Coherence and Groundstate Properties of Highly Correlated   f-Electron System: Kondo Lattice and Heavy Fermion Studies  (Materials Research)
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This research effort is focused on establishing a better                        understanding of the unusual phenomena, i.e., heavy fermion,                    Kondo and Kondo lattice, spin fluctuation and mixed valent                      behavior, which appear in highly correlated f-electron systems.                 Such phenomena are commonly associated with a delocalization of                 the f-electrons due to a f-electron hybridization with other f-                 electrons or spd-electrons.  The high temperature behavior                      associated with these systems seems to be well described by                     single ion models; however, at low temperatures these systems                   display coherent fermi liquid-like behavior.  This research is                  directed at studying the salient features associated with this                  coherent groundstate.  Measurements of the temperature and                      hydrostatic pressure dependence of the electrical resistivity,                  specific heat, magneto-transport coefficients and magnetic                      susceptibility on a select number of mixed valent and heavy                     fermion systems are planned.  These measurements will be                        supplemented by measurements of the temperature dependence of the               thermal electric power and thermal expansion along with room                    temperature crystal structure studies.  The objective of this                   research is to establish the role played by the indirect f-f and                f-spd exchange interactions, and other factors such as crystal                  field levels, the Kondo temperature, etc., on both the coherent                 state and on the nature of long range correlations, e.g.,                       superconductivity and magnetic order, within this groundstate.
[{'FirstName': 'Jack', 'LastName': 'Crow', 'PI_MID_INIT': 'E', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Jack E Crow', 'EmailAddress': 'crow@magnet.fsu.edu', 'NSF_ID': '000125101', 'StartDate': '05/15/1988', 'EndDate': None, 'RoleCode': 'Co-Principal Investigator'}, {'FirstName': 'Ted', 'LastName': 'Mihalisin', 'PI_MID_INIT': 'W', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Ted W Mihalisin', 'EmailAddress': None, 'NSF_ID': '000427777', 'StartDate': '05/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}]
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{'Code': '1761', 'Text': 'SOLID STATE PHYSICS'}
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