Multiple phases with intertwined magnetic and superconducting orders in Nd-doped CeCoIn5
Duk Y. Kim, Shi-Zeng Lin, Franziska Weickert, P. F. S. Rosa, Eric D. Bauer, Filip Ronning, J. D. Thompson, Roman Movshovich
DOI 10.1103/PhysRevB.97.245120 · Physical Review B
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Abstract
The thermal conductivity of heavy-fermion superconductor Ce0.95Nd0.05CoIn5 was measured with a magnetic field rotating in the tetragonal a−b plane. The thermal conductivity exhibits a step within the high-field low-temperature (HFLT) phase, which exists above 8 Tesla within the superconducting state, when field is rotated through the antinodal [100] direction of the superconducting d-wave order parameter. This anomaly indicates the presence of a third order parameter within the HFLT phase, similar to that of pure CeCoIn5. Therefore, the HFLT state with triply intertwined orders, i.e., superconducting d-wave, magnetic spin-density wave (SDW), and a putative superconducting p-wave pair-density wave (PDW), is robust against 5% Nd doping. The second magnetic phase within the superconducting state below 8 Tesla, a low-field SDW, displays a hysteresis in thermal conductivity as a function of field magnitude, which is also revealing the existence of a third order consistent with a p-wave PDW. Given different origins and properties of the HFLT and low-field SDW states, the presence of three intertwined orders in both phases is remarkable and of far-reaching consequences.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ce0.95Nd0.05CoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.6 | Pressure not reported | onset |
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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