MacLaughlin, D. E. ; Tien, Cheng ; Gupta, L. C. ; Aarts, J. ; Boer, F. R. de ; Fisk, Z. (1984) Nuclear quadrupole resonance and heavy-fermion superconductivity in CeCu2Si2 Physical Review B, 30 (3). pp. 1577-1579. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v30/i3/p1577_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.30.1577
Abstract
63Cu nuclear quadrupole resonance (NQR) has been observed in the ternary compound CeCu2Si2 which, when stoichiometric, is a heavy-fermion superconductor. In a superconducting specimen (Tc≈0.6 K) the observed temperature dependence of the spin-lattice relaxation rate 1/T1(T) is consistent with a conventional quasiparticle excitation spectrum below Tc, with a pair-breaking parameter approximately half the value for suppression of superconductivity. Features in 1/T1(T) between Tc and 1.2 K appear to signal a phase transition, possibly structural in nature. NQR data from a nonsuperconducting sample are consistent with extensive disorder in the Cu site occupation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 11315 |
| Deposited On: | 09 Nov 2010 03:35 |
| Last Modified: | 02 Jun 2011 06:25 |
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