Pressure Dependence of the Charge-Density-Wave Gap in Rare-Earth Tri-Tellurides

Journal Article · Mon Dec 14 00:00:00 EST 2009 · Submitted to Physical Review Letters

OSTI ID:969241

Sacchetti, A; Arcangeletti, E; Perucchi, A; Baldassarre, L; Postorino, P; Lupi, S; Ru, N; Fisher, I R; Degiorgi, L

We investigate the pressure dependence of the optical properties of CeTe{sub 3}, which exhibits an incommensurate charge-density-wave (CDW) state already at 300 K. Our data are collected in the mid-infrared spectral range at room temperature and at pressures between 0 and 9 GPa. The energy for the single particle excitation across the CDW gap decreases upon increasing the applied pressure, similarly to the chemical pressure by rare-earth substitution. The broadening of the bands upon lattice compression removes the perfect nesting condition of the Fermi surface and therefore diminishes the impact of the CDW transition on the electronic properties of RTe{sub 3}.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 969241
• Report Number(s): SLAC-PUB-13860; cond-mat/0609175; TRN: US201001%%440
• Journal Information: Submitted to Physical Review Letters, Journal Name: Submitted to Physical Review Letters
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM TELLURIDES
EXCITATION
FERMI LEVEL
ELECTRICAL PROPERTIES
PRESSURE DEPENDENCE
CHARGE DENSITY
OPTICAL PROPERTIES
Other
MATSCI