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arXiv · cond-mat/9612093

Weakly Pinned Bose Glass vs. Mott Insulator Phase in Superconductors

Carsten Wengel·Uwe Claus Täuber
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Abstract

We study the properties of the Bose glass phase of localized flux lines in irradiated superconductors near the matching field $B_Φ$. Repulsive vortex interactions destroy the Mott insulator phase predicted to occur at $B=B_Φ$. For ratios of the penetration depth to average defect distance $λ/ d \leq 1$ remnants of the Mott insulator singularities remain visible in the magnetization, the bulk modulus, and the magnetization relaxation, as B is varied near $B_Φ$. For $λ\geq d$, the ensuing weakly pinned Bose glass is characterized by a soft Coulomb gap in the distribution of pinning energies.

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Carsten Wengel, Uwe Claus Täuber. 1996-12-10. Weakly Pinned Bose Glass vs. Mott Insulator Phase in Superconductors. https://doi.org/10.1103/physrevlett.78.4845

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