Optical Spectroscopy of Quantum-Layered Semiconductors in   High Magnetic Field
{'Code': '03070003', 'Directorate': {'Abbreviation': 'MPS', 'LongName': 'Direct For Mathematical & Physical Scien'}, 'Division': {'Abbreviation': 'DMR', 'LongName': 'Division Of Materials Research'}}
{'SignBlockName': 'H. Hollis Wickman', 'PO_EMAI': None, 'PO_PHON': None}
The recent fabrication of high-quality semiconductor                            heterostructures has led to novel and remarkable physics                        discovered in two-dimensional electron gas systems.  Magneto-                   transport experiments have shown that resistivity anomalies occur               when the electrons have fractional values for Landau level                      filling.  Subsequent theoretical studies revealed that the                      fractional quantum Hall effect is a manifestation of a new                      cooperative many-body electron fluid.  although most of the                     experiments use electrical transport, our recent optical                        investigations will lead to a better understanding of the                       condensed electron state and possibly to new electron-electron                  interactions.  This work will be an optical study of the two-                   dimensional electron system in GaAs quantum wells to temperatures               as low as .05K and dc magnetic fields to 30 tesla.  Spectroscopic               techniques involve bandgap emission, adsorption and reflectivity,               and inelastic light scattering.  New fiber-optic systems will be                implemented for light scattering experiments at these extrema of                temperature and magnetic field.
[{'FirstName': 'Don', 'LastName': 'Heiman', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Don Heiman', 'EmailAddress': 'd.heiman@neu.edu', 'NSF_ID': '000441744', 'StartDate': '02/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}, {'FirstName': 'Aron', 'LastName': 'Pinczuk', 'PI_MID_INIT': None, 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Aron Pinczuk', 'EmailAddress': 'ap359@columbia.edu', 'NSF_ID': '000210439', 'StartDate': '02/15/1989', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}]
{'Name': 'Massachusetts Institute of Technology', 'CityName': 'CAMBRIDGE', 'ZipCode': '021394301', 'PhoneNumber': '6172531000', 'StreetAddress': '77 MASSACHUSETTS AVE', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Massachusetts', 'StateCode': 'MA', 'CONGRESSDISTRICT': '07', 'CONGRESS_DISTRICT_ORG': 'MA07', 'ORG_UEI_NUM': 'E2NYLCDML6V1', 'ORG_LGL_BUS_NAME': 'MASSACHUSETTS INSTITUTE OF TECHNOLOGY', 'ORG_PRNT_UEI_NUM': 'E2NYLCDML6V1'}
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{'Code': '1761', 'Text': 'SOLID STATE PHYSICS'}
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