Semiconductor heterostructure studies using emerging technologies

Abstract

Low-temperature scanning tunnelling microscopy (LT-STM), surface acoustic wave (SAW), and mechanical cantilever are used to measure and manipulate quantum characteristics in semiconductor heterostructures. A nanoscale detection of local density of states is demonstrated for electrons confined in semiconductor quantum wells and dots by a combination of InAs-based heterostructures and LT-STM. The SAW is used to realize moving quantum wires and dots in semiconductor heterostructures. A synchronized optical measurement confirms two types of modulation, i.e. bandgap and potential modulations. A combination of mechanical cantilever and quantum heterostructures gives a new mechanical functionality and a novel tool to analyse quantum transport characteristics.

Direct Probing of Nanodimensioned Oxide Multilayers with the Aid of Focused Ion Beam Milling

“…On the other hand, such a cleavage method for a heterolayer system (made of dissimilar materials) does not controllably expose the heterointerfaces and does not enable the approach of the STM tip onto the real interfaces given the steep slope of the interfacial fracture surface vertical to the scanning direction. The fracture approach was successfully applied to semiconducting InAs/GaSb superlattices due to a relatively large total thickness (i.e., 2 μm) and the existence of (110) easy cleavage planes perpendicular to the initial substrate surface 22. In ref.…”

Semiconductors in the Digital Age: Evolution, Challenges, and Geopolitical Implications

“…With higher density and lower energy consumption, ReRAM has the potential to revolutionize data storage (Yu;Chen, 2016). In contrast, silicon photonics, which uses light instead of electrons to transmit information, is emerging as a promising solution to overcome the bandwidth and energy consumption challenges of conventional electronic systems (Hirayama et al, 2007).…”

“…Semiconductor heterostructures have been the focus of extensive research, aiming to drive significant advances in nanoscale detection and the study of quantum transport properties, as mentioned by Hirayama et al (2007). These semiconductor structures, composed of layers of different semiconductor materials, offer a promising field to explore phenomena on extremely small scales.…”

Semiconductores en la era digital: evolución, desafíos e implicaciones geopolíticas

“…Con una mayor densidad y menor consumo de energía, la ReRAM tiene el potencial de revolucionar el almacenamiento de datos (Yu;Chen, 2016). Por otro lado, la fotónica en silicio, que utiliza luz en lugar de electrones para transmitir información, está emergiendo como una solución prometedora para superar los desafíos de ancho de banda y consumo de energía de los sistemas electrónicos convencionales (Hirayama et al, 2007).…”