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Heavy d-electron quasiparticle interference and real-space electronic structure of Sr3Ru2O7

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Lee, J., Allan, M. P., Wang, M. A., Farrell, J., Grigera, S. A., Baumberger, F., et al. (2009). Heavy d-electron quasiparticle interference and real-space electronic structure of Sr3Ru2O7. Nature Physics, 5(11), 800-804. doi:10.1038/NPHYS1397.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-F24F-3
The intriguing idea that strongly interacting electrons can generate spatially inhomogeneous electronic liquid-crystalline phases is over a decade old(1-5), but these systems still represent an unexplored frontier of condensed-matter physics. One reason is that visualization of the many-body quantum states generated by the strong interactions, and of the resulting electronic phases, has not been achieved. Soft condensed-matter physics was transformed by microscopies that enabled imaging of real-space structures and patterns. A candidate technique for obtaining equivalent data in the purely electronic systems is spectroscopic imaging scanning tunnelling microscopy (SI-STM). The core challenge is to detect the tenuous but 'heavy' momentum (k)-space components of the many-body electronic state simultaneously with its real-space constituents. Sr3Ru2O7 provides a particularly exciting opportunity to address these issues. It possesses a very strongly renormalized 'heavy' d-electron Fermi liquid(6,7) and exhibits a field-induced transition to an electronic liquid-crystalline phase(8,9). Finally, as a layered compound, it can be cleaved to present an excellent surface for SI-STM.