2026-09-19T12:25:34Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/46715 2023-07-11 col_2142_8859 col_2142_5131 com_2142_8858 com_2142_234 com_2142_5130

Leggett, Anthony J. Phillips, Philip W. Leggett, Anthony J. Greene, Laura H. Stack, John D. Pham, Minh T. 2014-01-16T18:00:04Z 2014-01-16T18:00:04Z 2013-12 2014-01-16T18:00:04Z 2013-12 The subject of this thesis is studying the resistivity along c-axis direction in cuprates, layered high-temperature superconducting materials as a function of temperature. A point-to-point tunneling model is built to describe the tunneling between two CuO2 planes including the in-plane Coulomb interaction. With a general assumption that the spectral function of the Coulomb uctuation is ohmic, the solution of the transmission rate in the model is obtained by mapping the Coulomb potential fluctuation to phonon coupling of the spin-boson model. From the result of the transmission rate, the c-axis resistivity is calculated in both gapless and gap cases as a function of the temperature and the strength of the Coulomb uctuation. The dimensionless parameter characterizing the strength of the Coulomb uctuation is calculated theoretically in the random-phase approximation (RPA) and in the Landau-Fermi liquid theory. The extensions of the calculation to include the Coulomb interaction between CuO2 planes are done in this thesis to get a better description of c-axis transport for double-layered cuprates and single-layered cuprates. It turns out the theoretical form of the c-axis resistivity ts quite well with experimental data in both the metallic (gapless) region and the metal-insulator crossover (pseudogap) region of the c-axis resistivity. The parameter in the tting is also compared with the solution in the RPA calculation. It shows that the RPA result of is reasonably good in gapless case but fails in gap case. An extension for the future work about a multi-channel tunneling model is discussed in the last part of the thesis. Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2013-09-30T17:59:04Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Pham_Minh.pdf: 1751495 bytes, checksum: e4ed01bb497f0dc315a2adb500d073c4 (MD5) Made available in DSpace on 2014-01-16T18:00:04Z (GMT). No. of bitstreams: 2 Minh_Pham.pdf: 1750157 bytes, checksum: e29a5975b783668c14b422ededcf8ba3 (MD5) license.txt: 4057 bytes, checksum: dbb08267699514007e191475044d4ab2 (MD5) http://hdl.handle.net/2142/46715 en Copyright 2013 Minh Tuan Pham cuprate c-axis resistivity Coulomb fluctuation point-to-point tunneling model random-phase approximation (RPA) tunneling The influence of coulomb potential fluctuation on c-axis tunneling in cuprates text Physics 1244 Physics 0240 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Physics -UIUC 10KS0240PHD