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Two types of superconducting pairs in stripe-ordered La 2-x Ba x CuO 4 (x=1/8) : Evidence from resistivity measurements

Journal Article · · Physical Review. B
 [1];  [2];  [2];  [1];  [1]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States). Condensed Matter Physics; Stony Brook University, NY (United States)
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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
OSTI ID:
1963582
Report Number(s):
BNL-224185-2023-JAAM
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 8 Vol. 107; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (12)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 5)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 6)figure FIG. 6
FIG. 7(p. 7)figure FIG. 7
FIG. 8(p. 7)figure FIG. 8
FIG. 10(p. 8)figure FIG. 10
FIG. 11(p. 8)figure FIG. 11
FIG. 9(p. 8)figure FIG. 9
FIG. 12(p. 13)figure FIG. 12

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Cuprates
high-temperature superconductors
resistivity measurements
stripes
strongly correlated systems
superconductivity