Two types of superconducting pairs in stripe-ordered La 2 - x Ba x CuO 4 ( x = 1 / 8 ) : Evidence from resistivity measurements
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics; Stony Brook University, NY (United States)
Recent angle-resolved c-axis resistivity measurements of the stripe-ordered La2-xBaxCuO4 (LBCO) with x = 1/8 revealed an unexpected dependence on the direction of the in-plane magnetic field. We argue that these and other available data for the c-axis transport point to the existence of superconducting pairs of two different types in the x = 1/8 LBCO below the stripe ordering temperature. The pairs of one type carry finite momentum and are confined to the Cu-O planes; the pairs of other type (probably the conventional d wave with zero momentum) propagate along narrow conducting channels traversing the sample in the c-axis direction. The evidence for this comes from the observed exponential temperature dependence of the c-axis resistivity ρc (T ) which we attribute to the thermally excited slips of the superconducting phase and flux flows. We present a simple theory to fit the observed π/2-periodic dependence of ρc on the direction of the in-plane magnetic field and the other data.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- Grant/Contract Number:
- SC0012704; PHY-1748958
- OSTI ID:
- 1963582
- Report Number(s):
- BNL-224185-2023-JAAM; TRN: US2313151
- Journal Information:
- Physical Review. B, Vol. 107, Issue 8; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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