Photoemission spectroscopy and the unusually robust one-dimensional physics of lithium purple bronze

• Published in: Journal of physics. Condensed matter Vol. 25; no. 1; p. 014007
• Main Authors: Dudy, L, Denlinger, J D, Allen, J W, Wang, F, He, J, Hitchcock, D, Sekiyama, A, Suga, S
• Format: Journal Article
• Language: English
• Published: England 09-01-2013
• Subjects: Computer Simulation; Lithium - chemistry; Models, Chemical; Models, Molecular; Photoelectron Spectroscopy - methods; Rheology - methods; Solutions - chemistry; Thermal Conductivity
• ISSN: 1361-648X
• DOI: 10.1088/0953-8984/25/1/014007

Temperature-dependent photoemission spectroscopy in Li(0.9)Mo(6)O(17) contributes to evidence for one-dimensional (1D) physics that is unusually robust. Three generic characteristics of the Luttinger liquid are observed: power law behavior of the k-integrated spectral function down to temperatures just above the superconducting transition, k-resolved lineshapes that show holon and spinon features, and quantum critical (QC) scaling in the lineshapes. Departures of the lineshapes and the scaling from expectations in the Tomonaga-Luttinger model can be partially described by a phenomenological momentum broadening that is presented and discussed. The possibility that some form of 1D physics obtains even down to the superconducting transition temperature is assessed.