Lifting ofxz/yzorbital degeneracy at the structural transition in detwinned FeSe
نویسندگان
چکیده
منابع مشابه
Orbital-selective Mott transition out of band degeneracy lifting.
We outline a general mechanism for orbital-selective Mott transition, the coexistence of both itinerant and localized conduction electrons, and show how it can take place in a wide range of realistic situations, even for bands of identical width and correlation, provided a crystal field splits the energy levels in manifolds with different degeneracies and the exchange coupling is large enough t...
متن کاملElectronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe
We report high resolution angle-resolved photo-emission spectroscopy (ARPES)measurements of detwinned FeSe single crystals. The application of amechanical strain is used to promote the volume fraction of one of the orthorhombic domains in the sample, whichwe estimate to be 80% detwinned. While the full structure of the electron pockets consisting of two crossed ellipsesmay be observed in the te...
متن کاملLifting of multiphase degeneracy by quantum fluctuations.
We study the effect of quantum fluctuations on the multiphase point of the Heisenberg model with firstand second-neighbor competing interactions and strong uniaxial spin anisotropy D. By studying the structure of perturbation theory we show that the multiphase degeneracy which exists for S=∞ (i.e., for the axial nextnearest-neighbor Ising model) is lifted and that the effect of quantum fluctuat...
متن کاملHyperfine-induced lifting of parity degeneracy in noninverting molecules.
We report experimental evidence for the splitting of E levels in SiF4, which are degenerate in parity as far as the rovibrational Hamiltonian solely is concerned. The parity degeneracy of rovibrational levels is in fact lifted by hyperfine interactions, even though the associated total spin is I 0. We compare this situation with that in other molecules (SF 6 and PH 3) for which similar effect...
متن کاملMott transition at large orbital degeneracy: Dynamical mean-field theory
S. Florens, A. Georges, G. Kotliar, and O. Parcollet Laboratoire de Physique Théorique, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris Cedex 05, France and Laboratoire de Physique des Solides, Université Paris-Sud, Bât. 510, 91405 Orsay, France Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 Service de Physique Théorique,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2014
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.90.121111