paper presentation on spintronics ( application of nanotechnology )

PAPER PRESENTATIONPAPER PRESENTATION

ONON

SPINTRONICSSPINTRONICS((APPLICATION OF NANOTECHNOLOGYAPPLICATION OF NANOTECHNOLOGY))

SPINTRONICSSPINTRONICS

It deals with spin dependent properties of an electron instead of its charge dependent properties.

Spintronics could be more revolutionary than any other nanotechnology.

SPIN OF ELECTRONS

Spin of eSpin of e- - in vectorin vector

Sphere spinning “west to east”.

Vector points “north” or “up”.

“Down” for the opposite spin.

In magnetic field e- “spin up &down” have different energies.

Intuitive notion of spin eIntuitive notion of spin e--

Spins are moved in one direction .

Electron energy is dependent on how its spin vector direction.

Bottom line is that spin with mass & charge.

GIANT MAGNETO RESISTANCE(GMR)GIANT MAGNETO RESISTANCE(GMR)

MRAMMRAM

MRAM CHIPMRAM CHIP

QUBIT PROPERTYQUBIT PROPERTY

Qubit exist as a 0,1,or both. a) 1 for spin “up”. b) 0 for spin “down”.

A typical disruption effectively changes 0&1 randomly into 0 or 1 called decoherance.

SPINTRONICS QUBITSPINTRONICS QUBIT

8 qubits can represent every no. from 0 to 255 simultaneously.

Electron spins are natural qubits.

Qubits are extremely delicate.

Electronic Devices Spintronic devices

1. Based on properties of charge of the electron

1. Based on intrinsic property spin of electron

2. Classical property 2. Quantum property

3. Controlled by an external electric field in modern electronics

3. Controlled by external magnetic field

4. Materials: conductors and semiconductors

4.Materials: ferromagnetic materials

5. Based on the number of charges and their energy

5. Two basic spin states; spin-up and spin-down

6. Speed is limited and power dissipation is high

6. Based on direction of spin and spin coupling, high speed

conclusionconclusion

Here we exploit the spin of the electron & creating new devices & circuits ,which are more beneficial