Low-temperature scanning tunneling microscopy is used to investigate and control quantum phenomena in individual nanostructures on III-V semiconductor surfaces. This technique combines the capabilities of local spectroscopy, local excitation by inelastic electron tunneling, manipulation of single atoms and molecules, and atom-by-atom assembly of artificial structures with sub-angstrom accuracy. Model systems of interest include structures with predefined size, geometry and chemical composition consisting of a small number of atoms and/or molecules and range down to single atoms, atomic surface vacancies and molecules interacting with their solid-state environment. Our goal is to explore new functions based on switching and conduction processes, quantization effects, and magnetic behavior at the atomic scale. Our latest research activities include the construction of quantum dot assemblies (quantum dot “molecules”) and quantum rings whose electronic level structure has no intrinsic variation but can nonetheless be tuned over a wide range. In addition, we study single organic molecules and STM-engineered adatom-molecule complexes on semiconductors acting as binary switches and tunable single-molecule transistors.
10 | Author | V. D. Pham , K. Kanisawa , S. Fölsch |
Title |
Quantum rings engineered by atom manipulation |
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Source | Phys. Rev. Lett. , 123 , 066801 ( 2019 ) | |
DOI : 10.1103/PhysRevLett.123.066801 | Download: PDF | Cite : Bibtex RIS |
9 | Author | Y. Pan , K. Kanisawa , N. Ishikawa , S. Fölsch |
Title |
Scanning tunnelling spectroscopy and manipulation of double-decker phthalocyanine molecules on a semiconductor surface |
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Source | J. Phys.: Condens. Matter , 29 , 364001 ( 2017 ) | |
DOI : 10.1088/1361-648X/aa7dc4 | Cite : Bibtex RIS |
8 | Author | Y. Pan , K. Kanisawa , S. Fölsch |
Title |
Creating and probing quantum dot molecules with the scanning tunneling microscope |
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Source | JVST B , 35 , 04F102 ( 2017 ) | |
DOI : 10.1116/1.4979848 | Cite : Bibtex RIS |
7 | Author | Y. Pan , J. Yang , S. C. Erwin , K. Kanisawa , S. Fölsch |
Title |
Reconfigurable quantum-dot molecules created by atom manipulation |
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Source | Phys. Rev. Lett. , 115 , 076803 ( 2015 ) | |
DOI : 10.1103/PhysRevLett.115.076803 | Download: PDF | Cite : Bibtex RIS |
6 | Author | J. Martinez-Blanco , C. Nacci , S.C. Erwin , K. Kanisawa , E. Locane , M. Thomas , F. von Oppen , P.W. Brouwer , S. Fölsch |
Title |
Gating a single-molecule transistor with individual atoms |
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Source | Nat. Phys. , 11 , 640 ( 2015 ) | |
DOI : 10.1038/nphys3385 | Cite : Bibtex RIS |
5 | Author | S. Fölsch , J. Martinez-Blanco , J. Yang , K. Kanisawa , S. C. Erwin |
Title |
Quantum dots with single-atom precision |
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Source | Nature Nanotechnol. , 9 , 505 ( 2014 ) | |
DOI : 10.1038/NNANO.2014.129 | Cite : Bibtex RIS |
4 | Author | J. Yang , C. Nacci , J. Martinez-Blanco , K. Kanisawa , S. Fölsch |
Title |
Vertical manipulation of native adatoms on the InAs(111)A surface |
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Source | J. Phys.: Condens. Matter , 24 , 354008 ( 2012 ) | |
Bibtex RIS | Cite :
3 | Author | C. Nacci , S. C. Erwin , K. Kanisawa , S. Fölsch |
Title |
Controlled switching within an organic molecule deliberately pinned to a semiconductor surface |
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Source | ACS Nano , 6 , 4190 ( 2012 ) | |
Bibtex RIS | Cite :
2 | Author | J. Yang , S. C. Erwin , K. Kanisawa , C. Nacci , S. Fölsch |
Title |
Emergent multistability in assembled nanostructures |
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Source | Nano Lett. , 11 , 2486 ( 2011 ) | |
Bibtex RIS | Cite :
1 | Author | S. Fölsch , J. Yang , C. Nacci , K. Kanisawa |
Title |
Atom-by-atom quantum state control in adatom chains on a semiconductor |
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Source | Phys. Rev. Lett. , 103 , 096104 ( 2009 ) | |
Download: PDF | Cite : Bibtex RIS |