PT - JOURNAL ARTICLE
AU - von Klitzing, Klaus
TI - Developments in the quantum Hall effect
DP - 2005 Sep 15
TA - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
PG - 2203--2219
VI - 363
IP - 1834
4099 - http://rsta.royalsocietypublishing.org/content/363/1834/2203.short
4100 - http://rsta.royalsocietypublishing.org/content/363/1834/2203.full
SO - Philos Transact A Math Phys Eng Sci2005 Sep 15; 363
AB - The most important applications of the quantum Hall effect (QHE) are in the field of metrology. The observed quantization of the resistance is primarily used for the reproduction of the SI unit ohm, but is also important for high precision measurements of both the fine structure constant and the Planck constant. Some current QHE research areas include the analysis of new electronâ€“electron correlation phenomena and the development of a more complete microscopic picture of this quantum effect. Recently, scanning force microscopy (SFM) of the potential distribution in QHE devices has been used to enhance the microscopic understanding of current flow in quantum Hall systems. This confirms the importance of the theoretically predicted stripes of compressible and incompressible electronic states close to the boundary of the QHE devices.