期刊
PHYSICAL REVIEW B
卷 79, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.245114
关键词
crystal structure; doping profiles; electrical resistivity; magnetic susceptibility; magnetic transitions; metal-insulator transition; short-range order; specific heat; vanadium compounds
资金
- National Science Foundation [DMR02-13706, DMR-0703095]
- National Synchrotron Light Source, Brookhaven National Laboratory
- U. S. DOE, BES [DE-AC02-98CH10886]
- National Science Foundation Graduate Research Foundation
Although many materials display the transition from insulating to metallic behavior on doping, only a few, such as VO2, have the right combination of crystal structure and physical properties to serve as model systems. Here we report the electronic and structural characteristics of the insulator to metal transition in V1-xMoxO2, which we have studied over the range 0.0 < x < 0.50 through characterization of the electrical resistivity, magnetic susceptibility, specific heat, and average- and short-range crystal structures. We find that metal-metal pairing exists in small domains in the doped metallic phases and an unexpected phenomenology for the crossover between a Curie-Weiss insulating regime and an intermediate mass metallic regime. An electronic phase diagram is presented.
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