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Interface ferroelectric transition near the gap-opening temperature in a single-unit-cell FeSe film grown on Nb-Doped SrTiO3 substrate.
Cui, Y-T; Moore, R G; Zhang, A-M; Tian, Y; Lee, J J; Schmitt, F T; Zhang, W-H; Li, W; Yi, M; Liu, Z-K; Hashimoto, M; Zhang, Y; Lu, D-H; Devereaux, T P; Wang, L-L; Ma, X-C; Zhang, Q-M; Xue, Q-K; Lee, D-H; Shen, Z-X.
Afiliação
  • Cui YT; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Moore RG; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Zhang AM; Department of Physics, Renmin University of China, Beijing 100872, China.
  • Tian Y; Department of Physics, Renmin University of China, Beijing 100872, China.
  • Lee JJ; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Schmitt FT; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Zhang WH; State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
  • Li W; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Yi M; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Liu ZK; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Hashimoto M; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Zhang Y; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA and Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Lu DH; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Devereaux TP; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
  • Wang LL; State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
  • Ma XC; State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
  • Zhang QM; Department of Physics, Renmin University of China, Beijing 100872, China.
  • Xue QK; State Key Lab of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China and Collaborative Innovation Center of Quantum Matter, Beijing 100871, China.
  • Lee DH; Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA and Material Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Shen ZX; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
Phys Rev Lett ; 114(3): 037002, 2015 Jan 23.
Article em En | MEDLINE | ID: mdl-25659015
We report findings of strong anomalies in both mutual inductance and inelastic Raman spectroscopy measurements of single-unit-cell FeSe film grown on Nb-doped SrTiO3, which occur near the temperature where the superconductinglike energy gap opens. Analysis suggests that the anomaly is associated with a broadened ferroelectric transition in a thin layer near the FeSe/SrTiO3 interface. The coincidence of the ferroelectric transition and gap-opening temperatures adds credence to the central role played by the film-substrate interaction on the strong Cooper pairing in this system. We discuss scenarios that could explain such a coincidence.
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article