Invention Grant
- Patent Title: Generation device and detection device of monopole current, and memory element using a monopole current
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Application No.: US16240306Application Date: 2019-01-04
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Publication No.: US10714677B2Publication Date: 2020-07-14
- Inventor: Shigeki Onoda , Sho Nakosai
- Applicant: RIKEN
- Applicant Address: JP Wako-Shi, Saitama
- Assignee: RIKEN
- Current Assignee: RIKEN
- Current Assignee Address: JP Wako-Shi, Saitama
- Agency: Seed IP Law Group LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@19f89485
- Main IPC: H01L43/02
- IPC: H01L43/02 ; G01R19/00 ; H01L39/02 ; H01L43/10 ; G01R15/20

Abstract:
In order to provide a memory element configured to generate and detect monopole current, in an embodiment provided in the present disclosure is a monopole current generation detection device comprising a ferromagnetic quantum spin-ice layer, a buffer layer made of a material capable of exhibiting a quantum spin-liquid state, and a pair of electrodes disposed in contact with the buffer layer. In this device it is possible to apply a voltage between the pair of electrodes by providing a voltage application means. It is possible to generate a monopole current Jm upon application of the voltage, where the monopole currents through the ferromagnetic quantum spin-ice layer and through another ferromagnetic quantum spin-ice layer that is in contact with the buffer layer on the other side of the ferromagnetic quantum spin-ice layer. Also, the monopole current can be electrically detected by providing a detection circuit to the device. In embodiments of the present disclosure, further provided is a memory element in which a buffer layer is sandwiched by two ferromagnetic quantum spin-ice layers.
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