%0 Journal Article %1 paone2021alloptical %A Paone, D. %A Pinto, D. %A Kim, G. %A Feng, L. %A Kim, M. J. %A Stohr, R. %A Singha, A. %A Kaiser, S. %A Logvenov, G. %A Keimer, B. %A Wrachtrup, J. %A Kern, K. %B Journal of Applied Physics %D 2021 %K t-c %R 10.1063/5.0037414 %T All-optical and microwave-free detection of Meissner screening using nitrogen-vacancy centers in diamond %U https://aip.scitation.org/doi/10.1063/5.0037414 %V 129 %X Microscopic studies on thin film superconductors play an important role for probing non-equilibrium phase transitions and revealing dynamics at the nanoscale. However, magnetic sensors with nanometer scale spatial and picosecond temporal resolution are essential for exploring these. Here, we present an all-optical, microwave-free method that utilizes the negatively charged nitrogen-vacancy (NV) center in diamond as a non-invasive quantum sensor and enables the spatial detection of the Meissner state in a superconducting thin film. We place an NV implanted diamond membrane on a 20 nm thick superconducting La2-xSrxCuO4 (LSCO) thin film with T-c of 34 K. The strong B-field dependence of the NV photoluminescence allows us to investigate the Meissner screening in LSCO under an externally applied magnetic field of 4.2mT in a non-resonant manner. The magnetic field profile along the LSCO thin film can be reproduced using Brandt's analytical model, revealing a critical current density j(c) of 1.4 x 10(8) A/cm(2). Our work can be potentially extended further with a combination of optical pump probe spectroscopy for the local detection of time-resolved dynamical phenomena in nanomagnetic materials. %Z Pv2krTimes Cited:0Cited References Count:39

@article{paone2021alloptical, abstract = {Microscopic studies on thin film superconductors play an important role for probing non-equilibrium phase transitions and revealing dynamics at the nanoscale. However, magnetic sensors with nanometer scale spatial and picosecond temporal resolution are essential for exploring these. Here, we present an all-optical, microwave-free method that utilizes the negatively charged nitrogen-vacancy (NV) center in diamond as a non-invasive quantum sensor and enables the spatial detection of the Meissner state in a superconducting thin film. We place an NV implanted diamond membrane on a 20 nm thick superconducting La2-xSrxCuO4 (LSCO) thin film with T-c of 34 K. The strong B-field dependence of the NV photoluminescence allows us to investigate the Meissner screening in LSCO under an externally applied magnetic field of 4.2mT in a non-resonant manner. The magnetic field profile along the LSCO thin film can be reproduced using Brandt's analytical model, revealing a critical current density j(c) of 1.4 x 10(8) A/cm(2). Our work can be potentially extended further with a combination of optical pump probe spectroscopy for the local detection of time-resolved dynamical phenomena in nanomagnetic materials. }, added-at = {2021-06-21T10:23:22.000+0200}, annote = {Pv2krTimes Cited:0Cited References Count:39}, author = {Paone, D. and Pinto, D. and Kim, G. and Feng, L. and Kim, M. J. and Stohr, R. and Singha, A. and Kaiser, S. and Logvenov, G. and Keimer, B. and Wrachtrup, J. and Kern, K.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/280581a0dd3761ec495a63cffc41caed5/shirschmann}, booktitle = {Journal of Applied Physics}, doi = {10.1063/5.0037414}, interhash = {bf598cd1e04c237c2836d9733befdced}, intrahash = {80581a0dd3761ec495a63cffc41caed5}, issn = {0021-8979}, keywords = {t-c}, series = 2, timestamp = {2021-06-21T08:23:22.000+0200}, title = {All-optical and microwave-free detection of Meissner screening using nitrogen-vacancy centers in diamond}, url = {https://aip.scitation.org/doi/10.1063/5.0037414}, volume = 129, year = 2021 }