[en] By means of the ionic liquid gating technique (ILG), we have successfully tuned the critical transition temperatures (Tc) of superconducting FeSe and La1.9Ce0.1CuO4 (LCCO) films, whose thicknesses largely exceed the penetration depth of electrostatic fields. The magnetic responses of gated samples were measured in-situ using a homemade two-coil mutual inductance device. Through the analysis of the imaginary part of the induced pick-up coil voltage, we conclude that the gating process influences the entire film thickness rather than just a few layers near the sample surface. This bulk effect suggests that the electrochemical effect plays a central role in our experiments. These finding will shed new light on the mechanisms of ILG in superconducting films.
Disciplines :
Physics
Author, co-author :
Qin, Mingyang; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Zhang, Ruozhou; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Lin, Zefeng; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Feng, Zhongpei; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Wei, Xinjian; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Blanco Alvarez, Sylvain ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Dong, Chao; Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina
Silhanek, Alejandro ; Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
Zhu, Beiyi; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Yuan, Jie; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Qin, Qing; Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina
Jin, Kui; Beijing National Laboratory for Condensed Matter Physics, Institute of PhysicsChinese Academy of SciencesBeijingChina
Language :
English
Title :
In situ Magnetic Measurements of Ionic-Liquid-Gated Superconducting Films
Yuan, H., Shimotani, H., Tsukazaki, A., Ohtomo, A., Kawasaki, M., Iwasa, Y.: High-density carrier accumulation in ZnO field-effect transistors gated by electric double layers of ionic liquids. Adv. Funct. Mater. 19, 1046–1053 (2009)
Leng, X., Garcia-Barriocanal, J., Bose, S., Lee, Y., Goldman, A.M.: Electrostatic control of the evolution from a superconducting phase to an insulating phase in ultrathin YBa2Cu3O7-x films. Phys. Rev. Lett. 107, 027001 (2011)
Lu, T.M., Zheliuk, O., Leermakers, I., Yuan, N.F.Q., Zeitler, U., Law, K.T., Ye, J.T.: Evidence for two-dimensional Ising superconductivity in gated MoS2. Science. 350, 1353–1357 (2015)
Lei, B., Cui, J.H., Xiang, Z.J., Shang, C., Wang, N.Z., Ye, G.J., Luo, X.G., Wu, T., Sun, Z., Chen, X.H.: Evolution of high-temperature superconductivity from a low-T c phase tuned by carrier concentration in FeSe thin flakes. Phys. Rev. Lett. 116, 077002 (2016)
Ye, J.T., Inoue, S., Kobayashi, K., Kasahara, Y., Yuan, H.T., Shimotani, H., Iwasa, Y.: Liquid-gated interface superconductivity on an atomically flat film. Nat. Mater. 9, 125–128 (2010)
Ueno, K., Nakamura, S., Shimotani, H., Ohtomo, A., Kimura, N., Nojima, T., Aoki, H., Iwasa, Y., Kawasaki, M.: Electric-field-induced superconductivity in an insulator. Nat. Mater. 7, 855–858 (2008)
Perez-Munoz, A.M., Schio, P., Poloni, R., Fernandez-Martinez, A., Rivera-Calzada, A., Cezar, J.C., Salas-Colera, E., Castro, G.R., Kinney, J., Leon, C., Santamaria, J., Garcia-Barriocanal, J., Goldman, A.M.: In operando evidence of deoxygenation in ionic liquid gating of YBa2Cu3O7-X. Proc. Natl. Acad. Sci. U. S. A. 114, 215–220 (2017)
Jin, K., Hu, W., Zhu, B., Kim, D., Yuan, J., Sun, Y., Xiang, T., Fuhrer, M.S., Takeuchi, I., Greene, R.L.: Evolution of electronic states in n-type copper oxide superconductor via electric double layer gating. Sci. Rep. 6, 26642 (2016)
Bollinger, A.T., Dubuis, G., Yoon, J., Pavuna, D., Misewich, J., Bozovic, I.: Superconductor-insulator transition in La2-xSrxCuO4 at the pair quantum resistance. Nature. 472, 458–460 (2011)
