{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T11:29:06Z","timestamp":1768476546064,"version":"3.49.0"},"reference-count":54,"publisher":"AIP Publishing","issue":"12","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2007,12,1]]},"abstract":"<jats:p>The oblique modulational instability (MI) of electron-acoustic waves (EAWs) in a quantum plasma whose components are two distinct groups of electrons (one inertial cold electrons and other inertialess hot electrons) and immobile ions is investigated, by using a quantum hydrodynamic model. The analysis is carried out through the derivation of the nonlinear Schr\u00f6dinger equation for the modulated EAW packets. The effects of obliqueness, the quantum diffraction (H), and the equilibrium density ratio of the cold to hot electron component (\u03b4) on the MI of EAWs are numerically examined. At quantum scales, these parameters are found to significantly modify the MI domain in the plane of wave number and the angle (\u03b8) between the modulation and the propagation direction. The relevance of our results in astrophysical environments, as well as in intense laser-solid density plasma interaction experiments is discussed.<\/jats:p>","DOI":"10.1063\/1.2822158","type":"journal-article","created":{"date-parts":[[2007,12,21]],"date-time":"2007-12-21T00:29:31Z","timestamp":1198196971000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":42,"title":["Oblique modulation of electron-acoustic waves in a Fermi electron-ion plasma"],"prefix":"10.1063","volume":"14","author":[{"given":"C.","family":"Bhowmik","sequence":"first","affiliation":[{"name":"Visva-Bharati University Department of Mathematics, Siksha Bhavana, , Santiniketan-731 235, India"}]},{"given":"A. P.","family":"Misra","sequence":"additional","affiliation":[{"name":"Visva-Bharati University Department of Mathematics, Siksha Bhavana, , Santiniketan-731 235, India"}]},{"given":"P. K.","family":"Shukla","sequence":"additional","affiliation":[{"name":"Ruhr-Universit\u00e4t Bochum Institut f\u00fcr Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakult\u00e4t f\u00fcr Physik and Astronomie, , D-44780 Bochum, Germany and School of Physics, , Durban 4000, South Africa"},{"name":"University of KwaZulu-Natal Institut f\u00fcr Theoretische Physik IV and Centre for Plasma Science and Astrophysics, Fakult\u00e4t f\u00fcr Physik and Astronomie, , D-44780 Bochum, Germany and School of Physics, , Durban 4000, South Africa"}]}],"member":"317","published-online":{"date-parts":[[2007,12,20]]},"reference":[{"key":"2023073023225025500_c1","doi-asserted-by":"publisher","first-page":"082309","DOI":"10.1063\/1.2769322","volume":"14","year":"2007","journal-title":"Phys. Plasmas"},{"key":"2023073023225025500_c2a","doi-asserted-by":"publisher","first-page":"3842","DOI":"10.1063\/1.1386430","volume":"8","year":"2001","journal-title":"Phys. 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