Electronic and Magnetic Properties of Black Phosphorus

Abstract

Black phosphorus (bP) has emerged as the next member in the graphene inspired two‐dimensional materials family. Its electronic and magnetic properties are studied herein using electron and nuclear magnetic resonance techniques (ESR and NMR) and microwave conductivity measurement. The latter is a unique technique to study conductivity on air sensitive samples. The ESR study indicates the absence of free charge carriers and no sign of paramagnetic defects are found. 31P NMR shows the presence of a characteristic Pake doublet structure due to the interaction between I = 1/2 nuclei. Microwave conductivity shows, in accordance with the ESR results, that black phosphorus behaves as a semiconductor and we identify extrinsic and intrinsic charge carrier contributions to the conductivity and extracted the sizes of the gaps. ESR measurement also yields that bP might find applications as a microwave absorbent.

Electronic Properties of Air‐Sensitive Nanomaterials Probed with Microwave Impedance Measurements

“…The pristine material behaves as a semiconductor with a smaller and a larger band gap (visualized in the inset of Figure ), in agreement with previous literature observations . KP 8 exhibits a similar role below 49 K with a slightly different small gap.…”

“…The pristine material behaves as a semiconductor with a smaller and a larger band gap (visualized in the inset of Figure 1), in agreement with previous literature observations. [43][44][45] KP 8 exhibits a similar role below 49 K with a slightly different small gap. The conductivity of this regime is dominated by the thermally excited electrons through the small band gap.…”

Exploring the Formation of Black Phosphorus Intercalation Compounds with Alkali Metals

“…[3,4] BP has attracted enormous attention owing to its high p-type charge carrier mobility up to around 6000 cm 2 V À1 s À1 and its tunable direct band gap ranging from about 0.3 eV for bulk to approximately 2eVfor monolayers. [2,[9][10][11][12][13][14][15][16] It has recently been predicted that the electronic properties of BP can be modulated by strain or electric field. [17,18] Moreover,s urface doping with Ka toms leads to at unable band gap in singlecrystal BP,l eading am etallic state yielding with as ignificant improvement of its electronic transport.…”

Gitteröffnung durch reduktive kovalente Volumen‐Funktionalisierung von schwarzem Phosphor

“…[1][2][3][4][5][6][7][8][9] Im Unterschied zu Graphen besteht BP aus gewellten Schichten, die ausschließlich aus einem 2D-s-System gebildet werden und in denen jedes P-Atom ein freies Elektronenpaar aufweist. [1][2][3][4][5][6][7][8][9] Im Unterschied zu Graphen besteht BP aus gewellten Schichten, die ausschließlich aus einem 2D-s-System gebildet werden und in denen jedes P-Atom ein freies Elektronenpaar aufweist.…”

“…[1][2][3][4][5][6][7][8][9] Im Unterschied zu Graphen besteht BP aus gewellten Schichten, die ausschließlich aus einem 2D-s-System gebildet werden und in denen jedes P-Atom ein freies Elektronenpaar aufweist. Durche ffektive reduktive Aktivierung wurde die kovalente Funktionalisierung des geladenen BP mit Alkylhalogeniden erreicht.…”