Evolution of Superconducting and Hidden Order Phases in URu{sub 2}Si{sub 2} under Applied Pressure

Conference · Tue Jul 01 04:00:00 EDT 2008

OSTI ID:21091557

Maple, M Brian; Jeffries, Jason R; Butch, Nicholas P; Yukich, Benjamin T ^[1]

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1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (United States)

Electrical resistivity measurements performed under applied hydrostatic pressure and in magnetic fields have been used to probe the hidden order (HO) and superconducting (SC) states of URu{sub 2}Si{sub 2}, which have ambient-pressure transition temperatures T{sub 0} = 17.5 K and T{sub c} = 1.5 K, respectively. T{sub 0} increases with applied pressure and a distinct kink in its pressure dependence is observed at 15 kbar; this feature is associated with the onset of antiferromagnetism. The pressure dependence of the SC upper critical field has been measured with the external field aligned parallel to both crystalline axes. The SC phase is smoothly suppressed to a critical pressure of about 15 kbar and no qualitative change in the critical field curves is observed. The co-evolution of the HO and SC phases is discussed within the context of a model in which the two phases compete for Fermi surface fraction. (authors)

• Research Organization: Materials Research Society, 506 Keystone Drive, Warrendale, PA, 15086-7573 (United States)
• OSTI ID: 21091557
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CRITICAL FIELD
CRITICAL PRESSURE
ELECTRIC CONDUCTIVITY
FERMI LEVEL
PRESSURE DEPENDENCE
RUTHENIUM COMPOUNDS
SILICIDES
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TRANSITION TEMPERATURE
URANIUM COMPOUNDS