Low-Noise Diamond-Based D.C. Nano-SQUIDs

Low-Noise Diamond-Based D.C. Nano-SQUIDs
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低噪声金刚石基直流纳米 SQUID

DOI:
10.1021/acsaelm.2c00048
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发表时间:
2022
影响因子:
4.7
通讯作者:
Bose M
Bose M
中科院分区:
材料科学3区
文献类型:
--
作者:
Bose M

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纳米级超导量子干涉器件(纳米SQUID)与Dayem桥结和物理环尺寸为50 nm的已被设计在硼掺杂的纳米金刚石薄膜,使用精密的氖离子束铣削。在未分流的器件中,在磁场超过0.1T时,可以保持无滞环工作,具有高的磁通-电压传递函数,给出低磁通噪声1 kHz,同时自旋灵敏度为。在升高的磁场下,高达2 T,纳米SQUID输出电压的通量调制被维持,但周期增加,这归因于通过穿透纳米SQUID电极的每周期高达16个涡旋在纳米SQUID回路上感应的附加相位偏置。
Nanoscale superconducting quantum interference devices (nano-SQUIDs) with Dayem bridge junctions and a physical loop size of 50 nm have been engineered in boron-doped nanocrystalline diamond films using precision Ne-ion beam milling. In an unshunted device, the nonhysteretic operation can be maintained in an applied field exceeding 0.1 T with a high flux-to-voltage transfer function, giving a low flux noiseat 1 kHz and a concurrent spin sensitivity of. At elevated magnetic fields, up to 2 T, flux modulation of the nano-SQUID output voltage is maintained but with an increase in period, attributed to an additional phase bias induced on the nano-SQUID loop by up to 16 vortices per period penetrating the nano-SQUID electrodes.
开发用于检测单原子自旋翻转的微型 DC SQUID 装置
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影响因子: 5.6
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