Diluted magnetic semiconductors: An interface of semiconductor physics and magnetism (invited)

Abstract

Integrated magnetic spectroscopy of dilute magnetic semiconductors (invited)This paper reviews the electrical, magnetic, and optical properties of diluted magnetic semiconductors (sometimes also referred to as "semi magnetic" semiconductors). These materials are ternary semiconductor alloys whose lattice is made up in part of substitutional magnetic ions. Cd,_,Mn,Te and Hg,_,Mn,Te are examples of such systems. As semiconductors, these alloys display interesting and important p~o~ertles, su.ch as the variation of the energy gap and of effective mass with composition. They also exhibit magnetlc properties which are interesting in their own right, e.g., a low temperature spin glass transition and magnon excitations. Most importantly, however, the presence of substitutional magnetic ions in these alloys leads to spin-spin exchange interaction between the localized magnetic moments and the band electro~s. This in tu~n has rather important consequences on band structure and on donor and acceptor states, leadmg to dramatlc effects in quantum transport, impurity conduction, and magneto-optics. Specifically, the presence 0: exchan~e interaction results in extremely large and temperature dependent g-factors of electrons and holes; m glgantlc values of Faraday rotation; in anomalously large negative magneto resistance; and in the formation of the bound magnetic polaron.

The Faraday effect in semimagnetic semiconductors

“…Необходимо отметить, что к настоящему времени уже опубликован ряд обзоров, посвященных ПМП [3][4][5][6][7][8][9], однако эффекту Фарадея в них уделено мало места и они не дают полного представления об этом на правлении в интенсивных исследованиях ПМП.…”

Cathodoluminescence Study of Cd1-xMnxTe and Zn1-xMnxTe

“…Many investigations of Cd1-xMnxTe and Ζn1-xMn x Te were carried out with applying different experimental and theoretical methods [1][2][3][4][5][6]. Today, it is clearly understood that for Cd1-x Mn x Τe the fundamental energy gap increase linearly with Mn content [2,3] in opposite to Ζn1-xMnxTe where deviation from linear behaviour in 0 < x < 0.1 region of Mn content has been observed [4].…”

“…The semiconducting compounds Cd 1 -x Mnx Τe and Ζn1-x Mn x Te belong to the family of diluted magnetic semiconduction DMSs [1]. Many investigations of Cd1-xMnxTe and Ζn1-xMn x Te were carried out with applying different experimental and theoretical methods [1][2][3][4][5][6].…”

Vacuum Ultraviolet Reflectivity of Cd1-xFexTe

“…Because of their important semiconducting and magnetic properties [1], DMS have recently been the subject of extensive studies. These ternary systems contain magnetic atoms which randomly replace some of cations in the II-VI semiconductor lattice.…”