Possible candidate for the realization of the floating phase in the S=5/2 frustrated spin-chain model: K3Fe(MoO4)2(Mo2O7 )

Boya, K.Indian Inst Technol Tirupati, Dept Phys, Tirupati 517506, India.;Govt Polytech, Srikakulam 532005, Andhra Pradesh, India. (författare)

Possible candidate for the realization of the floating phase in the S=5/2 frustrated spin-chain model : K3Fe(MoO4)2(Mo2O7 )

The frustrated spin-chain (FSC) systems exhibit exotic ground states and distinct quantum phase transitions. The ?=1/2 FSC is known to exhibit the Kosterlitz-Thouless transition from a commensurate gapless phase to a fully dimerized gapped phase upon the ratio of next-nearest-neighbor to nearest-neighbor coupling (?=?2/?1) being tuned. On the other hand, the ?=5/2 FSC system is known to show transitions from a commensurate gapless phase to partially dimerized and incommensurate floating phases [Chepiga, Affleck, and Mila, Phys. Rev. B 105, 174402 (2022)]. While a large region of the floating phase has been theoretically predicted for the ?=5/2 FSC model when ?>0.43, it is yet to be explored experimentally. Here, we have investigated a compound K3⁢Fe⁢(MoO4)2⁢(Mo2⁢O7), having well-separated ?=5/2 FSCs. The electronic structure calculations show that the ?=?2/?1 is close to 0.9, being similar to another FSC compound Bi3⁢FeMo2⁢O12 (?≈1.1). No magnetic long-range order is found down to 0.09 K, despite the relatively sizable Curie-Weiss temperature ??⁢?=−18K. The magnetic heat capacity shows the power-law behavior, indicating that the compound exhibits gapless excitations. Based on the experimental results and the theoretical calculations employed by density functional theory, we argue that the titled system is a possible candidate for exhibiting the floating phase.

Nam, K.Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea.;Seoul Natl Univ, Inst Appl Phys, Seoul 151747, South Korea. (författare)
Kargeti, K.Bennett Univ, Dept Phys, Greater Noida 201310, Uttar Pradesh, India. (författare)
Ershadrad, SoheilUppsala universitet,Materialteori(Swepub:uu)soher256 (författare)
Kumar, R.Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Mumbai 400005, India. (författare)
Panda, S. K.Bennett Univ, Dept Phys, Greater Noida 201310, Uttar Pradesh, India. (författare)
Sanyal, BiplabUppsala universitet,Materialteori(Swepub:uu)bisan676 (författare)
Manna, A. K.Indian Inst Technol Tirupati, Dept Chem, Tirupati 517619, India. (författare)
Paulose, P. L.Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Mumbai 400005, India. (författare)
Kim, Kee HoonSeoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea.;Seoul Natl Univ, Inst Appl Phys, Seoul 151747, South Korea. (författare)
Koteswararao, B.Indian Inst Technol Tirupati, Dept Phys, Tirupati 517506, India. (författare)
Indian Inst Technol Tirupati, Dept Phys, Tirupati 517506, India.;Govt Polytech, Srikakulam 532005, Andhra Pradesh, India.Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea.;Seoul Natl Univ, Inst Appl Phys, Seoul 151747, South Korea. (creator_code:org_t)

Av författaren/redakt...: Boya, K.; Nam, K.; Kargeti, K.; Ershadrad, Sohei ...; Kumar, R.; Panda, S. K.; visa fler...; Sanyal, Biplab; Manna, A. K.; Paulose, P. L.; Kim, Kee Hoon; Koteswararao, B.; visa färre...

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