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Asymmetric magnetic interference patterns in 0-pi Josephson junctions
Daniel F. Agterberg, M. Sigrist
We examine the magnetic interference patterns of Josephson junctions with a region of 0- and of pi-phase shift. Such junctions have recently been realized as c-axis YBCO-Pb junctio…
Lightly Doped t-J Three-Leg Ladders - an Analog for the Underdoped Cuprates
T. M. Rice, Stephan Haas, Manfred Sigrist +1
The three-leg ladder has one odd-parity and two even-parity channels. At low doping these behave quite differently. Numerical calculations for a t-J model show that the initial pha…
Time Reversal Symmetry Breaking and Spontaneous Currents in s-Wave / Normal Metal / d-Wave Superconductor Sandwiches
Andrea Huck, Anne van Otterlo, Manfred Sigrist
We study the physical properties of an -wave -- normal metal -- -wave junction in terms of the Andreev bound states in the normal metal layer. The phase dependence of bound s…
Extended Gapless Regions in Disordered d_{x^2-y^2}-Wave Superconductors
Stephan Haas, A. V. Balatsky, Manfred Sigrist +1
A generalization of the Abrikosov-Gorkov equations for non-magnetic impurities in unconventional superconductors is proposed, including higher harmonics in the expansion of the mom…
Low-Temperature Scaling Regime of Random Ferromagnetic-Antiferromagnetic Spin Chains
Beat Frischmuth, Manfred Sigrist
Using the Continuous Time Quantum Monte Carlo Loop algorithm, we calculate the temperature dependence of the uniform susceptibility, and the specific heat of a spin-1/2 chain with…