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Rebekah Smith_Thesis_Final.pdf (2.78 MB)

ETD Abstract Container

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Scanning Tunneling Microscopy Studies of Fe Dopants on GaAs (110)

Smith, Rebekah
http://orcid.org/0000-0002-3170-2473
http://rave.ohiolink.edu/etdc/view?acc_num=osu1661115706012262

Abstract Details

2022, Doctor of Philosophy, Ohio State University, Physics.
This thesis uses scanning tunneling microscopy (STM) to study Fe dopants deposited on GaAs (110). Fe, a transition metal, can introduce magnetism into a nonmagnetic semiconductor host, GaAs, which could allow mass storage and processing of information simultaneously. An STM is a powerful tool to study individual dopants with atomic resolution. It can generate topographic images, giving structural information about the individual dopants in the semiconductor host; it can measure the electronic properties of the individual dopants, and with a spin-polarized tip, it can measure the local magnetic properties as well. The research presented here compares STM measurements taken with both a nonmagnetic and magnetic tip and shows the first magnetic contrast of individual magnetic dopants on a III-V semiconductor. We propose a preliminary model of the spin-polarized tunneling current which is affected by the tunneling rate from the sample bulk to the dopant, and the rate of tunneling from the dopant to the spin-polarized tip, as well as the exchange coupling to other spin defects.
Jay Gupta (Advisor)
Andrew Heckler (Committee Member)
Fengyuan Yang (Committee Member)
Nandini Trivedi (Committee Member)
112 p.
Condensed Matter Physics; Physics
Scanning tunneling microscopy; spin polarized scanning tunneling microscopy; STM; Fe dopants on GaAs (110) surface; scanning tunneling spectroscopy; SP-STM; GaAs; Fe; iron; dopant; GaAs (110); dilute magnetic semiconductor

Recommended Citations

Citations

  • Smith, R. (2022). Scanning Tunneling Microscopy Studies of Fe Dopants on GaAs (110) [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1661115706012262

    APA Style (7th edition)

  • Smith, Rebekah. Scanning Tunneling Microscopy Studies of Fe Dopants on GaAs (110). 2022. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1661115706012262.

    MLA Style (8th edition)

  • Smith, Rebekah. "Scanning Tunneling Microscopy Studies of Fe Dopants on GaAs (110)." Doctoral dissertation, Ohio State University, 2022. http://rave.ohiolink.edu/etdc/view?acc_num=osu1661115706012262

    Chicago Manual of Style (17th edition)

osu1661115706012262
149
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This open access ETD is published by The Ohio State University and OhioLINK.