Abstract
We study theoretically the electron–phonon interaction in Na x CoO2. For the A 1g and E 1g phonon modes found in Raman experiments, we calculate the matrix elements of the electron–phonon interaction. Analyzing the feedback effect of the conduction electrons on the phonon frequency ω, we investigate the doping dependence of these two phonon modes. Due to the momentum dependence of the electron–phonon interaction, we find the strongest renormalization of the E 1g mode around the Brillouin zone boundary which should be observed in the neutron scattering. At the same time, the A 1g mode shows the strongest coupling to the conducting electrons around the Γ point and reveals its doping dependence in the Raman experiments. Our results shed light on the possible importance of the electron–phonon interaction in the lamellar sodium cobaltates.
Article PDF
Similar content being viewed by others
References
Takada, K., Sakurai, H., Takayama-Muromachi, E., Izumi, F., Dilanian, R.A., Sasaki, T.: Nature 422, 53 (2003)
Foo, M.L., Wang, Y., Watauchi, S., Zandbergen, H.W., He, T., Cava, R.J., Ong, N.P.: Phys. Rev. Lett. 92, 247001 (2004)
Singh, D.J.: Phys. Rev. B 61, 13397 (2000)
Hasan, M.Z., Chuang, Y.-D., Qian, D., Li, Y.W., Kong, Y., Kuprin, A., Fedorov, A.V., Kimmerling, R., Rotenberg, E., Rossnagel, K., Hussain, Z., Koh, H., Rogado, N.S., Foo, M.L., Cava, R.J.: Phys. Rev. Lett. 92, 246402 (2004)
Yang, H.-B., Wang, S.-C., Sekharan, A.K.P., Matsui, H., Souma, S., Sato, T., Takahashi, T., Takeuchi, T., Campuzano, J.C., Jin, R., Sales, B.C., Mandrus, D., Wang, Z., Ding, H.: Phys. Rev. Lett. 92, 246403 (2004)
Korshunov, M.M., Eremin, I., Shorikov, A., Anisimov, V.I., Renner, M., Brenig, W.: Phys. Rev. B 75, 094511 (2007)
Zhou, S., Gao, M., Ding, H., Lee, P.A., Wang, Z.: Phys. Rev. Lett. 94, 206401 (2005)
Singh, D.J., Kasinathan, D.: Phys. Rev. Lett. 97, 016404 (2006)
Marianetti, C.A., Haule, K., Parcollet, O.: Phys. Rev. Lett. 99, 246404 (2007)
Pillay, D., Johannes, M.D., Mazin, I.I., Andersen, O.K.: arXiv:0804.3768 (unpublished)
Foussats, A., Greco, A., Bejas, M., Muramatsu, A.: Phys. Rev. B 72, 020504(R) (2005)
Bejas, M., Greco, A., Foussats, A.: Phys. Rev. B 75, 033101 (2007)
Donkov, A.A., Korshunov, M., Eremin, I., Lemmens, P., Gnezdilov, V., Chou, F.C., Lin, C.T.: Phys. Rev. B 77, 100504(R) (2008)
Nazarenko, A., Dagotto, E.: Phys. Rev. B 53, 2987(R) (1996)
Ovchinnikov, S.G., Schneider, E.I.: Z. Eksp. Teor. Fiz. 128, 974 (2005) (JETP 101, 844 (2005))
Li, Z., Yang, J., Hou, J.G., Zhu, Q.: Phys. Rev. B 70, 144518 (2004)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Open Access This is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
About this article
Cite this article
Donkov, A., Eremin, I., Knolle, J. et al. Electron–Phonon Interaction and Phonon Renormalization in the Lamellar Cobaltate Na x CoO2 . J Supercond Nov Magn 22, 37–40 (2009). https://doi.org/10.1007/s10948-008-0372-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10948-008-0372-6