Research/Sitter/MAGNDATA / 0.607_RuO2.mcif

RuO₂

MAGNDATA entry 0.607 · source

d-wave altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion. d-wave: the splitting changes sign twice around the Fermi surface (2 nodal planes).

Spin group ²4/¹m²m¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered > 300 K (27 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 4₂′/m n m′ BNS 136.499
Parent space group	P 4₂/m n m No. 136
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 4.492 · b 4.492 · c 3.1061 Å · α 90° · β 90° · γ 90°
Transition	>300 K (27 °C)
Measured at	295 K
Magnetic ions	Ru
Largest moment component	0.05 μ_B
Method	NSD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in P 4₂′/m n m′ →

Atom sites · 2 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ru1	Ru	0	0	0	0	0	0.05	0.05
O1	O	0.3056	0.3056	0

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

T. Berlijn et al. PHYSICAL REVIEW LETTERS (2017) · doi:10.1103/PhysRevLett.118.077201

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.607_RuO2.mcif from MAGNDATA · entry page

sha256 of this copy: 15cae33bd2f1ee1b0332a634325a954d829d56ec80a5efe96f9b710714abcaf5
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.607_RuO2.mcif.