Insulator to correlated metal transition in V_1-xMo_xO_2

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Nature Physics

OSTI ID:956416

Klimczuk, Tomasz ^[1]; Ronning, Filip ^[1]; Holman, Katherine ^[2]; Mcqueen, Tyrel M ^[2]; Williams, Anthony J ^[3]; Stephens, P W ^[4]; Zandbergen, Henny W ^[5]; Xu, Q ^[5]; Cava, Robert J ^[2]

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1. Los Alamos National Laboratory
2. PRINCETON UNIV
3. PRINDCETON UNIV
4. BNL
5. DELFT INSTIT OF TECH

The change from metallic to insulating states is one of the most dramatic transitions that solids undergo on cooling or chemical doping. Many materials display this transition, but only a handful have the right combination of crystal structure and physical properties to serve as model systems. VO{sub 2} is one of those materials. Using Mo as a chemical dopant in VO{sub 2}, we find unanticipated phenomenology for both the electronic and structural characteristics of the resulting insulator to metal transition. The results support a complex, previously proposed scenario involving the coexistence of both electron repulsion and electron pairing for yielding an insulator in VO{sub 2}, but not simply; many issues are raised about local versus itinerant behavior and structure-property correlations in this most iconic ofdoped correlated electron systems.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956416
• Report Number(s): LA-UR-09-00890; LA-UR-09-890; TRN: US201013%%106
• Journal Information: Nature Physics, Journal Name: Nature Physics
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
PHYSICAL PROPERTIES
VANADIUM OXIDES
MOLYBDENUM
DOPED MATERIALS
PHASE TRANSFORMATIONS
METALS
ELECTRICAL INSULATORS