First-order phase transition vs. spin-state quantum-critical scenarios in strain-tuned epitaxial cobaltite thin films

Autor: Dewey, J. E., Chaturvedi, V., Webb, T. A., Sharma, P., Postiglione, W. M., Quarterman, P., Balakrishnan, P. P., Kirby, B. J., Figari, L., Korostynski, C., Jacobson, A., Birol, T., Fernandes, R. M., Pasupathy, A. N., Leighton, C.

Pr-containing perovskite cobaltites exhibit unusual valence transitions, coupled to coincident structural, spin-state, and metal-insulator transitions. Heteroepitaxial strain was recently used to control these phenomena in the model (Pr$_{1-y}$Y$_y$)

Externí odkaz: http://arxiv.org/abs/2311.06127

Two-component electronic phase separation in the doped Mott insulator Y$_{1-x}$Ca$_{x}$TiO$_{3}$

Autor: Hameed, S., Joe, J., Gautreau, D. M., Freeland, J. W., Birol, T., Greven, M.

Publikováno v: Phys. Rev. B 104, 045112 (2021)

One of the major puzzles in condensed matter physics has been the observation of a Mott-insulating state away from half-filling. The filling-controlled Mott insulator-metal transition, induced via charge-carrier doping, has been extensively researche

Externí odkaz: http://arxiv.org/abs/2103.08566

Prediction of Double-Weyl Points in the Iron-Based Superconductor CaKFe$_4$As$_4$

Autor: Heinsdorf, N., Christensen, M. H., Iraola, M., Zhang, S., Yang, F., Birol, T., Batista, C. D., Valentí, R., Fernandes, R. M.

Publikováno v: Phys. Rev. B 104, 075101 (2021)

Employing a combination of symmetry analysis, low-energy modeling, and ab initio simulations, we predict the presence of magnetic-field-induced Weyl points close to the Fermi level in CaKFe$_4$As$_4$. Depending on the relative strengths of the magnet

Externí odkaz: http://arxiv.org/abs/2101.05301

Multiferroic behavior confined by symmetry in EuTiO3 films

Autor: Ryan, P. J., Sterbinsky, G. E., Choi, Y., Woicik, J. C., Zhu, Leyi, Jiang, J. S., Lee, J-H., Schlom, D. G., Birol, T., Brown, S. D., Thompson, P. B. J., Normile, P. S., Lang, J., Kim, J. -W.

Publikováno v: Phys. Rev. B 101, 180409 (2020)

We have elucidated the spin, lattice, charge and orbital coupling mechanism underlying the multiferroic character in tensile strained EuTiO3 films. Symmetry determined by oxygen octahedral tilting shapes the hybridization between the Eu 4f and Ti 3d

Externí odkaz: http://arxiv.org/abs/2002.01996

Unconventional insulator-to-metal phase transition in Mn 3 Si 2 Te 6 .

Autor: Gu Y; Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA., Smith KA; Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA., Saha A; Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA., De C; Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea.; Quantum Materials Science Unit, Okinawa Institute of Science and Technology, Okinawa, 904-0495, Japan., Won CJ; Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea., Zhang Y; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA., Lin LF; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA., Cheong SW; Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea.; Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, 08854, USA.; Rutgers Center for Emergent Materials, Rutgers University, Piscataway, NJ, 08854, USA., Haule K; Center for Materials Theory and Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, 08854, USA., Ozerov M; National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA., Birol T; Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA., Homes C; National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA., Dagotto E; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA.; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA., Musfeldt JL; Department of Chemistry, University of Tennessee, Knoxville, TN, 37996, USA. musfeldt@tennessee.edu.; Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA. musfeldt@tennessee.edu.

Publikováno v: Nature communications [Nat Commun] 2024 Sep 16; Vol. 15 (1), pp. 8104. Date of Electronic Publication: 2024 Sep 16.