Recent developments in the 3-Kelvin phase of Sr2RuO4

✍ Scribed by Hiroshi Yaguchi; Yoshiteru Maeno

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 399 KB
• Volume: 408-410
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2004.02.085

✦ Synopsis

Enhanced superconductivity in the eutectic system Sr 2 RuO 4 -Ru is referred to as the 3-K phase of Sr 2 RuO 4 because of its enhanced superconducting transition temperature T c of $3 K whilst the superconductivity in Sr 2 RuO 4 (T c of $1.5 K) is called the 1.5-K phase. We describe basic properties of the 3-K phase and focus on its field-temperature (H -T ) phase diagram. We suggest that the 3-K phase is attributable to surface superconductivity with a two-component order parameter (chiral state) occurring at the interface between Sr 2 RuO 4 and Ru inclusions.