We report the observation of pressure-induced changes in the electronic structures of La1−xSrxMnO3 LSMO by hard x-ray photoemission spectroscopy. Application of compressive and tensile strains results in the formation of a gap at the Fermi level EF and suppression of spectral weight at EF, respectively, across magnetic phase transitions. In contrast, no detectable change is observed in the absence of phase transitions
even upon application of pressure. These results indicate that the change in the electronic structure of LSMO does not originate from the lattice distortions alone, but is induced by subtle interplay among the lattice, magnetic, and orbital degrees of freedom.
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