Quantized Conductance and Large g-Factor Anisotropy in InSb Quantum Point Contacts

Mechanisms for Strong Anisotropy of In-Plane g-Factors in Hole Based Quantum Point Contacts.

In-plane hole g factors measured in quantum point contacts based on p-type heterostructures strongly depend on the orientation of the magnetic field with respect to the electric current. This effect, first reported a decade ago and confirmed in a number of publications, has remained an open problem. In this work, we present systematic experimental studies to disentangle different mechanisms con...

Microscopic origin of the 1.3 G(0) conductance observed in oxygen-doped silver quantum point contacts.

Besides the peak at one conductance quantum, G0, two additional features at ∼0.4 G0 and ∼1.3 G0 have been observed in the conductance histograms of silver quantum point contacts at room temperature in ambient conditions. In order to understand such feature, here we investigate the electronic transport and mechanical properties of clean and oxygen-doped silver atomic contacts by employing the no...

Conductance Anomalies in Transport through Quantum Dots and Quantum Point contacts

Dienstag, 23. Mai 2017 17.15 Uhr Stuttgarter Physikalisches Kolloquium Max-Planck-Institut für Festkörperforschung Max-Planck-Institut für Intelligente Systeme Fachbereich Physik, Universität Stuttgart Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, 70569 Stuttgart-Büsnau Ansprechpartner: Christian Ast E-Mail: [email protected] Telefon: 0711 689-5250 Quantum dots and quantum poi...

Conductance Quantisation in Metallic Point Contacts

Imaging in Quantum Point Contacts

Alessandro Cresti , Giuseppe Grosso (2) and Giuseppe Pastori Parravicini (3) (1) NEST-INFM, Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy, and Dipartimento di Fisica E. Fermi, Largo B. Pontecorvo 3, I-56127 Pisa, Italy [email protected] (2) NEST-INFM and Dipartimento di Fisica E. Fermi, Largo B. Pontecorvo 3, I-56127 Pisa, Italy (3) NEST-INFM and Dipartimento di Fisica ...