09915nas a2200181 4500008004100000245006500041210006300106490000700169520935100176100001909527700002009546700001909566700002109585700001909606700002109625700002009646856006709666 1991 eng d00aSite-selective oxygen-isotope substitution in YBa2Cu3O7−δ0 aSiteselective oxygenisotope substitution in YBa2Cu3O7−δ0 v443 a

We report selective substitution of oxygen-18 and oxygen-16 isotopes into the inequivalent oxygen lattice sites in YBa2Cu3O7δ. The technique involves gas-phase diffusion and exploits the site dependence of diffusion rates. The CuO2-plane [O(2),O(3)] sites of YBa2Cu3O7δ can be filled with 18O while the apical [O(4)] and CuO-chain sites [O(1)] contain 16O (the opposite distribution can also be made). The site-selective isotope occupation has been confirmed by Raman spectroscopy. Our method will permit experiments to determine the contributions of the different oxygen sites to the isotope effect, in order to locate the pairing interaction within the unit cell.

1 aMorris, D., E.1 aMarkelz, A., G.1 aWei, J., Y. T.1 aHuitgren, C., T.1 aNickel, J., H.1 aHamilton, J., C.1 aMcCarty, K., F. uhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.44.955600501nas a2200181 4500008004100000020001400041245004400055210004400099260001000143300001400153490000700167100001900174700001900193700002000212700001900232700001900251856004900270 1988 eng d a0163-182900aSMALL OXYGEN ISOTOPE SHIFT IN YBA2CU3O70 aSMALL OXYGEN ISOTOPE SHIFT IN YBA2CU3O7 cApr 1 a5936-59390 v371 aMorris, D., E.1 aKuroda, R., M.1 aMarkelz, A., G.1 aNickel, J., H.1 aWei, J., Y. T. uhttps://markelz.physics.buffalo.edu/node/27900725nas a2200217 4500008004100000020001400041245015500055210006900210260001000279300001600289490000700305100001900312700001200331700001700343700002100360700001900381700002000400700001900420700001900439856004900458 1988 eng d a0163-182900aSPECIFIC-HEAT MEASUREMENTS ON SUPERCONDUCTING BI-CA-SR-CU AND TL-CA-BA-CU OXIDES - ABSENCE OF A LINEAR TERM IN THE SPECIFIC-HEAT OF BI-CA-SR-CU OXIDES0 aSPECIFICHEAT MEASUREMENTS ON SUPERCONDUCTING BICASRCU AND TLCABA cDec 1 a11942-119450 v381 aFisher, R., A.1 aKim, S.1 aLacy, S., E.1 aPhillips, N., E.1 aMorris, D., E.1 aMarkelz, A., G.1 aWei, J., Y. T.1 aGinley, D., S. uhttps://markelz.physics.buffalo.edu/node/277