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Non-uniform doping across the Fermi surface of NbS2 intercalates

Battaglia, C. ; Cercellier, H. ; Despont, L. ; Monney, C. ; Prester, M. ; Berger, H. ; Forró, L. ; Garnier, M. G. ; Aebi, P.

In: The European Physical Journal B, 2007, vol. 57, no. 4, p. 385-390

Dramatic effective mass reduction driven by a strong potential of competing periodicity

Monney, Claude ; Schwier, Eike Fabian ; Garnier, Michael G. ; Battaglia, C. ; Mariotti, N. ; Didiot, Clément ; Cercellier, H. ; Marcus, J. ; Berger, H. ; Titov, A. N. ; Beck, Hans ; Aebi, Philipp

In: Europhysics Letters, 2010, vol. 92, no. 4, p. 47003

We present angle-resolved photoemission experiments on 1T-TiSe₂ at temperatures ranging from 13 K to 288 K. The data evidence a dramatic renormalization of the conduction band below 100 K, whose origin can be related to the new potential responsible for the charge density wave phase at low temperature in this system. The renormalization translates into a substantial effective mass...

Temperature-dependent photoemission on 1T-TiSe₂: Interpretation within the exciton condensate phase model

Monney, Claude ; Schwier, Eike Fabian ; Garnier, Michael G. ; Mariotti, Nicholas ; Didiot, Clément ; Beck, Hans ; Aebi, Philipp ; Cercellier, H. ; Marcus, J. ; Battaglia, C. ; Berger, H.

In: Physical Review B, 2010, vol. 81, no. 15, p. 1551104

The charge-density-wave phase transition of 1T-TiSe₂ is studied by angle-resolved photoemission over a wide temperature range. An important chemical-potential shift which strongly evolves with temperature is evidenced. In the framework of the exciton condensate phase, the detailed temperature dependence of the associated order parameter is extracted. Having a mean-field-like behavior at low...