In this talk, I will focus on the question, "What causes dissipation in
a low-dimensional, disordered superconductor when a magnetic field (B)
is applied?". Experimental results from our recent work on 2D
thin-films [1-3] and 1D nano-fabricated wires [4] of superconducting,
amorphous indium oxide will be presented. In particular, in 2D, I will
argue that the insulator that terminates the superconducting state at
high B is a novel, collective state [2]. In 1D, we will present results
that show an intriguing SQUID-like resistance behavior even in simply
connected wires [4].
References:
1. Phys. Rev. Lett. 92, 107005 (2004).
2. Phys. Rev. Lett. 94, 017003 (2005).
3. cond-mat/0410724.
4. Phys. Rev. Lett. 95, 116805 (2005).