce AT, Doyle S, Novakov S, Córdova Carrizales D, N'Diaye AT, Shafer P, Paik H, Heron JT, Mason JA, Yacoby A, Kourkoutis LF, Erten O, Brooks CM, Botana AS, Mundy JA. Pan GA, et al. Nat Mater. 2022 Feb;21(2):160-164. doi: 10.1038/s41563-021-01142-9. Epub 2021 Nov 22. Nat Mater. 2022. PMID: 34811494
Here we report the synthesis of the quintuple-layer (n = 5) member of this series, Nd(6)Ni(5)O(12), in which optimal cuprate-like electron filling (d(8.8)) is achieved without chemical doping. We observe a superconducting transition beginning at ~13 K. Electronic structure …
Here we report the synthesis of the quintuple-layer (n = 5) member of this series, Nd(6)Ni(5)O(12), in which optimal cuprate-like electron f …
Nickelate Superconductivity without Rare-Earth Magnetism: (La,Sr)NiO2.
Osada M, Wang BY, Goodge BH, Harvey SP, Lee K, Li D, Kourkoutis LF, Hwang HY. Osada M, et al. Adv Mater. 2021 Nov;33(45):e2104083. doi: 10.1002/adma.202104083. Epub 2021 Sep 18. Adv Mater. 2021. PMID: 34536042
In this study, it is found that with significant materials optimization, substantial portions of the La(1-) (x) Sr(x) NiO(2) phase diagram can enter the regime of coherent low-temperature transport (x = 0.14 - 0.20), with subsequent superconducting transitions and a maximum onset …
In this study, it is found that with significant materials optimization, substantial portions of the La(1-) (x) Sr(x) NiO(2) phase diagram c …
Atomic-Resolution Cryo-STEM Across Continuously Variable Temperatures.
Goodge BH, Bianco E, Schnitzer N, Zandbergen HW, Kourkoutis LF. Goodge BH, et al. Microsc Microanal. 2020 Jun;26(3):439-446. doi: 10.1017/S1431927620001427. Microsc Microanal. 2020. PMID: 32501193
We measure consistently low drift rates of 0.3-0.4 A/s and demonstrate atomic-resolution cryo-STEM imaging across a continuously variable temperature range from ~100 K to well above room temperature. We conduct additional drift stability measurements across several commerc …
We measure consistently low drift rates of 0.3-0.4 A/s and demonstrate atomic-resolution cryo-STEM imaging across a continuously variable te …
COFT-AD: COntrastive Fine-Tuning for Few-Shot Anomaly Detection.
Liao J, Xu X, Nguyen MC, Goodge A, Foo CS. Liao J, et al. IEEE Trans Image Process. 2024;33:2090-2103. doi: 10.1109/TIP.2024.3374048. Epub 2024 Mar 18. IEEE Trans Image Process. 2024. PMID: 38470590
However, large anomaly-free datasets may not always be available before the inference stage; in which case an anomaly detection model must be trained with only a handful of normal samples, a.k.a. few-shot anomaly detection (FSAD). In this paper, we propose a novel methodol …
However, large anomaly-free datasets may not always be available before the inference stage; in which case an anomaly detection model must b …
A Superconducting Praseodymium Nickelate with Infinite Layer Structure.
Osada M, Wang BY, Goodge BH, Lee K, Yoon H, Sakuma K, Li D, Miura M, Kourkoutis LF, Hwang HY. Osada M, et al. Nano Lett. 2020 Aug 12;20(8):5735-5740. doi: 10.1021/acs.nanolett.0c01392. Epub 2020 Jul 1. Nano Lett. 2020. PMID: 32574061
Upon doping in Pr(0.8)Sr(0.2)NiO(2), we observe superconductivity with a transition temperature of 7-12 K and robust critical current density at 2 K of 334 kA/cm(2). These findings indicate that superconductivity in the infinite layer nickelates is relatively insens …
Upon doping in Pr(0.8)Sr(0.2)NiO(2), we observe superconductivity with a transition temperature of 7-12 K and robust critical current …