@article{MTMT:32013091, title = {Ultrafast generation of highly crystalline graphene quantum dots from graphite paper via laser writing}, url = {https://m2.mtmt.hu/api/publication/32013091}, author = {Zhang, A. and Chen, T. and Song, S. and Yang, W. and Justin, Gooding J. and Liu, J.}, doi = {10.1016/j.jcis.2021.03.044}, journal-iso = {J COLLOID INTERF SCI}, journal = {JOURNAL OF COLLOID AND INTERFACE SCIENCE}, volume = {594}, unique-id = {32013091}, issn = {0021-9797}, year = {2021}, eissn = {1095-7103}, pages = {460-465} } @article{MTMT:30545355, title = {Reinforcing nanomedicine using graphene nanoribbons}, url = {https://m2.mtmt.hu/api/publication/30545355}, author = {Kiran, H. C. and Gangadharappa, H. V.}, doi = {10.1016/j.jddst.2018.12.004}, journal-iso = {J DRUG DELIV SCI TEC}, journal = {JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY}, volume = {49}, unique-id = {30545355}, issn = {1773-2247}, year = {2019}, eissn = {2588-8943}, pages = {334-344} } @article{MTMT:31391116, title = {Coulomb-dominated oscillations in a graphene quantum Hall Fabry-Perot interferometer}, url = {https://m2.mtmt.hu/api/publication/31391116}, author = {Zhang, Guan-Qun and Lin, Li and Peng, Hailin and Liu, Zhongfan and Kang, Ning and Xu, Hong-Qi}, doi = {10.1088/1674-1056/ab55d3}, journal-iso = {CHINESE PHYS B}, journal = {CHINESE PHYSICS B}, volume = {28}, unique-id = {31391116}, issn = {1674-1056}, abstract = {The electronic Fabry-Perot interferometer operating in the quantum Hall regime may be a promising tool for probing edge state interferences and studying the non-Abelian statistics of fractionally charged quasiparticles. Here we report on realizing a quantum Hall Fabry-Perot interferometer based on monolayer graphene. We observe resistance oscillations as a function of perpendicular magnetic field and gate voltage both on the electron and hole sides. Their Coulomb-dominated origin is revealed by the positive (negative) slope of the constant phase lines in the plane of magnetic field and gate voltage on the electron (hole) side. Our work demonstrates that the graphene interferometer is feasible and paves the way for the studies of edge state interferences since high-Landau-level and even denominator fractional quantum Hall states have been found in graphene.}, keywords = {Graphene; Quantum hall effect; electronic Fabry-Perot interferometer}, year = {2019}, eissn = {1741-4199} } @article{MTMT:3411145, title = {Coexistence of classical snake states and Aharanov-Bohm oscillations along graphene pn junctions}, url = {https://m2.mtmt.hu/api/publication/3411145}, author = {Makk, Péter and Handschin, Clevin and Tóvári, Endre and Watanabe, Kenji and Taniguchi, Takashi and Richter, Klaus and Liu, Ming-Hao and Schönenberger, Christian}, doi = {10.1103/PhysRevB.98.035413}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {98}, unique-id = {3411145}, issn = {2469-9950}, year = {2018}, eissn = {2469-9969} } @article{MTMT:27343215, title = {Edge channel confinement in a bilayer graphene n-p-n quantum dot}, url = {https://m2.mtmt.hu/api/publication/27343215}, author = {Overweg, Hiske and Rickhaus, Peter and Eich, Marius and Lee, Yongjin and Pisoni, Riccardo and Watanabe, Kenji and Taniguchi, Takashi and Ihn, Thomas and Ensslin, Klaus}, doi = {10.1088/1367-2630/aa9cd3}, journal-iso = {NEW J PHYS}, journal = {NEW JOURNAL OF PHYSICS}, volume = {20}, unique-id = {27343215}, issn = {1367-2630}, year = {2018}, eissn = {1367-2630} } @article{MTMT:26766823, title = {Electrostatically confined trilayer graphene quantum dots}, url = {https://m2.mtmt.hu/api/publication/26766823}, author = {Mirzakhani, M and Zarenia, M and Vasilopoulos, P and Peeters, F M}, doi = {10.1103/PhysRevB.95.155434}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {95}, unique-id = {26766823}, issn = {2469-9950}, year = {2017}, eissn = {2469-9969} } @article{MTMT:3311748, title = {Graphene Quantum Dots Probed by Scanning Tunneling Microscopy}, url = {https://m2.mtmt.hu/api/publication/3311748}, author = {Morgenstern, M and Freitag, N and Nent, A and Nemes Incze, Péter and Liebmann, M}, doi = {10.1002/andp.201700018}, journal-iso = {ANN PHYS-BERLIN}, journal = {ANNALEN DER PHYSIK}, volume = {529}, unique-id = {3311748}, issn = {0003-3804}, abstract = {Scanning tunneling spectroscopy results probing the electronic properties of graphene quantum dots are reviewed. After a short summary of the study of squared wave functions of graphene quantum dots on metal substrates, we firstly present data where the Landau level gaps caused