dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Swart, I. | |
dc.contributor.advisor | Gardenier, T. S. | |
dc.contributor.author | Riggelen, M. van | |
dc.date.accessioned | 2020-04-22T18:00:09Z | |
dc.date.available | 2020-04-22T18:00:09Z | |
dc.date.issued | 2020 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/35691 | |
dc.description.abstract | Artificial lattices are of great interest for simulation of complex quantum systems. Rearranging CO
molecules on Cu(111) has shown to be a very reliable method to construct them but energy broadening in
the measurements posed a problem. We expect to solve this by using a different electronic platform: we
are using the scanning tunneling microscope to manipulate In adatoms on an InAs(111)A-(2 x 2) surface.
Samples grown using the Liquid Encapsulated Czochralski (LEC) technique with a top layer grown by
molecular-beam epitaxy (MBE) were shown to exhibit less defects and are therefore more suitable for this
experiment than LEC-grown samples without an MBE-grown layer. To increase the amount of adatoms
for manipulation, In was deposited from a crucible onto the sample by heating the crucible via electron
bombardment. The kinetic energy of the electrons plays an important role: 1 keV kinetic energy resulted
in single In atoms on the surface, while 2 keV kinetic energy resulted in small clusters of In atoms. Vertical
manipulation of In adatoms was performed while I (z ) traces were recorded. Individual In adatoms were
picked up from and deposited onto the substrate with atomic precision. Challenges lie in finding out
when and why holes in the surface are made when picking up an atom and how to prevent depositing
clusters of In atoms. We constructed an In10 and an In6 chain using vertical manipulation. The lowest
energy state of the In6 chain is reported to be located at -0.131 V. We did not detect a clear signal of this
particle-in-a-box like state. To do this, the vertical manipulation method should be further optimized
and more artificial lattices should be assembled. Quantum simulators constructed in this manner promise
to be of great value in the field of quantum computing. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 10079418 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Exploring In on InAs(111)A as a platform for quantum simulation | |
dc.type.content | Bachelor Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | Artificial lattice, quantum simulation, atom manipulation | |
dc.subject.courseuu | Natuur- en Sterrenkunde | |