Extended s-wave altermagnets are introduced as fully gapped spin-compensated states with isotropic spin splitting arising from valley-exchange symmetries, shown via effective two-valley and microscopic models with guiding principles for identification.
Cayssol, Crossed Andreev Reflection in a Graphene Bipolar Transistor, Physical Review Letters 100, 147001 (2008)
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Extended s-wave altermagnets
Extended s-wave altermagnets are introduced as fully gapped spin-compensated states with isotropic spin splitting arising from valley-exchange symmetries, shown via effective two-valley and microscopic models with guiding principles for identification.