Negative plasmon dispersion in 2H-NbS2beyond the charge-density-wave interpretation
نویسندگان
چکیده
منابع مشابه
Quasiparticle interference, quasiparticle interactions, and the origin of the charge density wave in 2H-NbSe2.
We show that a small number of intentionally introduced defects can be used as a spectroscopic tool to amplify quasiparticle interference in 2H-NbSe2 that we measure by scanning tunneling spectroscopic imaging. We show, from the momentum and energy dependence of the quasiparticle interference, that Fermi surface nesting is inconsequential to charge density wave formation in 2H-NbSe2. We demonst...
متن کاملVisualizing the charge density wave transition in 2H-NbSe2 in real space
C. J. Arguello,1,* S. P. Chockalingam,1,* E. P. Rosenthal,1 L. Zhao,1 C. Gutiérrez,1 J. H. Kang,1 W. C. Chung,1 R. M. Fernandes,1 S. Jia,2 A. J. Millis,1 R. J. Cava,2 and A. N. Pasupathy1 1Department of Physics, Columbia University, New York, New York 10027, USA 2Department of Chemistry, Princeton University, Princeton, New Jersey 08540, USA (Received 1 July 2013; revised manuscript received 4 ...
متن کاملOn the pressure dependence of a charge density wave state in 2H-Tas 2
2014 The onset of a charge density wave has been studied by resistivity measurements in 2H-TaS2 up to 33 kbar. The pressure coefficient of TCDW is ~ ln TCDW/~P = 2.9 10-3 kbar-1 at ambient pressure. A larger pressure dependence occurs at higher pressure and suggests that the normal metallic state of 2H-TaS2 may be stable down to 0 K above 43 kbar. The relation between a CDW state and the pressu...
متن کاملEmergence of coherence in the charge-density wave state of 2H-NbSe2
A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite amplitude and long-range phase coherence set in simultaneously at the CDW transition temperature T(cdw). Here we investigate, using photoemission, X-ray scattering and scanning tunnelling micr...
متن کاملCoexistence of gapless excitations and commensurate charge-density wave in the 2H transition metal dichalcogenides.
An unexpected feature common to 2H transition metal dichalcogenides ( 2H TMDs) is revealed with a first-principles Wannier function analysis of the electronic structure of the prototype 2H TaSe2: The low-energy Ta "5d(z2)" bands governing the physics of a charge-density wave (CDW) is dominated by hopping between next-nearest neighbors. With this motivation we develop a minimal effective model f...
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: New Journal of Physics
سال: 2016
ISSN: 1367-2630
DOI: 10.1088/1367-2630/18/10/103050