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Search for Competing Order-parameters in Cuprates using FT-STS

Superconductors: other phases?. Theory: many proposed phases. Theory: many proposed phases. High Tc cuprates. Conventional, Low Tc. 0.5 nS. D-density wave (DDW). 2 pA. Chakravarty, Laughlin, et al., PRB 63 , 094503. STRIPES. Varma phase. 0 1000Å.

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Search for Competing Order-parameters in Cuprates using FT-STS

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  1. Superconductors: other phases? Theory: many proposed phases... Theory: many proposed phases... High Tc cuprates Conventional, Low Tc 0.5 nS D-density wave (DDW) 2 pA Chakravarty, Laughlin, et al., PRB63, 094503 STRIPES Varma phase 0 1000Å 0 500Å S. White, Zaanen, Kivelson, Emery, etc. ~(1/4,0) Coexisting SDW/CDW Varma, PRB61, R3804 AF 560 Å Demler, Sachdev, Zhang, PRL 87, 067202 SC Exponential Decay of Core State 1 2 BSCCO H. Kammmerlingh-Onnes, Commun. Phys. Lab. 12, 120 (1911) Orenstein & Millis, Science 288, 5465 Staggered Flux Phase x y 0 nS y y y y x x x x 0 pA Kishine, Lee & Wen, PRL 86, 5365 So many proposed phases they won’t fit in this small space... Normalized dI/dV superconducting 1 dI/dV [nS] 0.1 Fermi liquid Fractionalized Nodal Liquid: Superconductivity without pairing? 560 Å 560 Å 560 Å 560 Å 0 15 30 45 60 75 QED3 0 1200 Å -200 -100 0 100 200 Distance from core [Å] SO(5) theory Franz, et al., condmat/0203219 V sample [mV] Senthil & Fisher, PRB 62, 7864 (2001) S.C. Zhang, Science275, 1089 Search for Competing Order-parameters in Cuprates using FT-STS J. E. Hoffman, K. McElroy, E.W. Hudson, H Eisaki, S. Uchida & J. C. Seamus Davis dI/dV spectra on Bi2Sr2CaCu2O8+xsurface in B=7 Tesla Background: Common Phenomenology of Vortex Cores in HTSC 7 meV LDOS • I. Maggio-Aprile et al., Phys. Rev. Lett. 75, 2754 (1995) 30 nm Pan,PRL85, 1536 (2000) • S. H. Pan et al.,Phys. Rev. Lett. 85, 1536 (2000) Topographies Reproducibility of vortex data E = 12 meV B = 0 T B = 5 T B = 0 T B = 5 T 0.5% Ni-doped BSCCO 0.6% Zn-doped BSCCO 1.1 Å x y 0 Å Raw data: 7 meV LDOS 560 Å x 560 Å Raw data: 8 meV LDOS 565 Å x 565 Å Vortex-induced LDOS (5 Tesla) Fourier Transform of Vortex LDOS map Data: Schematic: supermodulation vortex induced LDOS Bi and Cu atoms Science 266, 455 (2002) Science 266, 455 (2002) Coexisting SDW/CDW ? Research Support:

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