Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering
Abstract
We report the observation of multiple phonon satellite features in ultrathin superlattices of the form nSrIrO_{3}/mSrTiO_{3} using resonant inelastic x-ray scattering (RIXS). As the values of n and m vary, the energy loss spectra show a systematic evolution in the relative intensity of the phonon satellites. Using a closed-form solution for the RIXS cross section, we extract the variation in the electron-phonon coupling strength as a function of n and m. Combined with the negligible carrier doping into the SrTiO_{3} layers, these results indicate that the tuning of the electron-phonon coupling can be effectively decoupled from doping. This work both showcases a feasible method to extract the electron-phonon coupling in superlattices and unveils a potential route for tuning this coupling, which is often associated with superconductivity in SrTiO_{3}-based systems.
- Authors:
-
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- Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Condensed Matter Physics and Materials Science
- Univ. of Tennessee, Knoxville, TN (United States). Department of Physics and Astronomy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Department of Condensed Matter Physics and Materials Science
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source
- Paul Scherrer Institut (Switzerland). Research Department Synchrotron Radiation and Nanotechnology
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Computational Science and Engineering Division
- Univ. of Tennessee, Knoxville, TN (United States). Department of Physics and Astronomy and Joint Institute of Advanced Materials
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC). Early Career Award and National Energy Research Scientific Computing Center (NERSC); Swiss National Science Foundation (SNSF); Paul Scherrer Institut; University of Tennessee; U.S. Department of Defense (DOD) - Defense Advanced Research Projects Agency (DARPA)
- OSTI Identifier:
- 1478476
- Alternate Identifier(s):
- OSTI ID: 1484975; OSTI ID: 1486946; OSTI ID: 1493884; OSTI ID: 1631599
- Report Number(s):
- BNL-209316-2018-JAAM
Journal ID: ISSN 0031-9007
- Grant/Contract Number:
- SC0012704; AC02-05CH11231; AC02-06CH11357; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 23; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Meyers, Derek, Nakatsukasa, Ken, Mu, Sai, Hao, Lin, Yang, Junyi, Cao, Yue, Fabbris, G., Miao, Hu, Pelliciari, J., McNally, D., Dantz, M., Paris, E., Karapetrova, E., Choi, Yongseong, Haskel, D., Shafer, P., Arenholz, E., Schmitt, Thorsten, Berlijn, Tom, Johnston, S., Liu, Jian, and Dean, Mark P. M. Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering. United States: N. p., 2018.
Web. doi:10.1103/PhysRevLett.121.236802.
Meyers, Derek, Nakatsukasa, Ken, Mu, Sai, Hao, Lin, Yang, Junyi, Cao, Yue, Fabbris, G., Miao, Hu, Pelliciari, J., McNally, D., Dantz, M., Paris, E., Karapetrova, E., Choi, Yongseong, Haskel, D., Shafer, P., Arenholz, E., Schmitt, Thorsten, Berlijn, Tom, Johnston, S., Liu, Jian, & Dean, Mark P. M. Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering. United States. https://doi.org/10.1103/PhysRevLett.121.236802
Meyers, Derek, Nakatsukasa, Ken, Mu, Sai, Hao, Lin, Yang, Junyi, Cao, Yue, Fabbris, G., Miao, Hu, Pelliciari, J., McNally, D., Dantz, M., Paris, E., Karapetrova, E., Choi, Yongseong, Haskel, D., Shafer, P., Arenholz, E., Schmitt, Thorsten, Berlijn, Tom, Johnston, S., Liu, Jian, and Dean, Mark P. M. Fri .
"Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering". United States. https://doi.org/10.1103/PhysRevLett.121.236802. https://www.osti.gov/servlets/purl/1478476.
@article{osti_1478476,
title = {Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering},
author = {Meyers, Derek and Nakatsukasa, Ken and Mu, Sai and Hao, Lin and Yang, Junyi and Cao, Yue and Fabbris, G. and Miao, Hu and Pelliciari, J. and McNally, D. and Dantz, M. and Paris, E. and Karapetrova, E. and Choi, Yongseong and Haskel, D. and Shafer, P. and Arenholz, E. and Schmitt, Thorsten and Berlijn, Tom and Johnston, S. and Liu, Jian and Dean, Mark P. M.},
abstractNote = {We report the observation of multiple phonon satellite features in ultrathin superlattices of the form nSrIrO_{3}/mSrTiO_{3} using resonant inelastic x-ray scattering (RIXS). As the values of n and m vary, the energy loss spectra show a systematic evolution in the relative intensity of the phonon satellites. Using a closed-form solution for the RIXS cross section, we extract the variation in the electron-phonon coupling strength as a function of n and m. Combined with the negligible carrier doping into the SrTiO_{3} layers, these results indicate that the tuning of the electron-phonon coupling can be effectively decoupled from doping. This work both showcases a feasible method to extract the electron-phonon coupling in superlattices and unveils a potential route for tuning this coupling, which is often associated with superconductivity in SrTiO_{3}-based systems.},
doi = {10.1103/PhysRevLett.121.236802},
journal = {Physical Review Letters},
number = 23,
volume = 121,
place = {United States},
year = {Fri Dec 07 00:00:00 EST 2018},
month = {Fri Dec 07 00:00:00 EST 2018}
}
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