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Topics in electron dynamics in moder...

Harvard University.

Topics in electron dynamics in moderate magnetic fields.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Topics in electron dynamics in moderate magnetic fields.
作者:	Parrott, Robert Ellis Frederick.
面頁冊數:	251 p.
附註:	Adviser: Eric J. Heller.
附註:	Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2617.
Contained By:	Dissertation Abstracts International67-05B.
標題:	Physics, Condensed Matter.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217846
ISBN:	9780542693632

Topics in electron dynamics in moderate magnetic fields.
Parrott, Robert Ellis Frederick.

Topics in electron dynamics in moderate magnetic fields. - 251 p.

Adviser: Eric J. Heller.

Thesis (Ph.D.)--Harvard University, 2006.

The dynamics of charged particles in moderate magnetic fields can present a theoretical challenge in many systems. Weak magnetic fields may break symmetries in a system, but the dynamics of the particle are usually only slightly perturbed. Alternatively if the field is very strong, the underlying system tends to become one dimensional, particularly in the case of the Quantum Hall Effect in mesoscopic systems, or plasma systems in strong magnetic fields, where the particles follow flux lines. In this thesis we consider systems where neither extreme holds.

ISBN: 9780542693632Subjects--Topical Terms:

226939
Physics, Condensed Matter.

Topics in electron dynamics in moderate magnetic fields.
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245 1 0 $a Topics in electron dynamics in moderate magnetic fields.
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502 $a Thesis (Ph.D.)--Harvard University, 2006.
520 # $a The dynamics of charged particles in moderate magnetic fields can present a theoretical challenge in many systems. Weak magnetic fields may break symmetries in a system, but the dynamics of the particle are usually only slightly perturbed. Alternatively if the field is very strong, the underlying system tends to become one dimensional, particularly in the case of the Quantum Hall Effect in mesoscopic systems, or plasma systems in strong magnetic fields, where the particles follow flux lines. In this thesis we consider systems where neither extreme holds.
520 # $a The first Chapter analyzes high Rydberg antihydrogen states in a strong magnetic field, where the effect of the magnetic field can be as important as the Coulomb well. We find that the system can be considered in the center-of-mass coordinates with a conserved quantum number, the pseudomomentum. The states that are produced can be highly asymmetric, and when placed in an ionizing electric field, the dynamics complicated. We identify two extreme cases of the motion, and using classical simulations find a relation between an ionization field and transverse anti-atom size.
520 # $a The last three Chapters extend the SPM tip imaging theory in 2DEGs to include more general tip imaging mechanisms. We consider how a realistic SPM tip scatters electrons classically, and then what type of fringe patterns such a deflection produces, deriving a formula that connects the scattering angle to the fringe pattern local to the tip. We then consider an SPM tip imaging of the magnetic focussing of electrons in a 2DEG, and characterize the results in terms of the novel effects of a soft weak tip on the electron flow.
520 # $a The next Chapter considers semiclassical dynamics of electrons in a large chaotic quantum dot in a perpendicular magnetic field. The device allows the conductance of the system to be probed in energy and magnetic field, and strong interference bands are identified in the (E, B) plane. We identify these bands as due to scarred states in the large dot, and connect the features of the bands to changes in the dynamics of periodic orbits in the system.
590 $a School code: 0084.
650 # 0 $a Physics, Condensed Matter. $3 226939
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