@Article{BaydinHROTNKTNRAFK:2022:MaCoSo,
               author = "Baydin, Andrey and Hernadez, Felix Guillermo Gonzalez and 
                         Rodriguez-Vega, Martin and Ozakazi, Anderson Kenji and Tay, Fuyang 
                         and Noe II, G. Timothy and Katayama, Ikufumi and Takeda, Jun and 
                         Nojiri, Hiroyuki and Rappl, Paulo Henrique de Oliveira and 
                         Abramof, Eduardo and Fiete, Gregory A. and Kono, Junichiro",
          affiliation = "{Rice University} and {Universidade de S{\~a}o Paulo (USP)} and 
                         {Los Alamos National Laboratory} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Rice University} and {Rice 
                         University} and {Yokohama National University} and {Yokohama 
                         National University} and {Tohoku University} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Northeastern University} and 
                         {Rice University}",
                title = "Magnetic control of soft chiral phonons in PbTe",
              journal = "Physical Review Letters",
                 year = "2022",
               volume = "128",
                pages = "075901",
             abstract = "PbTe crystals have a soft transverse optical phonon mode in the 
                         terahertz frequency range, which is known to efficiently decay 
                         into heat-carrying acoustic phonons, resulting in anomalously low 
                         thermal conductivity. Here, we studied this phonon via 
                         polarization-dependent terahertz spectroscopy.We observed 
                         softening of this mode with decreasing temperature, indicative of 
                         incipient ferroelectricity, which we explain through a model 
                         including strong anharmonicity with a quartic displacement term. 
                         In magnetic fields up to 25 T, the phonon mode splits into two 
                         modes with opposite handedness, exhibiting circular dichroism. 
                         Their frequencies display Zeeman splitting together with an 
                         overall diamagnetic shift with increasing magnetic field. Using a 
                         group-theoretical approach, we demonstrate that these observations 
                         are the result of magnetic field-induced morphic changes in the 
                         crystal symmetries through the Lorentz force exerted on the 
                         lattice ions. Thus, our Letter reveals a novel process of 
                         controlling phonon properties in a soft ionic lattice by a strong 
                         magnetic field.",
                  doi = "10.1103/PhysRevLett.128.075901",
                  url = "http://dx.doi.org/10.1103/PhysRevLett.128.075901",
                 issn = "0031-9007",
             language = "en",
           targetfile = "baydin_magnetic_2022.pdf",
        urlaccessdate = "25 jun. 2024"
}