Disordering of the vortex lattice through successive destruction of positional and orientational order in a weakly pinned Co0.0075NbSe2 single crystal

Chandra Ganguli, Somesh ; Singh, Harkirat ; Saraswat, Garima ; Ganguly, Rini ; Bagwe, Vivas ; Shirage, Parasharam ; Thamizhavel, Arumugam ; Raychaudhuri, Pratap (2015) Disordering of the vortex lattice through successive destruction of positional and orientational order in a weakly pinned Co0.0075NbSe2 single crystal Scientific Reports, 5 . Article ID 10613. ISSN 2045-2322

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Official URL: https://www.nature.com/articles/srep10613

Related URL: http://dx.doi.org/10.1038/srep10613

Abstract

The vortex lattice in a Type II superconductor provides a versatile model system to investigate the order-disorder transition in a periodic medium in the presence of random pinning. Here, using scanning tunnelling spectroscopy in a weakly pinned Co0.0075NbSe2 single crystal, we show that the vortex lattice in a 3-dimensional superconductor disorders through successive destruction of positional and orientational order, as the magnetic field is increased across the peak effect. At the onset of the peak effect, the equilibrium quasi-long range ordered state transforms into an orientational glass through the proliferation of dislocations. At a higher field, the dislocations dissociate into isolated disclination giving rise to an amorphous vortex glass. We also show the existence of a variety of additional non-equilibrium metastable states, which can be accessed through different thermomagnetic cycling.

Item Type:Article
Source:Copyright of this article belongs to Nature Publishing Group.
ID Code:105136
Deposited On:25 Dec 2017 11:42
Last Modified:25 Dec 2017 11:42

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