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Design and Construction of Low-Temperature Scanning Tunnelling Microscope for Spectroscopy

Lindahl, Joakim LU (1998)
Abstract
This thesis discusses some of the fundamental requirements needed to be fulfilled when constructing a low temperature scanning tunnelling microscope (STM). Three different designs, two non-vacuum and one ultra-high vacuum (UHV), based on either inertial-mass or novel stepper motor principles are presented. The selection rules that forms the basis for designs are discussed in terms of thermophysical properties (such as thermal expansion and conductivity) and mechanical properties (such as stiffness and structural damping), and are exemplified by experimental results both known from literature and as found during the thesis work.



Furthermore, the application of STM as a local probe for investigation of optical properties... (More)
This thesis discusses some of the fundamental requirements needed to be fulfilled when constructing a low temperature scanning tunnelling microscope (STM). Three different designs, two non-vacuum and one ultra-high vacuum (UHV), based on either inertial-mass or novel stepper motor principles are presented. The selection rules that forms the basis for designs are discussed in terms of thermophysical properties (such as thermal expansion and conductivity) and mechanical properties (such as stiffness and structural damping), and are exemplified by experimental results both known from literature and as found during the thesis work.



Furthermore, the application of STM as a local probe for investigation of optical properties of low-dimensional III-V semiconductors at low-temperatures is discussed. Photon emission as a result from local injection of carriers using an STM tip, scanning tunnelling luminescence (STL), has been studied for three different low-dimensional systems: quantum wells (QW), quantum wires (QWR), and quantum dots (QD). It is demonstrated that it is possible to excite an individual low-dimensional structure, using the spatial resolution of the STM. Employed tips have been made of both wide bandgap semiconductors and metalls. (Less)
Please use this url to cite or link to this publication:
author
opponent
  • Prof. Shih, C.K., University of Texas in Austin, USA.
organization
publishing date
type
Thesis
publication status
published
subject
keywords
mechanical properties, thermophysical properties, stepper motor, ultra-high vacuum, inertial-mass, low temperatures, scanning tunneling microscopy, optical propertie, Fysik, Semiconductory physics, Physics, scanning tunneling luminescence, local probe, photon emission, local carrier injection, Halvledarfysik, Fysicumarkivet A:1998:Lindahl
pages
240 pages
publisher
Joakim Lindahl, Örnvägen 78:123, S-22731 Lund, Sweden.,
defense location
June 12 at 13.15, Lecture Hall A at Department of Physics.
defense date
1998-06-12 13:15
external identifiers
  • Other:ISRN: LUFTD2/(TFFF-0052)/1-240
ISBN
91-628-3042-2
language
English
LU publication?
yes
id
a8a8a019-0fa3-4b59-950e-343cc188b0e3 (old id 18885)
date added to LUP
2007-05-24 12:41:11
date last changed
2016-09-19 08:45:13
@misc{a8a8a019-0fa3-4b59-950e-343cc188b0e3,
  abstract     = {This thesis discusses some of the fundamental requirements needed to be fulfilled when constructing a low temperature scanning tunnelling microscope (STM). Three different designs, two non-vacuum and one ultra-high vacuum (UHV), based on either inertial-mass or novel stepper motor principles are presented. The selection rules that forms the basis for designs are discussed in terms of thermophysical properties (such as thermal expansion and conductivity) and mechanical properties (such as stiffness and structural damping), and are exemplified by experimental results both known from literature and as found during the thesis work.<br/><br>
<br/><br>
Furthermore, the application of STM as a local probe for investigation of optical properties of low-dimensional III-V semiconductors at low-temperatures is discussed. Photon emission as a result from local injection of carriers using an STM tip, scanning tunnelling luminescence (STL), has been studied for three different low-dimensional systems: quantum wells (QW), quantum wires (QWR), and quantum dots (QD). It is demonstrated that it is possible to excite an individual low-dimensional structure, using the spatial resolution of the STM. Employed tips have been made of both wide bandgap semiconductors and metalls.},
  author       = {Lindahl, Joakim},
  isbn         = {91-628-3042-2},
  keyword      = {mechanical properties,thermophysical properties,stepper motor,ultra-high vacuum,inertial-mass,low temperatures,scanning tunneling microscopy,optical propertie,Fysik,Semiconductory physics,Physics,scanning tunneling luminescence,local probe,photon emission,local carrier injection,Halvledarfysik,Fysicumarkivet A:1998:Lindahl},
  language     = {eng},
  pages        = {240},
  publisher    = {ARRAY(0xa1ee440)},
  title        = {Design and Construction of Low-Temperature Scanning Tunnelling Microscope for Spectroscopy},
  year         = {1998},
}