by a perpendicular magnetic field are used to electrostatically confine electrons in monolayer graphene, which are probed by the Coulomb staircase revealing the consecutive charging of a quantum dot. It turns out that these quantum dots exhibit much more regular charging sequences than lithographically confined ones. Namely, the consistent grouping of charging peaks into quadruplets, both, in the electron and hole branch, portrays a regular orbital splitting of about 10meV. At low hole occupation numbers, the charging peaks are, partly, additionally grouped into doublets. The spatially varying energy separation of the doublets indicates a modulation of the valley splitting by the underlying BN substrate. We outline that this property might be used to eventually tune the valley splitting coherently. Afterwards, we describe graphene quantum dots with multiple contacts produced without lithographic resist, namely by local anodic oxidation. Such quantum dots target the goal to probe magnetotransport properties during the imaging of the corresponding wave functions by scanning tunneling spectroscopy.}, keywords = {ATOMIC-FORCE MICROSCOPE; ROOM-TEMPERATURE; scanning tunneling microscopy; MAGNETIC-FIELDS; Bilayer graphene; DIRAC FERMIONS; GRAPHENE QUANTUM DOTS; HEXAGONAL BORON-NITRIDE; MONOLAYER GRAPHENE; TUNABLE GRAPHENE; SINGLE-ELECTRON; LOCAL ANODIC-OXIDATION; local anodic oxidation; valley splitting}, year = {2017}, eissn = {1521-3889}, orcid-numbers = {Nemes Incze, Péter/0000-0002-1222-3020} } @article{MTMT:26765259, title = {Oscillating Magnetoresistance in Graphene p-n Junctions at Intermediate Magnetic Fields}, url = {https://m2.mtmt.hu/api/publication/26765259}, author = {Overweg, Hiske and Eggimann, Hannah and Liu, Ming-Hao and Varlet, Anastasia and Eich, Marius and Simonet, Pauline and Lee, Yongjin and Watanabe, Kenji and Taniguchi, Takashi and Richter, Klaus and Fal'ko, Vladimir I and Ensslin, Klaus and Ihn, Thomas}, doi = {10.1021/acs.nanolett.6b05318}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {17}, unique-id = {26765259}, issn = {1530-6984}, year = {2017}, eissn = {1530-6992}, pages = {2852-2857}, orcid-numbers = {Watanabe, Kenji/0000-0003-3701-8119} } @article{MTMT:26408895, title = {Chiral interface states in graphene p-n junctions}, url = {https://m2.mtmt.hu/api/publication/26408895}, author = {Cohnitz, L and De Martino, A and Hausler, W and Egger, R}, doi = {10.1103/PhysRevB.94.165443}, journal-iso = {PHYS REV B}, journal = {PHYSICAL REVIEW B}, volume = {94}, unique-id = {26408895}, issn = {2469-9950}, year = {2016}, eissn = {2469-9969} } @article{MTMT:3162462, title = {Electrostatically Confined Monolayer Graphene Quantum Dots with Orbital and Valley Splittings}, url = {https://m2.mtmt.hu/api/publication/3162462}, author = {Freitag, NM and Chizhova, LA and Nemes Incze, Péter and Woods, CR and Gorbachev, RV and Cao, Yixin and Geim, AK and Novoselov, KS and Burgdörfer, Joachim and Libisch, F and Morgenstern, M}, doi = {10.1021/acs.nanolett.6b02548}, journal-iso = {NANO LETT}, journal = {NANO LETTERS}, volume = {16}, unique-id = {3162462}, issn = {1530-6984}, abstract = {The electrostatic confinement of massless charge carriers is hampered by Klein tunneling. Circumventing this problem in graphene mainly relies on carving out nanostructures or applying electric displacement fields to open a band gap in bilayer graphene. So far, these approaches suffer from edge disorder or insufficiently controlled localization of electrons. Here we realize an alternative strategy in monolayer graphene, by combining a homogeneous magnetic field and electrostatic confinement. Using the tip of a scanning tunneling microscope, we induce a confining potential in the Landau gaps of bulk graphene without the need for physical edges. Gating the localized states toward the Fermi energy leads to regular charging sequences with more than 40 Coulomb peaks exhibiting typical addition energies of 7-20 meV. Orbital splittings of 4-10 meV and a valley splitting of about 3 meV for the first orbital state can be deduced. These experimental observations are quantitatively reproduced by tight binding calculations, which include the interactions of the graphene with the aligned hexagonal boron nitride substrate. The demonstrated confinement approach appears suitable to create quantum dots with well-defined wave function properties beyond the reach of traditional techniques.}, year = {2016}, eissn = {1530-6992}, pages = {5798-5805}, orcid-numbers = {Nemes Incze, Péter/0000-0002-1222-3020} }