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Spectroscopic imaging STM studies of broken electronic symmetries in underdoped cuprates |
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| Authors: | K Fujita A Mesaros MJ Lawler S Sachdev J Zaanen H Eisaki S Uchida E-A Kim JC Davis |
| Institution: | 1. LASSP, Department of Physics, Cornell University, Ithaca, NY 14853, USA;2. CMPMS Department, Brookhaven National Laboratory, Upton, NY 11973, USA;3. Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan;4. Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, The Netherlands;5. Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, NY 13902-6000, USA;6. Department of Physics, Harvard University, Boston, MA 02138, USA;g Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan;h School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, Scotland |
| Abstract: | We use spectroscopic imaging scanning tunneling microscopy (SI-STM) to visualize the spatial symmetries of the electronic states that occur at the pseudogap energy scale in underdoped cuprates. We find evidence for the local intra-unit-cell electronic nematicity—by which we mean the disordered breaking of C4v symmetry within each CuO2 unit cell 1]. We also find that the coexisting incommensurate (smectic) electronic modulations couple to the intra-unit-cell nematicity through their 2π topological defects 2]. |
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