Simulation of Flux Lines with Columnar Pins: Bose Glass and Entangled Liquids

Prasenjit Sen; Nandini Trivedi; D. M. Ceperley

doi:10.1103/physrevlett.86.4092

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Simulation of Flux Lines with Columnar Pins: Bose Glass and Entangled Liquids

Prasenjit Sen·Nandini Trivedi·D. M. Ceperley

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Abstract

Using path integral Monte Carlo we simulate a 3D system of up to 1000 magnetic flux lines by mapping it onto a system of interacting bosons in (2+1)D. With increasing temperature we find a first order melting of flux lines from an ordered solid to an entangled liquid signalled by a finite entropy jump and sharp discontinuities in the defect density and the structure factor $S({\bf G})$ at the first reciprocal lattice vector. In the presence of a small number of strong columnar pins, we find that the crystal is transformed into a Bose glass phase with patches of crystalline order nucleated around the trapped vortices but with no overall positional or orientational order. This glassy phase melts into a defected entangled liquid through a continuous transition.

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Prasenjit Sen, Nandini Trivedi, D. M. Ceperley. 2000-08-28. Simulation of Flux Lines with Columnar Pins: Bose Glass and Entangled Liquids. https://doi.org/10.1103/physrevlett.86.4092

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