Zhao, Guo-meng ; Kirtikar, Vidula ; Singh, K. K. ; Sinha, A. P. B. ; Morris, Donald E. ; Inyushkin, A. V. (1996) Large copper isotope effect in oxygen depleted YBa2Cu3Oy: importance of Cu-dominated phonon modes in the pairing mechanism Physical Review B: Condensed Matter and Materials Physics, 54 (21). pp. 14956-14959. ISSN 1098-0121
Full text not available from this repository.
Official URL: http://prb.aps.org/abstract/PRB/v54/i21/p14956_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.54.14956
Abstract
We have measured the copper isotope effect in YBa2Cu3Oy. We find a large positive copper-isotope exponent (α Cu≈0.37) in the underdoped plateau region (y~6.6). The exponent decreases to zero (or slightly negative) in the optimally doped region (y~6.94). The α Cu in YBa2Cu3O6.6 is similar to the α O (oxygen-isotope exponent) in YBa2-xLaxCu3Oy with the same Tc. These comparable values of α Cu and α O show that phonons which involve Cu motion as well as the (high-frequency) modes of the oxygen in the CuO2 planes are important in the pairing mechanism.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 48922 |
| Deposited On: | 19 Jul 2011 07:29 |
| Last Modified: | 19 Jul 2011 07:29 |
Repository Staff Only: item control page
