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Trapped magnetic flux is known to degrade the quality factor of superconducting cavities by increasing the surface losses ascribed to the residual resistance. In Nb3Sn cavities, which consist of a thin layer of Nb3Sn coated on a bulk niobium substrate, the bimetallic interface results in a thermal current being generated in the presence of a thermalâ€¦ (More)

- Danilo B. Liarte, Matthew Bierbaum, Ricardo A. Mosna, Randall D. Kamien, James P. Sethna
- Physical review letters
- 2016

Smectic liquid crystals are remarkable, beautiful examples of materials microstructure, with ordered patterns of geometrically perfect ellipses and hyperbolas. The solution of the complex problem of filling three-dimensional space with domains of focal conics under constraining boundary conditions yields a set of strict rules, which are similar to theâ€¦ (More)

- Dianne L. Hall, Paul Cueva, +5 authors James P. Sethna
- 2017

The superconductor Nb3Sn is known to have a superheating field, Hsh, of approximately 400 mT. This critical field represents the ultimate achievable gradient in a superconducting cavity, and is equivalent to an accelerating gradient of 90 MV/m in an ILC single-cell cavity for this value of Hsh. However, the currently best performing Nb3Sn single-cellâ€¦ (More)

- James P. Sethna, Matthew Bierbaum, +12 authors Stefano Zapperi
- 2016

We give a birdâ€™s-eye view of the plastic deformation of crystals aimed at the statistical physics community, and a broad introduction into the statistical theories of forced rigid systems aimed at the plasticity community. Memory effects in magnets, spin glasses, charge density waves, and dilute colloidal suspensions are discussed in relation to the onsetâ€¦ (More)

- Eduardo do Carmo, Danilo B. Liarte, Silvio R. Salinas
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2010

We consider a simple Maier-Saupe statistical model with the inclusion of disorder degrees of freedom to mimic the phase diagram of a mixture of rodlike and disklike molecules. A quenched distribution of shapes leads to a phase diagram with two uniaxial and a biaxial nematic structure. A thermalized distribution, however, which is more adequate to liquidâ€¦ (More)

Abstract. We introduce a Sherrington-Kirkpatrick spin-glass model with the addition of elastic degrees of freedom. The problem is formulated in terms of an effective four-spin Hamiltonian in the pressure ensemble, which can be treated by the replica method. In the replica-symmetric approximation, we analyze the pressuretemperature phase diagram, and obtainâ€¦ (More)

We investigate the effects of material anisotropy on the superheating field of layered superconductors. We provide an intuitive argument both for the existence of a superheating field, and its dependence on anisotropy, for Îº = Î»/Î¾ (the ratio of magnetic to superconducting healing lengths) both large and small. On the one hand, the combination of ourâ€¦ (More)

- Danilo B. Liarte, Olaf Stenull, Xiaoming Mao, Tom C. Lubensky
- Journal of physics. Condensed matter : anâ€¦
- 2016

We use numerical simulations and an effective-medium theory to study the rigidity percolation transition of the honeycomb and diamond lattices when weak bond-bending forces are included. We use a rotationally invariant bond-bending potential, which, in contrast to the Keating potential, does not involve any stretching. As a result, the bulk modulus does notâ€¦ (More)

- Danilo B. Liarte, Silvio R. Salinas, Carlos S. O. Yokoi
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2011

We introduce a simple mean-field lattice model to describe the behavior of nematic elastomers. This model combines the Maier-Saupe-Zwanzig approach to liquid crystals and an extension to lattice systems of the Warner-Terentjev theory of elasticity, with the addition of quenched random fields. We use standard techniques of statistical mechanics to obtainâ€¦ (More)

- Danilo B. Liarte
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2013

We propose a lattice statistical model to investigate the phase diagrams and the soft responses of nematic liquid-crystal elastomers. Using suitably scaled infinite-range interactions, we obtain exact self-consistent equations for the tensor components of the nematic order parameter in terms of temperature, the distortion and stress tensors, and the initialâ€¦ (More)