TY - JOUR
T1 - Scanning tunneling spectroscopy characterization of the pseudogap and the x= 1 8 anomaly in La2-x Srx Cu O4 thin films
AU - Yuli, Ofer
AU - Asulin, Itay
AU - Millo, Oded
AU - Koren, Gad
PY - 2007/5/22
Y1 - 2007/5/22
N2 - Using scanning tunneling spectroscopy we examined the local density of states of thin c -axis La2-x Srx Cu O4 films, over wide doping and temperature ranges. We found that the pseudogap exists only at doping levels lower than optimal. For x=0.12, close to the "anomalous" x= 1 8 doping level, a zero-bias conductance peak was the dominant spectral feature, instead of the excepted V-shaped (c -axis tunneling) gap structure. We have established that this surprising effect cannot be explained by tunneling into (110) facets. Possible origins for this unique behavior are discussed.
AB - Using scanning tunneling spectroscopy we examined the local density of states of thin c -axis La2-x Srx Cu O4 films, over wide doping and temperature ranges. We found that the pseudogap exists only at doping levels lower than optimal. For x=0.12, close to the "anomalous" x= 1 8 doping level, a zero-bias conductance peak was the dominant spectral feature, instead of the excepted V-shaped (c -axis tunneling) gap structure. We have established that this surprising effect cannot be explained by tunneling into (110) facets. Possible origins for this unique behavior are discussed.
UR - http://www.scopus.com/inward/record.url?scp=34347401473&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.75.184521
DO - 10.1103/PhysRevB.75.184521
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AN - SCOPUS:34347401473
SN - 1098-0121
VL - 75
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 184521
ER -