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Lund University Lund University Publications2000-01-01T00:00+00:001dailyTunable effective g factor in InAs nanowire quantum dots
https://lup.lub.lu.se/search/publication/42a62af3-7329-49cf-bb96-a4ac2255f0a4
Björk, MikaelFuhrer, AndreasHansen, AdamLarsson, MarcusFröberg, LinusSamuelson, Lars2005We report tunneling spectroscopy measurements of the Zeeman spin splitting in InAs few-electron quantum dots. The dots are formed between two InP barriers in InAs nanowires with a wurtzite crystal structure grown using chemical beam epitaxy. The values of the electron g factors of the first few electrons entering the dot are found to strongly depend on dot size. They range from close to the InAs bulk value in large dots vertical bar g(*)vertical bar=13 down to vertical bar g(*)vertical bar=2.3 for the smallest dots.http://lup.lub.lu.se/record/211399http://dx.doi.org/10.1103/PhysRevB.72.201307wos:000233603900011scopus:29744439411engPhysical Review B (Condensed Matter and Materials Physics); 72(20), no 201307 (2005)ISSN: 1098-0121Den kondenserade materiens fysikTunable effective g factor in InAs nanowire quantum dotscontributiontojournal/articleinfo:eu-repo/semantics/articletextParity independence of the zero-bias conductance peak in a nanowire based topological superconductor-quantum dot hybrid device.
https://lup.lub.lu.se/search/publication/fbfbbb5a-b683-408d-922e-31dfc4bd10ab
Deng, MingtangYu, ChunlinHuang, GuangyaoLarsson, MarcusCaroff, PhilippeXu, Hongqi2014We explore the signatures of Majorana fermions in a nanowire based topological superconductor-quantum dot-topological superconductor hybrid device by charge transport measurements. At zero magnetic field, well-defined Coulomb diamonds and the Kondo effect are observed. Under the application of a finite, sufficiently strong magnetic field, a zero-bias conductance peak structure is observed. It is found that the zero-bias conductance peak is present in many consecutive Coulomb diamonds, irrespective of the even-odd parity of the quasi-particle occupation number in the quantum dot. In addition, we find that the zero-bias conductance peak is in most cases accompanied by two differential conductance peaks, forming a triple-peak structure, and the separation between the two side peaks in bias voltage shows oscillations closely correlated to the background Coulomb conductance oscillations of the device. The observed zero-bias conductance peak and the associated triple-peak structure are in line with Majorana fermion physics in such a hybrid topological system.http://lup.lub.lu.se/record/4913706http://dx.doi.org/10.1038/srep07261pmid:25434375wos:000346257700009scopus:84916214534engScientific Reports; 4, no 7261 (2014)ISSN: 2045-2322Den kondenserade materiens fysikParity independence of the zero-bias conductance peak in a nanowire based topological superconductor-quantum dot hybrid device.contributiontojournal/articleinfo:eu-repo/semantics/articletext