Difference: QuantizedConductance (8 vs. 9)

Revision 92019-01-28 - JinHe

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META TOPICPARENT	name="PHY4821L"

Lab Assignment: Quantized Conductance Lab

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5. Statistical data analysis, build histogram, perform Gaussian fits to the histogram.

6. Develop understanding of quantum mechanics

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Part A: Data Collection

Observe quantum steps in the current vs distance (I-d) curve. You should be able to see at least one conductance (conductance=current/voltage) step at G0=2e^2/h≈77.5 microsiemen (uS) or R0=1/G0=12.9 kΩ, There are typically more than 1 steps, appearing at 1G0, 2G0, ...

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Stepper motor for low precision movement of gold tip (about 100 nm resolution).
Piezo driver and piezo actuator to control the high precision movement of gold tip (about 0.1 nm resolution).
Data acquisition setup, labview program to control the hardware

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Electrical and Mechanical noise reduction setup

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Electrical and Mechanical noise reduction setup. Also read this link.

Write Up

You need to explain the experiment principle and theory, quantum conductance, quantum tunneling.

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