Geometric origin of low-frequency excess density of vibrational modes in: weakly-connected amorphous solids

Authors: M. Wyart, S. Nagel, T. Witten http://arXiv.org/cond-mat/0409687 Recommended and a Commentary by Jean-Philippe Bouchaud, ENS, Paris.  | View Commentary (pdf) | (JCCM_Mar05_01)

The Statistical Mechanics of Travelling Salesman type Problems

Authors: David S. Dean, David Lancaster, and Satya N. Majumdar http://arXiv.org/cond-mat/0411111 Recommended and Commentary by Deepak Dhar, Tata Institute of Fundamental Research, Mumbai. | View Commentary (pdf) | (JCCM_Mar05_02)

Hall effect indicates destruction of large Fermi surface at a heavy-fermion quantum critical point

Authors: S. Paschen, T. Luhmann, S. Wirth, P. Gegenwart, O. Trovarelli, C. Geibel, F. Steglich, P. Coleman, and Qimiao Si http://ArXiv.org/cond-mat/0411074 Recommended and Commentary by Zachary Fisk, University of California, Davis. | View Commentary (pdf) | (JCCM_Mar05_03)