2023 BFY4 Abstract Detail Page
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| Abstract Title: |
W24: Investigating Electronic Structure with a Single-axis Tunneling Microscope |
| Abstract: |
We have developed a simplified alternative to the scanning tunneling microscope (STM) that restricts tip motion to one dimension: the z-axis tunneling microscope (ZTM). Here, the z-axis lies along the tip-sample separation. Students are able to observe the exponential dependence on tunneling current with tip-sample gap and observe qualitative differences in the electronic density of states between metals, semimetals, and semiconductors. The current pre-amp, stepper motor control, piezo actuator, and bias voltage are integrated into a single PC board. All signals are either analog <10 V or TTL, allowing either manual or programmatic control. The ZTM is simpler and less costly to build than an STM, expanding access to a subset of STM experiments to more learners. |
| Abstract Type: |
Workshop
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Author/Organizer Information |
| Primary Contact: |
Joshua Veazey
Grand Valley State University
Allendale, MI 49401
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Co-Author(s)
and Co-Presenter(s) |
Randy Lindgren (Physics Dept, Grand Valley State University),
Wesley Kozan (Physics Dept, Grand Valley State University),
Tikran Kocharian (School of Engineering, Grand Valley State University),
Karl Brakora (School of Engineering, Grand Valley State University),
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