Memory device

A memory device, comprising:

• a first electrically conductive portion;
• a second electrically conductive portion, a direction from the first electrically conductive portion toward the second electrically conductive portion being aligned with a first direction;
• a first variable resistance portion provided between the first electrically conductive portion and the second electrically conductive portion;
• a first region, a second direction from the first variable resistance portion toward the first region crossing the first direction;
• and
• an insulating portion,
• the insulating portion including a first insulating region provided between the first variable resistance portion and the first region in the second direction,
• the first region including a first graphene,
• the second direction crossing a layer plane of the first graphene.

A memory device, comprising:

• a first electrically conductive portion;
• a second electrically conductive portion, a direction from the first electrically conductive portion toward the second electrically conductive portion being aligned with a first direction;
• a first variable resistance portion provided between the first electrically conductive portion and the second electrically conductive portion;
• and
• a first region, a second direction from the first variable resistance portion toward the first region crossing the first direction,
• the first region including
• a first layer portion, and
• a second layer portion provided between the first layer portion and the first variable resistance portion in the second direction,
• a first distance along the second direction between the first layer portion and the second layer portion being longer than at least one of a second distance or a third distance,
• the second distance being a distance between one of a plurality of first atoms included in the first layer portion and an other one of the plurality of first atoms adjacent to the one of the plurality of first atoms,
• the third distance being a distance between one of a plurality of second atoms included in the second layer portion and an other one of the plurality of second atoms adjacent to the one of the plurality of second atoms.