Magnetic field effect on the pressure-induced superconducting state in the hole-doped two-leg ladder compound Sr2Ca12Cu24O41
T. Nakanishi, N. Motoyama, H. Mitamura, N. Takeshita, H. Takahashi, H. Eisaki, S. Uchida, N. Môri
DOI 10.1103/PhysRevB.72.054520 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report electrical resistivity on a single crystal of the hole-doped two-leg ladder compound Sr2Ca12Cu24O41, which becomes superconducting with Tc∼5K only at pressures above ∼3.0GPa. Measurements were performed at nearly hydrostatic pressures up to 5.7GPa and low temperatures down to 100mK under static magnetic fields up to 20T parallel to the a axis (along the ladder rungs) and up to 7T parallel to both the b axis (perpendicular to the ladder plane) and the c axis (along the ladder legs). A clear difference in the resistive upper critical field Hc2(T) is observed among these three directions, confirming that this system has a highly anisotropic superconducting ground state. Also, Hc2(T) parallel to the ladder plane is found to exceed the Pauli limit by a factor of more than 2, suggesting either a strong spin-orbit scattering or spin-triplet pairing. Furthermore, it is implied, from measurements of resistivity versus angle of magnetic field in the bc plane, that another superconducting phase is stable below around 3K only when the magnetic field is applied exactly along a certain direction that is ±35° from the ladder direction.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2Ca12Cu24O41 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | 3.5 GPa | onset |
| Sr2Ca12Cu24O41 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | 4 GPa | onset |
| Sr2Ca12Cu24O41 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | 4.5 GPa | onset |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.2 | Pressure unresolved | unknown |
Similar papers
Pressure-Induced Dimensional Crossover and Superconductivity in the Hole-Doped Two-Leg Ladder Compound Sr14−xCaxCu24O41
similarity 0.96T. Nagata et al.
Source status unknown — claims are unverified
Robust superconductivity in quantum-confined Pb: Equilibrium and irreversible superconductive properties
similarity 0.95Mustafa M. Özer et al.
Source status unknown — claims are unverified
Anomalous precursor diamagnetism at low reduced magnetic fields and the role of TC inhomogeneities in the superconductors Pb55In45 and underdoped La1.9Sr0.1CuO4
similarity 0.94Lucía Cabo et al.
Source status unknown — claims are unverified
Topological magnetic irreversibility in superconducting Pb samples of various shapes
similarity 0.94Saül Vélez et al.
Source status unknown — claims are unverified
Tunneling and break junction spectroscopy of the ambient-pressure semiconducting and superconducting gap structures in the ladder compound (Sr, Ca)14Cu24O41
similarity 0.94Toshikazu Ekino et al.
Source status unknown — claims are unverified
Structural and electrical properties under high pressure for the superconducting spin-ladder system Sr0.4Ca13.6Cu24O41+δ
similarity 0.94M. Isobe et al.
Source status unknown — claims are unverified