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http://hdl.handle.net/1942/11120
Title: | Magnetic field-driven superconductor-insulator transition in boron-doped nanocrystalline chemical vapor deposition diamond | Authors: | Zhang, Gufei Vanacken, J. Van de Vondel, J. Decelle, W. Fritzsche, J. Moshchalkov, V. V. Willems, B.L. JANSSENS, Stoffel HAENEN, Ken WAGNER, Patrick |
Issue Date: | 2010 | Publisher: | AMER INST PHYSICS | Source: | JOURNAL OF APPLIED PHYSICS, 108 (1) | Abstract: | The systematics of the suppression of superconductivity with increasing magnetic field in boron-doped nanocrystalline chemical vapor deposition diamond is studied in a broad temperature range. At the temperature of T-S0 which is above the critical temperature, a plateau is observed in the resistivity versus temperature curve rho(T) taken at zero magnetic field. When a magnetic field of B=B-SN (N=1,2, ... ,5) is applied, the plateau moves to low temperature with the thermoresistivity maximum located at T-SN (N=1,2, ... ,5). The rho(B) curves, measured at different temperatures around T-SN, intersect in the rho-B plane at the field of B=B-SN. By tuning B-SN from 0 to 5 T, a series of plateaus in the rho-T plane and the corresponding intersections in the rho-B plane are observed. The intersections quadratically chain up in the rho-B plane, separating the superconducting from the insulating region. The thermoresistivity maxima exponentially group up in the rho-T plane, thus defining a phase fluctuation zone. The phase boundary, composed of the intersections and separating the superconducting states from the insulating state, is shown to be a generic consequence of granularity. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3437653] | Notes: | [Zhang, Gufei; Vanacken, J.; Van de Vondel, J.; Decelle, W.; Fritzsche, J.; Moshchalkov, V. V.] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium. [Willems, B. L.] Univ Nacl Mayor San Marcos, Fac Ciencias Fis, Lima 14, Peru. [Janssens, S. D.; Haenen, K.; Wagner, P.] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Haenen, K.; Wagner, P.] IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium. gufei.zhang@fys.kuleuven.be | Document URI: | http://hdl.handle.net/1942/11120 | ISSN: | 0021-8979 | e-ISSN: | 1089-7550 | DOI: | 10.1063/1.3437653 | ISI #: | 000280000400056 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2011 |
Appears in Collections: | Research publications |
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