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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Materials for Quantum Information Processing, Transport, and Storage
  • Quantum Magnet
  • Multiferroic

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Hysteretic melting transition of a soliton lattice in a commensurate charge modulation

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Title
Hysteretic melting transition of a soliton lattice in a commensurate charge modulation
Author
Hsu, Pin-JuiMauerer, TobiasVogt, MatthiasYang, JJOh, Yoon SeokCheong, S-WBode, MatthiasWu, Weida
Keywords
Charge modulation; Hysteretic transition; Melting transitions; Periodic-soliton; Soliton lattice; STM images; STM study; Temperature dependent
Issue Date
2013-12
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.111, no.26, pp.266401 -
Abstract
We report on the observation of the hysteretic transition of a commensurate charge modulation in IrTe2 from transport and scanning tunneling microscopy (STM) studies. Below the transition (T-C approximate to 275 K on cooling), a q = 1/5 charge modulation was observed, which is consistent with previous studies. Additional modulations [q(n) = (3n + 2)(-1)] appear below a second transition at T-S approximate to 180 K on cooling. The coexistence of various modulations persists up to T-C on warming. The atomic structures of charge modulations and the temperature-dependent STM studies suggest that 1/5 modulation is a periodic soliton lattice that partially melts below T-S on cooling. Our results provide compelling evidence that the ground state of IrTe2 is a commensurate 1/6 charge modulation, which originates from the periodic dimerization of Te atoms visualized by atomically resolved STM images.
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DOI
10.1103/PhysRevLett.111.266401
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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