Angle-resolved photoemission observation of Mn-pnictide hybridization and negligible band structure renormalization in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>BaMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>As</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
 and 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>BaMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>2</mml:mn></m

Zhang, W. L.; Richard, P.; Roekeghem, Ambroise van; Nie, Simin; Xu, N.; Zhang, P.; Miao, Hu; Wu, S.-F.; Yin, Jia Xin; Bao, Futing; Kong, Ling-Yuan; Qian, Tian; Wang, Zhijun; Fang, Zhong; Sefat, Athena S.; Biermann, Silke; Ding, Hong

doi:10.1103/physrevb.94.155155

Cited by 23 publications

(33 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ARPES study [39] and DFT+DMFT calculations [40] have shown that the valence band of BaMn 2 As 2 mainly consists of Mn 3d x 2 −y 2 and As 4p z orbitals. The doped holes occupy the hybridized d-p orbital, whose wave function is obtained by the LCAO method, |ψ dp ,…”

Section: B Hole-doped Bamn2as2mentioning

confidence: 99%

See 1 more Smart Citation

Magnetic hexadecapole order and magnetopiezoelectric metal state in Ba1−xKxMn2As2

2017

View full text Add to dashboard Cite

We study an odd-parity magnetic multipole order in Ba1−xKxMn2As2 and related materials. Although BaMn2As2 is a seemingly conventional Mott insulator with G-type antiferromagnetic order, we identify the ground state as a magnetic hexadecapole ordered state accompanied by simultaneous time-reversal and space-inversion symmetry breaking. A symmetry argument and microscopic calculations reveal the ferroic ordering of leading magnetic hexadecapole moment and admixed magnetic quadrupole moment. Furthermore, we clarify electromagnetic responses characterizing the magnetic hexadecapole state of semiconducting BaMn2As2 and doped metallic systems. A magnetoelectric effect and antiferromagnetic Edelstein effect are shown. Interestingly, a counter-intuitive currentinduced nematic order occurs in the metallic state. The electric current along the z -axis induces the xy-plane nematicity in sharp contrast to the spontaneous nematic order in superconducting Fe-based 122-compounds. Thus, the magnetic hexadecapole state of doped BaMn2As2 is regarded as a magnetopiezoelectric metal. Other candidate materials for magnetic hexadecapole order are proposed.

show abstract

Section: B Hole-doped Bamn2as2mentioning

confidence: 99%

“…For this purpose, we introduce a tight-binding Hamiltonian for the valence band of BaMn 2 As 2 mainly consisting of Mn d x 2 −y 2 orbital [39,40].…”

Section: Effective Modelmentioning

confidence: 99%

Magnetic hexadecapole order and magnetopiezoelectric metal state in Ba1−xKxMn2As2

2017

View full text Add to dashboard Cite

show abstract

“…In tetrahedral symmetry, Mn 2+ ions in a high-spin state could in fact support this scenario with one t 2g orbital (xy) being more susceptible to hybridization. Moreover, angleresolved photoemission spectroscopy (ARPES) experiments observed Mn-pnictide hybridization in BaMn 2 As 2 and BaMn 2 Sb 2 [18].…”

Section: Introductionmentioning

confidence: 99%

Putative hybridization gap in CaMn2Bi2 under applied pressure

et al. 2019

View full text Add to dashboard Cite

We report electrical transport measurements on CaMn2Bi2 single crystals under applied pressure. At ambient pressure and high temperatures, CaMn2Bi2 behaves as a single-band semimetal hosting Néel order at TN = 150 K. At low temperatures, multi-band behavior emerges along with an activated behavior typical of degenerate semiconductors. The activation gap is estimated to be ∆ ∼ 20 K. Applied pressure not only favors the antiferromagnetic order at a rate of 0.40(2) K/kbar, but also enhances the activation gap at 20 kbar by about 70 %. This gap enhancement is typical of correlated narrow-gap semiconductors such as FeSi and Ce3Bi4Pt3, and places CaMn2Bi2 as a Mn-based hybridization-gap semiconductor candidate. Ab initio calculations based on the density functional theory are shown to be insufficient to describe the ground state of CaMn2Bi2. arXiv:1907.09984v1 [cond-mat.str-el]

show abstract

“…Strictly, however, half-filled systems with d 5 configuration have to be regarded as the Mott-type parent compounds, which is confirmed by the semiconducting properties of e.g. BaMn 2 As 2 [5][6][7][8][9] as well as of LaOMnAs and LiMnAs [10 and 11].…”

Section: Introductionmentioning

confidence: 99%

Antiferromagnetic structure and electronic properties ofBaCr2As2andBaCrFeAs2

et al. 2017

View full text Add to dashboard Cite

The chromium arsenides BaCr2As2 and BaCrFeAs2 with ThCr2Si2 type structure (space group I4/mmm; also adopted by '122' iron arsenide superconductors) have been suggested as mother compounds for possible new superconductors. DFT-based calculations of the electronic structure evidence metallic antiferromagnetic ground states for both compounds. By powder neutron diffraction we confirm for BaCr2As2 a robust ordering in the antiferromagnetic G-type structure at TN = 580 K with µCr = 1.9 µB at T = 2 K. Anomalies in the lattice parameters point to magneto-structural coupling effects. In BaCrFeAs2 the Cr and Fe atoms randomly occupy the transition-metal site and G-type order is found below 265 K with µ Cr/Fe = 1.1 µB.57 Fe Mössbauer spectroscopy demonstrates that only a small ordered moment is associated with the Fe atoms, in agreement with electronic structure calculations with µFe ∼ 0. The temperature dependence of the hyperfine field does not follow that of the total moments. Both compounds are metallic but show large enhancements of the linear specific heat coefficient γ with respect to the band structure values. The metallic state and the electrical transport in BaCrFeAs2 is dominated by the atomic disorder of Cr and Fe and partial magnetic disorder of Fe. Our results indicate that Néel-type order is unfavorable for the Fe moments and thus it is destabilized with increasing iron content.

show abstract

Angle-resolved photoemission observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMn2As2 and BaMn2Sb2

Cited by 23 publications

References 33 publications

Magnetic hexadecapole order and magnetopiezoelectric metal state in Ba1−xKxMn2As2

Magnetic hexadecapole order and magnetopiezoelectric metal state in Ba1−xKxMn2As2

Putative hybridization gap in CaMn2Bi2 under applied pressure

Antiferromagnetic structure and electronic properties ofBaCr2As2andBaCrFeAs2

Contact Info

Product

Resources

About