| http://www.w3.org/ns/prov#value | - ferred to as CCDNR, readily takes place, but the memory effect of low resistance state, hereinafter referred to as current induced memory effect, does not easily occur and the threshold voltage of CCDNR decreases with light irradiation, and the other, called B-material in this specification is a material such as an amorphous chalcogenide system which allows writing of memory or
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