Pseudogap of metallic layered nickelate R(2-x)Sr(x)NiO4 (R = Nd, Eu) crystals measured using angle-resolved photoemission spectroscopy.
Physical review letters 106:2 (2011) 027001
Abstract:
We have investigated charge dynamics and electronic structures for single crystals of metallic layered nickelates, R(2-x)Sr(x)NiO4 (R = Nd, Eu), isostructural to La(2-x)Sr(x)CuO4. Angle-resolved photoemission spectroscopy on the barely metallic Eu(0.9)Sr(1.1)NiO4 (R = Eu, x = 1.1) has revealed a large hole surface of x2-y2 character with a high-energy pseudogap of the same symmetry and comparable magnitude with those of underdoped (x<0.1) cuprates, although the antiferromagnetic interactions are 1 order of magnitude smaller. This finding strongly indicates that the momentum-dependent pseudogap feature in the layered nickelate arises from the real-space charge correlation.A Wilson line picture of the Levin-Wen partition functions
NEW JOURNAL OF PHYSICS 13 (2011) ARTN 065001
Active Polymer Translocation through Flickering Pores
PHYSICAL REVIEW LETTERS 107:23 (2011) ARTN 238102
Boundary effects on the local density of states of one-dimensional Mott insulators and charge density wave states
PHYSICAL REVIEW B 83:3 (2011) ARTN 035111
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MOLECULAR PHYSICS 109:7-10 (2011) PII 936987418