Božović, I.: A conventional conundrum. Nat. Phys. 12, 22–24 (2016)
Feng, Z.P., Yuan, J., He, G., Hu, W., Lin, Z.F., Li, D., Jiang, X.Y., Huang, Y.L., Ni, S.L., Li, J., Zhu, B.Y., Dong, X.L., Zhou, F., Wang, H.B., Zhao, Z.X., Jin, K.: Tunable critical temperature for superconductivity in FeSe thin films by pulsed laser deposition. Sci. Rep. 8, 4039 (2018)
Jin, K., Butch, N.P., Kirshenbaum, K., Paglione, J., Greene, R.L.: Link between spin fluctuations and electron pairing in copper oxide superconductors. Nature. 476, 73 (2011)
Fiory, A.T., Hebard, A.F., Mankiewich, P.M., Howard, R.E.: Penetration depths of high T c films measured by two-coil mutual inductances. Appl. Phys. Lett. 52, 2165–2167 (1988)
Claassen, J.H., Wilson, M.L., Byers, J.M., Adrian, S.: Optimizing the two-coil mutual inductance measurement of the superconducting penetration depth in thin films. J. Appl. Phys. 82, 3028–3034 (1997)
Turneaure, S.J., Pesetski, A.A., Lemberger, T.R.: Numerical modeling and experimental considerations for a two-coil apparatus to measure the complex conductivity of superconducting films. J. Appl. Phys. 83, 4334–4343 (1998)
Duan, M.C., Liu, Z.L., Ge, J.F., Tang, Z.J., Wang, G.Y., Wang, Z.X., Guan, D., Li, Y.Y., Qian, D., Liu, C., Jia, J.F.: Development of in situ two-coil mutual inductance technique in a multifunctional scanning tunneling microscope. Rev. Sci. Instrum. 88, 073902 (2017)
Skinta, J.A., Kim, M.S., Lemberger, T.R., Greibe, T., Naito, M.: Evidence for a transition in the pairing symmetry of the electron-doped cuprates La2-xCexCuO4-y and Pr2-xCexCuO4-y. Phys. Rev. Lett. 88, 207005 (2002)
Clem, J.R., Coffey, M.W.: Vortex dynamics in a type-II superconducting film and complex linear-response functions. Phys. Rev. B. 46, 14662–14674 (1992)
Kinney, J., Garcia-Barriocanal, J., Goldman, A.M.: Homes scaling in ionic liquid gated La2CuO4+x thin films. Phys. Rev. B. 92, 100505 (2015)
Bozovic, I., He, X., Wu, J., Bollinger, A.T.: Dependence of the critical temperature in overdoped copper oxides on superfluid density. Nature. 536, 309–311 (2016)
Rout, P.K., Budhani, R.C.: Interface superconductivity in La1.48Nd0.4Sr0.12CuO4/La1.84Sr0.16CuO4 bilayers. Phys. Rev. B. 82, 024518 (2010)
Uemura, Y.J., Luke, G.M., Sternlieb, B.J., Brewer, J.H., Carolan, J.F., Hardy, W.N., Kadono, R., Kempton, J.R., Kiefl, R.F., Kreitzman, S.R., Mulhern, P., Riseman, T.M., Williams, D.L., Yang, B.X., Uchida, S., Takagi, H., Gopalakrishnan, J., Sleight, A.W., Subramanian, M.A., Chien, C.L., Cieplak, M.Z., Xiao, G., Lee, V.Y., Statt, B.W., Stronach, C.E., Kossler, W.J., Yu, X.H.: Universal correlations between T c and ns /m* (carrier density over effective mass) in high-T c cuprate superconductors. Phys. Rev. Lett. 62, 2317–2320 (1989)
Shengelaya, A., Khasanov, R., Eshchenko, D.G., Di Castro, D., Savic, I.M., Park, M.S., Kim, K.H., Lee, S.I., Muller, K.A., Keller, H.: Muon-spin-rotation measurements of the penetration depth of the infinite-layer electron-doped Sr0.9La0.1CuO2 cuprate superconductor. Phys. Rev. Lett. 94, 127001 (2005)
He, X., Gozar, A., Sundling, R., Bozovic, I.: High-precision measurement of magnetic penetration depth in superconducting films. Rev. Sci. Instrum. 87, 113903 (2016)
Božović, I., He, X., Wu, J., Bollinger, A.T.: The demise of superfluid density in overdoped La2-xSrxCuO4 films grown by molecular beam epitaxy. J. Supercond. Nov. Magn. 30, 1345–1348 (2017)
Božović, I., He, X., Wu, J., Bollinger, A.T.: The vanishing superfluid density in cuprates—and why it matters. J. Supercond. Nov. Magn. 31, 2683–2690 (2018)
Hetel, I., Lemberger, T.R., Randeria, M.: Quantum critical behaviour in the superfluid density of strongly underdoped ultrathin copper oxide films. Nature Physics 3, 700-702 (2007)
Qin, M., Lin, Z., Wei, Z., Zhu, B., Yuan, J., Takeuchi, I., Jin, K.: High-throughput research on superconductivity. Chin. Phys. B 27, 127402 (2018)
