Mesoscopic conductance fluctuations in YBa$_2$Cu$_3$O$_7-δ$ grain boundary Junction at low temperature TeX Export

@article{citeulike:3883173, abstract = {The magneto-conductance in YBCO grain boundary Josephson junctions, displays fluctuations at low temperatures of mesoscopic origin. The morphology of the junction suggests that transport occurs in narrow channels across the grain boundary line, with a large Thouless energy. Nevertheless the measured fluctuation amplitude decreases quite slowly when increasing the voltage up to values about twenty times the Thouless energy, of the order of the nominal superconducting gap. Our findings show the coexistence of supercurrent and quasiparticle current in the junction conduction even at high nonequilibrium conditions. Model calculations confirm the reduced role of quasiparticle relaxation at temperatures up to 3 Kelvin.}, archivePrefix = {arXiv}, author = {Tagliacozzo, A. and Tafuri, F. and Gambale, E. and Jouault, B. and Born, D. and Lucignano, P. and Stornaiuolo, D. and Lombardi, F. and Barone, A. and Altshuler, B. L.}, citeulike-article-id = {3883173}, citeulike-linkout-0 = {http://arxiv.org/abs/0901.1550}, citeulike-linkout-1 = {http://arxiv.org/pdf/0901.1550}, day = {12}, eprint = {0901.1550}, keywords = {cuprates, disorder, edges}, month = {Jan}, posted-at = {2009-01-13 18:58:22}, priority = {2}, title = {Mesoscopic conductance fluctuations in YBa\$\_2\$Cu\$\_3\$O\$\_{7-\delta}\$ grain boundary Junction at low temperature}, url = {http://arxiv.org/abs/0901.1550}, year = {2009} }

TY - JOUR ID - citeulike:3883173 L3 - citeulike-article-id:3883173 N2 - The magneto-conductance in YBCO grain boundary Josephson junctions, displays fluctuations at low temperatures of mesoscopic origin. The morphology of the junction suggests that transport occurs in narrow channels across the grain boundary line, with a large Thouless energy. Nevertheless the measured fluctuation amplitude decreases quite slowly when increasing the voltage up to values about twenty times the Thouless energy, of the order of the nominal superconducting gap. Our findings show the coexistence of supercurrent and quasiparticle current in the junction conduction even at high nonequilibrium conditions. Model calculations confirm the reduced role of quasiparticle relaxation at temperatures up to 3 Kelvin. TI - Mesoscopic conductance fluctuations in YBa$_2$Cu$_3$O$_{7-\delta}$ grain boundary Junction at low temperature KW - cuprates KW - disorder KW - edges AU - Tagliacozzo, A AU - Tafuri, F AU - Gambale, E AU - Jouault, B AU - Born, D AU - Lucignano, P AU - Stornaiuolo, D AU - Lombardi, F AU - Barone, A AU - Altshuler, BL PY - 2009/Jan/12/ UR - http://arxiv.org/abs/0901.1550 ER -