Quantum bicriticality in Mn1 − x Fe x Si solid solutions: Exchange and percolation effects

Scrutinizing Hall Effect inMn1−xFexSi: Fermi Surface Evolution and Hidden Quantum Criticality

“…This QCP located at x * ∼ 0.11 − 0.12 ( Fig. 1) [4][5][6][7][8] is hidden by a surrounding phase with short-range magnetic order (SRO) [5,7,8] that agrees well with the theoretical models [9,10]. This SRO phase referred sometimes as chiral spin liquid [9] is destroyed at the second QCP x c ∼ 0.24 ( Fig.…”

“…Recently, comprehensive neutron scattering study [4,5] together with magnetic data [6][7][8] and specific heat measurements [7] discovered a QCP corresponding to the suppression of spiral phase with long-range magnetic order (LRO) in Mn 1−x Fe x Si. This QCP located at x * ∼ 0.11 − 0.12 ( Fig.…”

Hidden quantum phase transition in Mn1−xFexGe evidenced by small-angle neutron scattering

“…This SRO phase, sometimes referred as chiral spin liquid [8], which is destroyed at the second QCP x c2 ≈ 0.24. Thus it has been shown that Mn 1−x Fe x Si undergoes a sequence of the two quantum phase transitions [7].The real breakthrough in understanding of the experimental facts mentioned above has been done via scrutinizing the Hall effect in Mn 1−x Fe x Si [10]. It was found that the substitution of Mn with Fe results rather in the hole doping opposite to the natural expectations on the electron doping.…”

“…The neutron scattering studies [4,5] together with magnetic data and specific heat measurements [3,6,7] discovered a quantum critical point (QCP) corresponding to the suppression of the spin spiral phase with long-range order (LRO) in Mn 1−x Fe x Si. This QCP located at x c1 ≈ 0.11 − 0.12 is, however, hidden by a short-range order of the spin helix (SRO) [5][6][7] that agrees well with the theoretical models [8,9]. This SRO phase, sometimes referred as chiral spin liquid [8], which is destroyed at the second QCP x c2 ≈ 0.24.…”

“…This SRO phase, sometimes referred as chiral spin liquid [8], which is destroyed at the second QCP x c2 ≈ 0.24. Thus it has been shown that Mn 1−x Fe x Si undergoes a sequence of the two quantum phase transitions [7].…”