PT Journal AU Golubev, DS Kalenkov, MS Zaikin, AD TI Crossed Andreev Reflection and Charge Imbalance in Diffusive Normal-Superconducting-Normal Structures SO Physical review letters PY 2009 BP Art.Nr. EP 067006 VL 103 DI 10.1103/PhysRevLett.103.067006 LA english ER