Order-disorder type of Peierls instability in BaVS3

被引:5
|
作者
Ilakovac, Vita [1 ,2 ]
Girard, Adrien [3 ]
Baledent, Victor [4 ]
Foury-Leylekian, Pascale [4 ]
Winkler, Bjoern [5 ]
Berger, Helmuth [7 ]
Bosak, Alexei [8 ]
Pouget, Jean-Paul [4 ]
Kupcic, Ivan [6 ]
机构
[1] Sorbonne Univ, Lab Chim Phys Matiere & Rayonnement, CNRS, F-75252 Paris, France
[2] CY Cergy Paris Univ, Dept Phys, F-95031 Cergy Pontoise, France
[3] Sorbonne Univ, MONARIS, CNRS, F-75252 Paris, France
[4] Univ Paris Saclay, Lab Phys Solides, CNRS, F-91405 Orsay, France
[5] Goethe Univ Frankfurt, Inst Geowissensch, D-60438 Frankfurt, Germany
[6] Univ Zagreb, Fac Sci, Dept Phys, HR-10002 Zagreb, Croatia
[7] Ecole Polytech Fed Lausanne EPFL, CH-1015 Lausanne, Switzerland
[8] ESRF European Synchrotron, F-38000 Grenoble, France
关键词
CHARGE-DENSITY-WAVE; ELECTRONIC-STRUCTURE; NEUTRON-SCATTERING; LIQUID BEHAVIOR; 1ST PRINCIPLES; FERMI-SURFACE; TRANSITIONS; DYNAMICS; PHASE; STATE;
D O I
10.1103/PhysRevB.103.014306
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Lattice dynamics of low-dimensional BaVS3 is reported across the metal-insulator Peierls transition occurring at T-P = 69 K using a combination of the thermal diffuse scattering of x rays, inelastic x-ray scattering, and density-functional theory calculations. The nondetection of a Kohn anomaly points to a unique situation of an order-disorder Peierls instability with a quasielastic critical scattering which has been fully characterized. These observations are discussed in the scope of a Peierls instability dominated by strong electron-phonon coupling and/or nonadiabatic effects.
引用
收藏
页数:12
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