Klaus H. Kiefer

Quantum Criticality in an Ising Chain: Experimental Evidence for Emergent E ₈ Symmetry

R. Coldea, D. M. Tennant, Elisa M. Wheeler et al. · Science · 2010 · 717 citations · Full text

Natural Sciences, Physics, Condensed Matter Physics +15

Dirac Strings and Magnetic Monopoles in the Spin Ice Dy ₂ Ti ₂ O ₇

D. J. P. Morris, D. M. Tennant, S. A. Grigera et al. · Science · 2009 · 605 citations · Full text

Natural Sciences, Physics, Condensed Matter Physics +13

Performance ratio revisited: is PR > 90% realistic?

N.H. Reich, B. Mueller, Alfons Armbruster et al. · Progress in Photovoltaics Research and Applications · 2012 · 243 citations · Full text

Engineering, Computer Systems, Performance Assessment +16

Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material

Christian Rüegg, Klaus H. Kiefer, B. Thielemann et al. · Physical Review Letters · 2008 · 173 citations · Full text

Natural Sciences, Physics, Condensed Matter Physics +16

Power characteristics of PV ensembles: experiences from the combined power production of 100 grid connected PV systems distributed over the area of Germany

Edo Wiemken, Hans-Georg Beyer, Wolfgang Heydenreich et al. · Solar Energy · 2001 · 167 citations

Engineering, Electrical Engineering, Energy Systems +16