Prof. Dr. Dominik Zumbühl

Wintersemester 2006/2007: Intro to Meso Physics and Quantum Dots (web page)

organization of lecture

schedule and content

projects and presentations

literature

*last updated april 25, 2006 *

weekly lectures Tue, 9-11am, **Tue 2. Mai 8-10am**, Thur 8-10am, **NCCR room 2.04**

syllabus 2D electron gas, quantum point contacts, quantum dots, conductance fluctuations, quantum phase coherence, Coulomb blockade, Kondo effect, few electron dots, spin blockade, spin relaxation, charge sensing, single spin measurement, spin manipulation and coherence, nuclear spins, spin qubits, quantum computation.

for: masters and 6. semester bachelor students in nanoscience and physics. physics III lecture is a prerequisite

2 credit points I will be teaching this "Spezialvorlesung" for about 6 weeks, i.e. only half a semester. Instead of the 2 hours per week (for the 2 points), I was thinking to hold the lecture 2 times 2 hours per week to compensate for the 6 week length

purpose of this lecture is to bring the audience up to date of current experimental research in the field of quantum transport through nanostructures, focusing mainly on quantum dots in GaAs and spin-quibts in coupled dots. The lecture will inevitably discuss some (simple) condensed matter theory but **will mainly focus on experiments**

structure will be a combination of lectures on my part to intruduce the basics and subsequent presentations done by students towards the end of the 6 week lecture period on topics that can be chosen by students from a small selection. There will be no problem sets, but moderate amounts home reading will be assigned. The class is pass/fail, and the evaluation will be based on the presentation given by each student taking the class for credit. Sit-ins/students auditing the class (not for credit) **are welcome**

date | lecture content | |
---|---|---|

apr 5, wed, 9 am | preliminary meeting | |

apr 6, thur, 8-10 am | solid state physics backgroundcrystals, bands, effective mass approx., density of states, occupation of bands, intrinsic carrier concentration, doping (hand written manuscript) | |

apr 11, tue, 9-11 am | semiconductor surfaces and interfacessurface states, semiconductor-vacuum interface, band bending, Fermi level pinning, Schottky barrier and diode, GaAs 2D electron gases, screening, scattering (bulk and 2D), ohmic contacts, lateral gating lecture notes chapter 2: pdf | |

apr 13, thur, 8-10 am | experimental techniquessample fabrication, low temperature methods (chapter 4, Heinzel), quantum point contacts van Wees et al., PRL 60, 848 (1988) pdfvan Wees et al., PRB 38, 3625 (1988) pdf | |

apr 18, tue, 9-11 am | concepts in mesoscopic physicsDrude conductivity, Einstein relation, mesoscopic time and length scales, classical Hall effect, (integer) quantum Hall effect, 1D subbands, quantum point contacts, 0.7 structure Cronenwett et al., PRL 88, 226805 (2002) pdf(lecture notes chapter 3: pdf) | |

apr 20, thur, 8-10 am | quantum dots Iopen and closed dot regimes, Coulomb Blockade, quantum confinement energy, constant interaction model, Coulomb diamonds, ground state and excited state spectroscopy, sequential and cotunneling transport, Coulomb peak lineshapes lecture: pdf articles: Kouwenhoven et al., dot review article, pp 1-28 pdf van Houten et al., CB review, NATO ASI, pp 1-15 pdf Foxman et al., PRB47, 10020 (1993) pdf Foxman et al., PRB50, 14193 (1994) pdf | |

apr 25, tue, 9-11 am | quantum dots IILandauer-Büttiker formalism, open dot regime, conductance fluctuations, weak localization and antilocalization, Kondo effect, few electron dots lecture pdf literature: A. Huibers, Ph. D. Thesis (1999) and S. Cronenwett, Ph. D. Thesis (2001) are available on the marcuslab webpage. open dot regime Huibers et al., PRL83, 5090 (1999) pdf Kondo effect Goldhaber-Gordon et al., Nature 391, 156 (1998) pdf Cronenwett et al., Science 281, 540 (1998) pdf Few Electron DotsTarucha et al., PRL77, 3613 (1996) pdf Ciorga et al., PRB61, 16315 (2000) pdf Kouwenhoven et al., Science 278, 1788 (1997) pdf Kouwenhoven, Austing & Tarucha, RPP 64, 701 (2002) pdf | |

apr 27, thur, 8-10 am | quantum dots IIIdouble quantum dots, honey comb stability diagrams, finite bias transport lecture pdf 2 student presentations | Oded, charge sensing Oren, charge manipul. |

may 2, tue, 8-10 am | 3 student presentations | Frank, spin filtering Roman, spin blockade Martha, spin relaxation |

may 4, thur, 8-10am | 3 student presentations | Lukas, spin readout Florian, nuclear spins Daniel, spin coherence |

topic | refs |
---|---|

charge sensing | Field et al., PRL70, 1311 (1993) pdfElzerman et al., PRB 67, 161308R (2003) pdf DiCarlo et al., PRL 92, 226801 (2004) pdf |

charge manipulation | Hayashi et al., PRL91, 226804 (2003) pdf Petta et al., PRL 93, 186802 (2004) pdf |

spin blockade | Ono et al., Science 297, 1315 (2002) pdfJohnson et al., PRB 72, 165308 (2005) pdf |

spin relaxation | Fujisawa et al., Nature 419, 278 (2002) pdfHanson et al., PRL 91, 196802 (2003) pdf |

spin filtering | Potok et al., PRL89, 266602 (2002) pdfFolk et al., Science 299, 679 (2003) pdfHanson et al., PRB 70, 241304R (2004) pdf |

single spin readout | Elzerman et al., Nature 430, 431 (2004) pdfHanson et al., PRL 94, 196802 (2005) pdf |

nuclear spins | Johnson et al., Nature 435, 925 (2005) pdfKoppens et al., Science 309, 134 (2005) pdf |

spin coherence | Petta et al., Science 309, 2180 (2005) pdf |

**books**

“*Mesoscopic Electronics in Solid State Nanostructures*”, Thomas Heinzel, Wiley-VCH (2003)

“*Electronic Transport in Mesoscopic Systems*”, Supriyo Datta, Cambridge Universy Press (1995)

“*The Physics of Low-Dimensional Semicond.*”, John H. Davies, Cambridge University Press (1998)

**review articles**

“*Quantum Transport in Semiconductor Nanostructures*”, C. W. J. Beenakker and H. van Houten, published in Solid State Physics, 44, 1-228 (1991) (out of print, available at arXive:cond-mat/0412664) pdf

“*Electron Transport in Quantum Dots*”, L. P. Kouwenhoven, C. M. Marcus, P. L. McEuen, S. Tarucha, R. M. Westervelt and N. Wingreen, NATO ASI conference proceedings, edited by L. L. Sohn, L. P. Kouwenhoven and G. Schön (Kluwer, Dordrecht, 1997). pdf

“*Coulomb Blockade Oscillations in Semiconductor Nanostructures*”, H. van Houten, C. W. J. Beenakker and A. A. M. Staring, published in *Single Charge Tunneling*, edited by H. Grabert and M. H. Devoret, NATO ASI series B294 (Plenum, New York, 1992), (out of print, available at arXive:cond-mat/0508454). pdf

“*Few-Electron Quantum Dots*”, L. P. Kouwenhoven, D. G. Austing and S. Tarucha, Rep. Prog. Phys. **64**, 701 (2001). pdf

“*Recipes for Spin Based Quantum Computing*”, V. Cerletti, W. A. Coish, O. Gywat and D. Loss, Nanotechnology **16**, R27 (2005). pdf