Abstract
With only a few exceptions that are well understood, conventional superconductivity does not coexist with long-range magnetic order (for example, ref. 1). Unconventional superconductivity, on the other hand, develops near a phase boundary separating magnetically ordered and magnetically disordered phases2,3. A maximum in the superconducting transition temperature Tc develops where this boundary extrapolates to zero Kelvin, suggesting that fluctuations associated with this magnetic quantum-critical point are essential for unconventional superconductivity4,5. Invariably, though, unconventional superconductivity masks the magnetic phase boundary when T < Tc, preventing proof of a magnetic quantum-critical point5. Here we report specific-heat measurements of the pressure-tuned unconventional superconductor CeRhIn5 in which we find a line of quantum–phase transitions induced inside the superconducting state by an applied magnetic field. This quantum-critical line separates a phase of coexisting antiferromagnetism and superconductivity from a purely unconventional superconducting phase, and terminates at a quantum tetracritical point where the magnetic field completely suppresses superconductivity. The T → 0 K magnetic field–pressure phase diagram of CeRhIn5 is well described with a theoretical model6,7 developed to explain field-induced magnetism in the high-Tc copper oxides, but in which a clear delineation of quantum–phase boundaries has not been possible. These experiments establish a common relationship among hidden magnetism, quantum criticality and unconventional superconductivity in copper oxides and heavy-electron systems such as CeRhIn5.
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References
Muller, K.-H. & Narozhnyi, V. N. Interaction of superconductivity and magnetism in borocarbide superconductors. Rep. Prog. Phys. 64, 943–1008 (2001)
Moriya, T. & Ueda, K. Antiferromagnetic spin fluctuations and superconductivity. Rep. Prog. Phys. 66, 1299–1341 (2003)
Curro, N. J. et al. Unconventional superconductivity in PuCoGa5 . Nature 434, 622–625 (2005)
Coleman, P. & Schofield, A. J. Quantum criticality. Nature 433, 226–229 (2005)
Mathur, N. D. et al. Magnetically mediated superconductivity in heavy fermion compounds. Nature 394, 39–43 (1998)
Demler, E., Sachdev, S. & Zhang, Y. Spin-ordered quantum transitions of superconductors in a magnetic field. Phys. Rev. Lett. 87, 067202 (2001)
Zhang, Y., Demler, E. & Sachdev, S. Competing orders in magnetic field: spin and charge order in the cuprate superconductors. Phys. Rev. B 66, 094501 (2002)
Fujita, M. et al. Magnetic and superconducting phase diagram of electron-doped Pr1-xLaCexCuO4 . Phys. Rev. B 67, 014514 (2003)
Demler, E., Hanke, W. & Zhang, S.-C. SO(5) theory of antiferromagnetism and superconductivity. Rev. Mod. Phys. 76, 909–974 (2004)
Lefebvre, S. et al. Mott transition, antiferromagnetism, and unconventional superconductivity in layered organic superconductors. Phys. Rev. Lett. 85, 5420–5423 (2000)
Hegger, H. et al. Pressure-induced superconductivity in quasi-2D CeRhIn5 . Phys. Rev. Lett. 84, 4986–4989 (2000)
Nicklas, M. et al. Two superconducting phases in CeRh1-xIrxIn5 . Phys. Rev. B 70, 020505R (2004)
Mito, T. et al. Coexistence of antiferromagnetism and superconductivity near the quantum criticality of the heavy-fermion compound CeRhIn5 . Phys. Rev. Lett. 90, 077004 (2003)
Fisher, R. A. et al. Specific heat of CeRhIn5: pressure-driven evolution of the ground state from antiferromagnetism to superconductivity. Phys. Rev. B 65, 224509 (2002)
Llobet, A. et al. Magnetic structure of CeRhIn5 as a function of pressure and temperature. Phys. Rev. B 69, 024403 (2004)
Shishido, H. et al. A drastic change of the Fermi surface at a critical pressure in CeRhIn5: dHvA study under pressure. J. Phys. Soc. Jpn 74, 1103–1106 (2005)
Bao, W. et al. Incommensurate magnetic structure of CeRhIn5 . Phys. Rev. B 62, R14621 (2000)
Cornelius, A. L. et al. Field-induced magnetic transitions in the quasi-two-dimensional heavy-fermion antiferromagnets CenRhIn3n+2 (n = 1 or 2). Phys. Rev. B 64, 144411 (2001)
Knebel, G. et al. High-pressure phase diagrams of CeRhIn5 and CeCoIn5 studied by ac calorimetry. J. Phys. Condens. Matter 16, 8905–8922 (2004)
Si, Q. et al. Locally critical quantum phase transitions in strongly correlated metals. Nature 413, 804–808 (2001)
Lake, B. et al. Antiferromagnetic order induced by an applied magnetic field in a high-temperature superconductor. Nature 415, 299–302 (2002)
Lake, B. et al. Spins in the vortices of a high-temperature superconductor. Science 291, 1759–1762 (2001)
Khaykovich, B. et al. Field-induced transition between magnetically disordered and ordered phases in underdoped La2-xSrxCuO4 . Phys. Rev. B 71, 220508R (2005)
Kang, H. J. et al. Antiferromagnetic order as the competing ground state in electron-doped Nd1.85Ce0.15CuO4 . Nature 423, 522–525 (2003)
Panagopoulos, C. et al. Evidence for a generic quantum transition in high-Tc cuprates. Phys. Rev. B 66, 064501 (2002)
Acknowledgements
The authors thank Y. K. Bang, A. V. Balatsky and N. J. Curro for discussions. Work at Los Alamos National Laboratory was performed under the auspices of the United States Department of Energy Office of Science. H.Q.Y. acknowledges an ICAM postdoctoral fellowship.
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Supplementary information
Supplementary Methods
Details of ac calorimetric measurements under pressure. (DOC 23 kb)
Supplementary Figure
H-T phase diagram of CeRhIn5 at various pressures, showing the evolution of the coexisting phase of SC and AFM with pressure. (DOC 271 kb)
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Park, T., Ronning, F., Yuan, H. et al. Hidden magnetism and quantum criticality in the heavy fermion superconductor CeRhIn5. Nature 440, 65–68 (2006). https://doi.org/10.1038/nature04571
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DOI: https://doi.org/10.1038/nature04571
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