Coexistence of charge-density wave and ferromagnetism in Ni2MnGa | Zendy

S. W. D’Souza | Zendy; Abhishek Rai | Zendy; Jayita Nayak | Zendy; M. Maniraj | Zendy; R. S. Dhaka | Zendy; S. R. Barman | Zendy; D. L. Schlagel | Zendy; T. A. Lograsso | Zendy; Aparna Chakrabarti | Zendy

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Coexistence of charge-density wave and ferromagnetism in Ni2MnGa

Author(s) -

S. W. D’Souza,

Abhishek Rai,

Jayita Nayak,

M. Maniraj,

R. S. Dhaka,

S. R. Barman,

D. L. Schlagel,

T. A. Lograsso,

Aparna Chakrabarti

Publication year - 2012

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.85.085123

Subject(s) - pseudogap , condensed matter physics , charge density wave , ferromagnetism , physics , spectral line , charge (physics) , phase (matter) , materials science , lattice (music) , quantum mechanics , cuprate , doping , superconductivity , acoustics

We demonstrate the existence of a charge-density-wave (CDW) associated with an incommensurate periodic lattice distortion on Ni${}_{2}$MnGa surface in the ferromagnetic state. Our temperature-dependent photoemission spectra provide compelling evidence of a pseudogap at the Fermi level for ${T}_{\mathrm{CDW}}$ $\ensuremath{\leqslant}$ 270 K that appears at the onset of the premartensite phase and persists in the martensite phase. While the width of the pseudogap is about 25 meV, a spectral weight transfer is observed over a much wider energy range that is associated with the CDW.

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