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Please use this identifier to cite or link to this item: 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.
WAGNER, Patrick
Issue Date: 2010
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
URI: http://hdl.handle.net/1942/11120
DOI: 10.1063/1.3437653
ISI #: 000280000400056
ISSN: 0021-8979
Category: A1
Type: Journal Contribution
Validation: ecoom, 2011
Appears in Collections: Research publications

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