Observation of Andreev Surface Bound States in the 3-K Phase Region of Sr{sub 2}RuO{sub 4}

Journal Article · Mon Jul 16 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.87.037003· OSTI ID:40277129

Mao, Z Q; Nelson, K D; Jin, R; Liu, Y; Maeno, Y

The tunneling spectrum of the superconducting phase with T{sub c}{approx_equal}3.0 K has been measured in the Ru-embedded region of Sr{sub 2}RuO {sub 4} using cleaved junctions. A sharp zero-bias conductance peak (ZBCP) has been observed below 3K. All characteristics of this ZBCP suggest that it originates from Andreev surface bound states, indicating that the pairing in the 3-K phase is also non-s -wave. Below the bulk T{sub c} of Sr{sub 2}RuO {sub 4} ({approx_equal}1.5 K) , a crossover from sharp to bell-shaped ZBCP was found. This supports the theory that there is a phase transition in the 3-K phase region near the bulk T{sub c} .

• Sponsoring Organization: (US)
• OSTI ID: 40277129
• Journal Information: Physical Review Letters, Vol. 87, Issue 3; Other Information: DOI: 10.1103/PhysRevLett.87.037003; Othernumber: PRLTAO000087000003037003000001; 034128PRL; PBD: 16 Jul 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOUND STATE
TUNNELING
SUPERCONDUCTIVITY
STRONTIUM COMPOUNDS
RUTHENIUM COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTING DEVICES