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http://dspace.mediu.edu.my:8181/xmlui/handle/123456789/8282| Title: | Phase diagram of cuprate superconductors at ultrahigh magnetic fields |
| Issue Date: | 1-Jun-2013 |
| Publisher: | Sociedade Brasileira de Física |
| Description: | We have investigated the field-temperature (H - T) diagram of the superconducting and pseudogapped states of Bi2Sr2CaCu2O8+y over a wide range of hole doping (0:10 < p < 0:225). Using interlayer tunneling transport in magnetic fields up to 60 T to probe the density-of states (DOS) depletion at low excitation energies we mapped the pseudogap closing field Hpg. We found that Hpg and the pseudogap onset temperature T* are related via a Zeeman relation gmB Hpg ~ kB T*, irrespective of whether the magnetic field is applied along the c-axis or parallel to CuO2 planes. In contrast to large anisotropy of the superconducting state, the field anisotropy of Hpg is due solely to the g-factor. Our findings indicate that the pseudogap is of singlet-spin origin, consistent with models based on doped Mott insulator. |
| URI: | http://koha.mediu.edu.my:8181/jspui/handle/123456789/8282 |
| Other Identifiers: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332003000400006 http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2003&volume=33&issue=4&spage=671 |
| Appears in Collections: | Physics and Astronomy |
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