Layer stacking in tetragonal altermagnetic bilayers imposes symmetry constraints that enable tuning of spin and valley degrees of freedom via interlayer sliding and external electric fields, producing spontaneous valley splitting and enhanced TMR.
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Layer-mediated tuning of spin and valley physics in stacked tetragonal altermagnetic bilayers
Layer stacking in tetragonal altermagnetic bilayers imposes symmetry constraints that enable tuning of spin and valley degrees of freedom via interlayer sliding and external electric fields, producing spontaneous valley splitting and enhanced TMR.