{"product_id":"csv-te-o-cesium-vanadium-oxytelluride","title":"CsV₂Te₂O (Cesium Vanadium Oxytelluride)","description":"\u003cp\u003eCsV\u003csub\u003e2\u003c\/sub\u003eTe\u003csub\u003e2\u003c\/sub\u003eO is a layered vanadium oxytelluride of the '1221' oxychalcogenide family, crystallizing in the tetragonal P4\/mmm structure with two-dimensional V\u003csub\u003e2\u003c\/sub\u003eO square nets sandwiched between tellurium layers and separated by Cs layers (as grown, the crystals are typically slightly Cs-deficient, Cs\u003csub\u003e1-δ\u003c\/sub\u003eV\u003csub\u003e2\u003c\/sub\u003eTe\u003csub\u003e2\u003c\/sub\u003eO with δ ≈ 0.2). It is the first material in which \u003cstrong\u003ehidden altermagnetism\u003c\/strong\u003e has been experimentally demonstrated: its G-type collinear antiferromagnetic order (Néel temperature near room temperature, ~257–293 K) stacks two-dimensional altermagnetic layers with alternating local spin polarizations, so the bulk bands remain spin-degenerate while each layer carries a d-wave, momentum-dependent spin splitting — verified by neutron diffraction together with spin-resolved ARPES. First-principles calculations find a robust Néel-type antiferromagnetic ground state with orbital-selective spin splitting at the Fermi level, and a secondary transition near 70 K. CsV\u003csub\u003e2\u003c\/sub\u003eTe\u003csub\u003e2\u003c\/sub\u003eO single crystals provide a unique platform for studying \u003cstrong\u003ehidden altermagnetism, layered spin polarization, and altermagnetic spintronics\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrowth method:\u003c\/strong\u003e Self-flux growth. Note: the crystals are moisture-sensitive; storage under inert atmosphere or vacuum is recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e Single crystal, typical size ~1–1.5 mm; purity up to 99.9999% (6N). Multiple high-quality single-crystal pieces are included in each package.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExfoliation difficulty:\u003c\/strong\u003e Moderate — a layered van der Waals crystal that can be mechanically cleaved\/exfoliated, although the ionic interlayer bonding makes isolating ultrathin flakes more demanding than in typical van der Waals materials.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e A small amount of potassium (~5%) may remain in the crystals: potassium is removed by deintercalation during synthesis, and its complete removal cannot always be guaranteed. Like other crystals of this family, the as-grown material is typically slightly Cs-deficient (Cs\u003csub\u003e1-δ\u003c\/sub\u003eV\u003csub\u003e2\u003c\/sub\u003eTe\u003csub\u003e2\u003c\/sub\u003eO, δ ≈ 0.2).\u003c\/p\u003e","brand":"2D Material Supermarket","offers":[{"title":"Default Title","offer_id":54712257151160,"sku":"2MS-CsV2Te2O","price":6435.0,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0649\/0069\/4200\/files\/logo-main-1600_79a5a70a-0c84-4ca9-8b57-6097dfd834c2.png?v=1794313850","url":"https:\/\/2dmaterialsupermarket.com\/products\/csv-te-o-cesium-vanadium-oxytelluride","provider":"2D Material Supermarket","version":"1.0","type":"link"}