Project

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Materials World Network: Control of the Electron Nuclear Interaction in NanoElectronic Devices

Applicant Loss Daniel
Number 129582
Funding scheme Project funding (Div. I-III)
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Condensed Matter Physics
Start/End 01.07.2010 - 30.06.2014
Approved amount 636'082.00
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All Disciplines (2)

Discipline
Condensed Matter Physics
Theoretical Physics

Keywords (5)

Nuclear spins; interaction effects; low-dimensional; electron systems; nuclear spins, electron and hole gas

Lay Summary (English)

Lead
The main goal of the project is to understand, control, and utilize the hyperfine interaction of electron spins, confined in low-dimensional condensed matter systems, with the nuclear spins of the host lattice. This research addresses fundamental questions of many body effectsin interacting systems and is of relevance for the physics of quantum computing.
Lay summary
The main goal of the project is to understand, control, and utilize the hyperfine interaction of electron spins, confined in low-dimensional condensed matter systems, with the nuclear spins of the host lattice. This research addresses fundamental questions of many body effects
in interacting systems and is of relevance for the physics of quantum computing.
Direct link to Lay Summary Last update: 22.11.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Helical nuclear spin order in two-subband quantum wires
Meng Tobias, Loss Daniel (2013), Helical nuclear spin order in two-subband quantum wires, in PHYSICAL REVIEW B, 87(23), 235427.
Electric-Field Induced Majorana Fermions in Armchair Carbon Nanotubes
Jelena Klinovaja, Suhas Gangadharaiah, Daniel Loss (2012), Electric-Field Induced Majorana Fermions in Armchair Carbon Nanotubes, in Phys. Rev. Lett. 108, 196804 (2012), 196804.
Ferromagnetic order of nuclear spins coupled to conduction electrons: A combined effect of electron-electron and spin-orbit interactions
Zak RA, Maslov DL, Loss D (2012), Ferromagnetic order of nuclear spins coupled to conduction electrons: A combined effect of electron-electron and spin-orbit interactions, in PHYSICAL REVIEW B, 85(11), 1-19.
Fingerprints of the Anisotropic Spin-Split Hole Dispersion in Resonant Inelastic Light Scattering in Two-Dimensional Hole Systems
Hirmer M, Hirmer M, Schuh D, Wegscheider W, Korn T, Winkler R, Schuller C (2011), Fingerprints of the Anisotropic Spin-Split Hole Dispersion in Resonant Inelastic Light Scattering in Two-Dimensional Hole Systems, in PHYSICAL REVIEW LETTERS, 107(21), 1-10.
Majorana edge states in interacting one-dimensional systems
Suhas Gangadharaiah et al., Bernd Braunecker, Pascal Simon, Daniel Loss (2011), Majorana edge states in interacting one-dimensional systems, in Phys. Rev. Lett. 107, 036801 (2011), 107, 036801.
Spin susceptibility of interacting two-dimensional electrons in the presence of spin-orbit coupling
Zak Robert Andrzej, Maslov Dmitrii L., Loss Daniel (2010), Spin susceptibility of interacting two-dimensional electrons in the presence of spin-orbit coupling, in PHYSICAL REVIEW B, 82(11), 115415.

Awards

Title Year
Blaise Pascal Medal for Physics 2014

Associated projects

Number Title Start Funding scheme
144422 Molecular Beam Epitaxy of highest-purity III/V semiconductor heterostructures 01.10.2012 Project funding (Div. I-III)

Abstract

This proposal request supports for an international collaboration for research and education among Harvard University and University of Florida (UF) in the USA, University of Basel and ETH (Zurich) in Switzerland. The main goal of the project is to understand, control, and utilize the hyperfine interaction of electron spins, confined in low-dimensional condensed matter systems, with the nuclear spins of the host lattice. Four emerging themes in condensed matter physics draw particular attention to this topic, making a Network-scale activity timely. Those themes are: i) advances in nanoscale control of matter, e.g. , quantum dots, where electrons interact with far fewer nuclear spins thereby greatly enhancing the effectiveness of hyperfine coupling; ii) emergence of spintronics devices employing the electron's spin rather than charge for future prospects of quantum repeaters, quantum computers, and quantum memory for secure communication and enhanced computation, iii) engineered interactions in novel materials, such as gating and tailoring of band structure, and iv) availability of high-quality fabrication facilities. There are three main thrusts in this Network: i) control of spin and electron-nuclear interaction in III-V semiconductor quantum dots [experiment: Harvard; theory: Harvard, Basel]; ii) coupling of nuclear spins via itinerant carriers (RKKY interaction) and nuclear magnetism in p-doped heterostructures [experiment: ETH; theory: UF, Basel, Harvard]; and iii) electron-nuclear interactions in 13C-enriched nanotubes [experiment: Harvard, theory: Harvard, Basel, UF]. By investigating the interface between fundamental and applied problems in an international environment, this Network contributes to the kind of cross-training of graduate students that is needed for the next generation of device engineers and scientists, perhaps working with quantum-coherent devices. Exchange of students between experimental groups at Harvard and ETH and between theoretical groups at Harvard, Basel, and UF will take place over the course of the project
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